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HOME > PHP > PHP Forum > สอบถามว่า ต้องเขียน Code อย่างไร จึงจะทำให้ระบบ Tesseract js อ่านภาษาไทยแบบ OCR ได้ดีเทียบเท่า Google Cloud Vision API ครับ



 

สอบถามว่า ต้องเขียน Code อย่างไร จึงจะทำให้ระบบ Tesseract js อ่านภาษาไทยแบบ OCR ได้ดีเทียบเท่า Google Cloud Vision API ครับ

 



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สถานะออฟไลน์




สอบถามว่า ต้องเขียน Code อย่างไร จึงจะทำให้ระบบ Tesseract js อ่านภาษาไทยแบบ OCR ได้ดีเทียบเท่า Google Cloud Vision API เนื่องจากได้ลองเขียน Code เรื่องระบบ Tesseract js กับการอ่านภาษาไทยแบบ OCR ตาม Link

https://webunique.in.th/blog/2016/11/23/การแปลงรูปภาพข้อความเป/

Code ทั้งหมด มีดังนี้

1. index.html

<!DOCTYPE html>                    
<head>
<title>OCR แปลงรูปภาพข้อความเป็นข้อความที่แก้ไขได้</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<link rel="stylesheet" href="css/bootstrap.min.css" >
<link rel="stylesheet" href="css/bootstrap-theme.min.css" >
<script src="js/bootstrap.min.js"></script>
<script src="js/tesseract.js"></script>
<script>
 
    $(document).ready(function(){
     
      createorc($("#dataface").attr("src"));
 
    function readURL(input) {
 
        if (input[0].value != "") {
            var reader = new FileReader();
             
            reader.onload = function (e) {
                    createorc(e.target.result);
            }
             
            reader.readAsDataURL(input[0].files[0]);
          }
}
 
      function createorc(result){
       
       var img = '<img id="dataface" src="'+result+'" style="max-width:100%;">';
       
        $("#preview").html(img).promise().done(function(){
                   
        Tesseract.recognize(result,{lang: $(".langdetect").val()})
       .progress(function  (p) { $("#loading").show(); })
       .then(data => {
       
            $(".showtxt").html(data.text.replace(/n/g, "<br />"));
             
       })
       .catch(err => {
        //console.log('catchn', err);
        })
       .finally(e => {
  
       $("#loading").hide();
           
        });
        }
        )
        }
 
  $( "#imagebroswer" ).change(function() { 
                readURL($(this));
    });
   });
</script>
  <style>
    #loading {
    display:none;
    top: 0;
    left: 0;
    background-color: rgba(255,255,255,.8);
    min-width: 100%;
    min-height: 100%;
    height: auto;
    position: fixed;
    z-index: 100000000;
    }
     
    .abx{
    position: absolute;
    width:100%;
    text-align: center;
    top:25%;
     
    }
  </style>
</head>                  
<body>
<div id="loading">
  <div class="abx">
     <div align="center">กำลังประมวลผล</div>
  </div>
</div>
     
       <div class="container" style="padding:25px;">
   <div class="row">
 
   <h3>OCR แปลงรูปภาพข้อความเป็นข้อความที่แก้ไขได้</h3>
     <div class="form-group">
 
   <div  class="col-md-3">
   <label for="">เลือกภาษา</label>
  <select class="form-control langdetect" >
     
  <option value='eng'     selected> English  </option>
  <option value='tha'> Thai </option>
 
</select>
     
   </div> 
    
    <div  class="col-md-3">
  <label for="">เลือกรูป</label>
  <input class="form-control" id="imagebroswer" type="file">
  </div>
 
</div>
   </div>
   <div  style="">
    <div class="row" >
    <div id="preview" class="col-md-6">      
    <img id="dataface" src="txtsample.png"  style="max-width:100%;"> 
    </div>
       
      <div class="col-md-6">
      <div class="showtxt " style="padding:25px 25px;border:1px solid #000;min-height:200px;">
      </div>
      </div>
       
    </div>
 
</div>
</div>
</body>
</html>


2. tesseract.js (อยู่ใน Floder js ครับ)

(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.Tesseract = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o  )s(r[o]);return s})({1:[function(require,module,exports){
// shim for using process in browser
var process = module.exports = {};
 
// cached from whatever global is present so that test runners that stub it
// don't break things.  But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals.  It's inside a
// function because try/catches deoptimize in certain engines.
 
var cachedSetTimeout;
var cachedClearTimeout;
 
function defaultSetTimout() {
    throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
    throw new Error('clearTimeout has not been defined');
}
(function () {
    try {
        if (typeof setTimeout === 'function') {
            cachedSetTimeout = setTimeout;
        } else {
            cachedSetTimeout = defaultSetTimout;
        }
    } catch (e) {
        cachedSetTimeout = defaultSetTimout;
    }
    try {
        if (typeof clearTimeout === 'function') {
            cachedClearTimeout = clearTimeout;
        } else {
            cachedClearTimeout = defaultClearTimeout;
        }
    } catch (e) {
        cachedClearTimeout = defaultClearTimeout;
    }
} ())
function runTimeout(fun) {
    if (cachedSetTimeout === setTimeout) {
        //normal enviroments in sane situations
        return setTimeout(fun, 0);
    }
    // if setTimeout wasn't available but was latter defined
    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
        cachedSetTimeout = setTimeout;
        return setTimeout(fun, 0);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedSetTimeout(fun, 0);
    } catch(e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
            return cachedSetTimeout.call(null, fun, 0);
        } catch(e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
            return cachedSetTimeout.call(this, fun, 0);
        }
    }
 
 
}
function runClearTimeout(marker) {
    if (cachedClearTimeout === clearTimeout) {
        //normal enviroments in sane situations
        return clearTimeout(marker);
    }
    // if clearTimeout wasn't available but was latter defined
    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
        cachedClearTimeout = clearTimeout;
        return clearTimeout(marker);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedClearTimeout(marker);
    } catch (e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
            return cachedClearTimeout.call(null, marker);
        } catch (e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
            return cachedClearTimeout.call(this, marker);
        }
    }
 
 
 
}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;
 
function cleanUpNextTick() {
    if (!draining || !currentQueue) {
        return;
    }
    draining = false;
    if (currentQueue.length) {
        queue = currentQueue.concat(queue);
    } else {
        queueIndex = -1;
    }
    if (queue.length) {
        drainQueue();
    }
}
 
function drainQueue() {
    if (draining) {
        return;
    }
    var timeout = runTimeout(cleanUpNextTick);
    draining = true;
 
    var len = queue.length;
    while(len) {
        currentQueue = queue;
        queue = [];
        while (++queueIndex < len) {
            if (currentQueue) {
                currentQueue[queueIndex].run();
            }
        }
        queueIndex = -1;
        len = queue.length;
    }
    currentQueue = null;
    draining = false;
    runClearTimeout(timeout);
}
 
process.nextTick = function (fun) {
    var args = new Array(arguments.length - 1);
    if (arguments.length > 1) {
        for (var i = 1; i < arguments.length; i++) {
            args[i - 1] = arguments[i];
        }
    }
    queue.push(new Item(fun, args));
    if (queue.length === 1 && !draining) {
        runTimeout(drainQueue);
    }
};
 
// v8 likes predictible objects
function Item(fun, array) {
    this.fun = fun;
    this.array = array;
}
Item.prototype.run = function () {
    this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};
 
function noop() {}
 
process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;
 
process.binding = function (name) {
    throw new Error('process.binding is not supported');
};
 
process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };
 
},{}],2:[function(require,module,exports){
module.exports={
  "name": "tesseract.js",
  "version": "1.0.10",
  "description": "Pure Javascript Multilingual OCR",
  "main": "src/index.js",
  "scripts": {
    "test": "echo "Error: no test specified" & exit 1",
    "start": "watchify src/index.js  -t [ envify --NODE_ENV development ] -t [ babelify --presets [ es2015 ] ] -o dist/tesseract.dev.js --standalone Tesseract & watchify src/browser/worker.js  -t [ envify --NODE_ENV development ] -t [ babelify --presets [ es2015 ] ] -o dist/worker.dev.js & http-server -p 7355",
    "build": "browserify src/index.js -t [ babelify --presets [ es2015 ] ] -o dist/tesseract.js --standalone Tesseract && browserify src/browser/worker.js -t [ babelify --presets [ es2015 ] ] -o dist/worker.js",
    "release": "npm run build && git commit -am 'new release' && git push && git tag `jq -r '.version' package.json` && git push origin --tags && npm publish"
  },
  "browser": {
    "./src/node/index.js": "./src/browser/index.js"
  },
  "author": "",
  "license": "Apache-2.0",
  "devDependencies": {
    "babel-preset-es2015": "^6.16.0",
    "babelify": "^7.3.0",
    "browserify": "^13.1.0",
    "envify": "^3.4.1",
    "http-server": "^0.9.0",
    "pako": "^1.0.3",
    "watchify": "^3.7.0"
  },
  "dependencies": {
    "file-type": "^3.8.0",
    "is-url": "^1.2.2",
    "jpeg-js": "^0.2.0",
    "level-js": "^2.2.4",
    "node-fetch": "^1.6.3",
    "object-assign": "^4.1.0",
    "png.js": "^0.2.1",
    "tesseract.js-core": "^1.0.2"
  },
  "repository": {
    "type": "git",
    "url": "https://github.com/naptha/tesseract.js.git"
  },
  "bugs": {
    "url": "https://github.com/naptha/tesseract.js/issues"
  },
  "homepage": "https://github.com/naptha/tesseract.js"
}
},{}],3:[function(require,module,exports){
(function (process){
'use strict';
 
var defaultOptions = {
    // workerPath: 'https://cdn.rawgit.com/naptha/tesseract.js/0.2.0/dist/worker.js',
    corePath: 'https://cdn.rawgit.com/naptha/tesseract.js-core/0.1.0/index.js',
    langPath: 'https://cdn.rawgit.com/naptha/tessdata/gh-pages/3.02/'
};
 
if (process.env.NODE_ENV === "development") {
    console.debug('Using Development Configuration');
    defaultOptions.workerPath = location.protocol + '//' + location.host + '/dist/worker.dev.js?nocache=' + Math.random().toString(36).slice(3);
} else {
    var version = require('../../package.json').version;
    defaultOptions.workerPath = 'https://cdn.rawgit.com/naptha/tesseract.js/' + version + '/dist/worker.js';
}
 
exports.defaultOptions = defaultOptions;
 
exports.spawnWorker = function spawnWorker(instance, workerOptions) {
    if (window.Blob && window.URL) {
        var blob = new Blob(['importScripts("' + workerOptions.workerPath + '");']);
        var worker = new Worker(window.URL.createObjectURL(blob));
    } else {
        var worker = new Worker(workerOptions.workerPath);
    }
 
    worker.onmessage = function (e) {
        var packet = e.data;
        instance._recv(packet);
    };
    return worker;
};
 
exports.terminateWorker = function (instance) {
    instance.worker.terminate();
};
 
exports.sendPacket = function sendPacket(instance, packet) {
    loadImage(packet.payload.image, function (img) {
        packet.payload.image = img;
        instance.worker.postMessage(packet);
    });
};
 
function loadImage(image, cb) {
    if (typeof image === 'string') {
        if (/^#/.test(image)) {
            // element css selector
            return loadImage(document.querySelector(image), cb);
        } else if (/(blob|data):/.test(image)) {
            // data url
            var im = new Image();
            im.src = image;
            im.onload = function (e) {
                return loadImage(im, cb);
            };
            return;
        } else {
            var xhr = new XMLHttpRequest();
            xhr.open('GET', image, true);
            xhr.responseType = "blob";
            xhr.onload = function (e) {
                return loadImage(xhr.response, cb);
            };
            xhr.onerror = function (e) {
                if (/^https?:///.test(image) && !/^https://crossorigin.me/.test(image)) {
                    console.debug('Attempting to load image with CORS proxy');
                    loadImage('https://crossorigin.me/' + image, cb);
                }
            };
            xhr.send(null);
            return;
        }
    } else if (image instanceof File) {
        // files
        var fr = new FileReader();
        fr.onload = function (e) {
            return loadImage(fr.result, cb);
        };
        fr.readAsDataURL(image);
        return;
    } else if (image instanceof Blob) {
        return loadImage(URL.createObjectURL(image), cb);
    } else if (image.getContext) {
        // canvas element
        return loadImage(image.getContext('2d'), cb);
    } else if (image.tagName == "IMG" || image.tagName == "VIDEO") {
        // image element or video element
        var c = document.createElement('canvas');
        c.width = image.naturalWidth || image.videoWidth;
        c.height = image.naturalHeight || image.videoHeight;
        var ctx = c.getContext('2d');
        ctx.drawImage(image, 0, 0);
        return loadImage(ctx, cb);
    } else if (image.getImageData) {
        // canvas context
        var data = image.getImageData(0, 0, image.canvas.width, image.canvas.height);
        return loadImage(data, cb);
    } else {
        return cb(image);
    }
    throw new Error('Missing return in loadImage cascade');
}
 
}).call(this,require('_process'))
},{"../../package.json":2,"_process":1}],4:[function(require,module,exports){
"use strict";
 
// The result of dump.js is a big JSON tree
// which can be easily serialized (for instance
// to be sent from a webworker to the main app
// or through Node's IPC), but we want
// a (circular) DOM-like interface for walking
// through the data. 
 
module.exports = function circularize(page) {
    page.paragraphs = [];
    page.lines = [];
    page.words = [];
    page.symbols = [];
 
    page.blocks.forEach(function (block) {
        block.page = page;
 
        block.lines = [];
        block.words = [];
        block.symbols = [];
 
        block.paragraphs.forEach(function (para) {
            para.block = block;
            para.page = page;
 
            para.words = [];
            para.symbols = [];
 
            para.lines.forEach(function (line) {
                line.paragraph = para;
                line.block = block;
                line.page = page;
 
                line.symbols = [];
 
                line.words.forEach(function (word) {
                    word.line = line;
                    word.paragraph = para;
                    word.block = block;
                    word.page = page;
                    word.symbols.forEach(function (sym) {
                        sym.word = word;
                        sym.line = line;
                        sym.paragraph = para;
                        sym.block = block;
                        sym.page = page;
 
                        sym.line.symbols.push(sym);
                        sym.paragraph.symbols.push(sym);
                        sym.block.symbols.push(sym);
                        sym.page.symbols.push(sym);
                    });
                    word.paragraph.words.push(word);
                    word.block.words.push(word);
                    word.page.words.push(word);
                });
                line.block.lines.push(line);
                line.page.lines.push(line);
            });
            para.page.paragraphs.push(para);
        });
    });
    return page;
};
 
},{}],5:[function(require,module,exports){
'use strict';
 
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
 
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
var adapter = require('../node/index.js');
 
var jobCounter = 0;
 
module.exports = function () {
    function TesseractJob(instance) {
        _classCallCheck(this, TesseractJob);
 
        this.id = 'Job-' + ++jobCounter + '-' + Math.random().toString(16).slice(3, 8);
 
        this._instance = instance;
        this._resolve = [];
        this._reject = [];
        this._progress = [];
        this._finally = [];
    }
 
    _createClass(TesseractJob, [{
        key: 'then',
        value: function then(resolve, reject) {
            if (this._resolve.push) {
                this._resolve.push(resolve);
            } else {
                resolve(this._resolve);
            }
 
            if (reject) this.catch(reject);
            return this;
        }
    }, {
        key: 'catch',
        value: function _catch(reject) {
            if (this._reject.push) {
                this._reject.push(reject);
            } else {
                reject(this._reject);
            }
            return this;
        }
    }, {
        key: 'progress',
        value: function progress(fn) {
            this._progress.push(fn);
            return this;
        }
    }, {
        key: 'finally',
        value: function _finally(fn) {
            this._finally.push(fn);
            return this;
        }
    }, {
        key: '_send',
        value: function _send(action, payload) {
            adapter.sendPacket(this._instance, {
                jobId: this.id,
                action: action,
                payload: payload
            });
        }
    }, {
        key: '_handle',
        value: function _handle(packet) {
            var data = packet.data;
            var runFinallyCbs = false;
 
            if (packet.status === 'resolve') {
                if (this._resolve.length === 0) console.log(data);
                this._resolve.forEach(function (fn) {
                    var ret = fn(data);
                    if (ret && typeof ret.then == 'function') {
                        console.warn('TesseractJob instances do not chain like ES6 Promises. To convert it into a real promise, use Promise.resolve.');
                    }
                });
                this._resolve = data;
                this._instance._dequeue();
                runFinallyCbs = true;
            } else if (packet.status === 'reject') {
                if (this._reject.length === 0) console.error(data);
                this._reject.forEach(function (fn) {
                    return fn(data);
                });
                this._reject = data;
                this._instance._dequeue();
                runFinallyCbs = true;
            } else if (packet.status === 'progress') {
                this._progress.forEach(function (fn) {
                    return fn(data);
                });
            } else {
                console.warn('Message type unknown', packet.status);
            }
 
            if (runFinallyCbs) {
                this._finally.forEach(function (fn) {
                    return fn(data);
                });
            }
        }
    }]);
 
    return TesseractJob;
}();
 
},{"../node/index.js":3}],6:[function(require,module,exports){
'use strict';
 
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
 
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
var adapter = require('./node/index.js');
var circularize = require('./common/circularize.js');
var TesseractJob = require('./common/job');
var version = require('../package.json').version;
 
function create() {
    var workerOptions = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
 
    var worker = new TesseractWorker(Object.assign({}, adapter.defaultOptions, workerOptions));
    worker.create = create;
    worker.version = version;
    return worker;
}
 
var TesseractWorker = function () {
    function TesseractWorker(workerOptions) {
        _classCallCheck(this, TesseractWorker);
 
        this.worker = null;
        this.workerOptions = workerOptions;
        this._currentJob = null;
        this._queue = [];
    }
 
    _createClass(TesseractWorker, [{
        key: 'recognize',
        value: function recognize(image) {
            var _this = this;
 
            var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
 
            return this._delay(function (job) {
                if (typeof options === 'string') options = { lang: options };
                options.lang = options.lang || 'eng';
 
                job._send('recognize', { image: image, options: options, workerOptions: _this.workerOptions });
            });
        }
    }, {
        key: 'detect',
        value: function detect(image) {
            var _this2 = this;
 
            var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
 
            return this._delay(function (job) {
                job._send('detect', { image: image, options: options, workerOptions: _this2.workerOptions });
            });
        }
    }, {
        key: 'terminate',
        value: function terminate() {
            if (this.worker) adapter.terminateWorker(this);
            this.worker = null;
        }
    }, {
        key: '_delay',
        value: function _delay(fn) {
            var _this3 = this;
 
            if (!this.worker) this.worker = adapter.spawnWorker(this, this.workerOptions);
 
            var job = new TesseractJob(this);
            this._queue.push(function (e) {
                _this3._queue.shift();
                _this3._currentJob = job;
                fn(job);
            });
            if (!this._currentJob) this._dequeue();
            return job;
        }
    }, {
        key: '_dequeue',
        value: function _dequeue() {
            this._currentJob = null;
            if (this._queue.length) {
                this._queue[0]();
            }
        }
    }, {
        key: '_recv',
        value: function _recv(packet) {
            if (packet.status === 'resolve' && packet.action === 'recognize') {
                packet.data = circularize(packet.data);
            }
 
            if (this._currentJob.id === packet.jobId) {
                this._currentJob._handle(packet);
            } else {
                console.warn('Job ID ' + packet.jobId + ' not known.');
            }
        }
    }]);
 
    return TesseractWorker;
}();
 
module.exports = create();
 
},{"../package.json":2,"./common/circularize.js":4,"./common/job":5,"./node/index.js":3}]},{},[6])(6)
});


3. Link สำหรับ Download Source Code ทั้งหมดครับ - https://webunique.in.th/blog/simple/ocr.zip ซึ่งมีโครงสร้างของไฟล์ทั้งหมด ดังนี้ครับ

pic1

แล้วติดปัญหาในการ OCR คือ ได้ลองตัวอย่างรูปฉลากสินค้า ตาม Link ตัวอย่างรูป

https://www.beartai.com/wp-content/uploads/2019/06/WaiWai_02-768x512.jpg

และทำการ Crop เอาเฉพาะส่วนผสมของอาหาร ตามรูปด้านล่างครับ

pic2

แล้วทำการทดสอบ Code ในส่วนระบบ Tesseract js แล้วเจอปัญหาในเรื่อง OCR ออกมาได้ข้อมูลไม่ถูกต้อง และ OCR ได้เฉพาะแบบเลือกทีละ 1 ภาษาเท่านั้น ตามรูปด้านล่างครับ

pic3

จึงสอบถามว่า ต้องแก้ไข Code อย่างไร จึงจะ OCR ด้วยระบบ Tesseract js แล้ว อ่านค่าได้ถูกต้อง และอ่านค่าได้พร้อมกันทั้ง 2 ภาษา ตามรูปที่ต้องการอ่านค่าได้ถูกต้อง ด้านล่างครับ

pic4



Tag : PHP, HTML, HTML5, JavaScript, XAMPP, Windows







Move To Hilight (Stock) 
Send To Friend.Bookmark.
Date : 2020-06-11 20:21:06 By : doanga2007 View : 143 Reply : 5
 

 

No. 1



โพสกระทู้ ( 914 )
บทความ ( 0 )



สถานะออฟไลน์
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ลอง

Index.html line:036
Code (JavaScript)
Tesseract.recognize(result,{lang: 'eng+tha'})


ตอนเทสเลือกภาษาอะไรก็ได้
หรือ แก้ที่ line:099-100

Code (HTML)
<option value='eng+tha'> English + Thai </option>




https://tesseract-ocr.github.io/tessdoc/Command-Line-Usage.html#simplest-invocation-to-ocr-an-image






แสดงความคิดเห็นโดยอ้างถึง ความคิดเห็นนี้
Date : 2020-06-11 23:29:10 By : PhrayaDev
 


 

No. 2



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บทความ ( 12 )



สถานะออฟไลน์


ตอบความคิดเห็นที่ : 1 เขียนโดย : PhrayaDev เมื่อวันที่ 2020-06-11 23:29:10
รายละเอียดของการตอบ ::
ได้ทดลองการเขียน Code ความคิดเห็นของ "พระยาเทพ" แล้ว ผลสรุป คือ ไม่แสดงข้อความใดๆ หลังจาก OCR ออกมาเลย จากตัวเลือก English + Thai ตามรูปด้านล่างครับ

problem3

ก่อนหน้าที่จะ เขียน Code ความคิดเห็นของ "พระยาเทพ" นั้น ยังสามารถ OCR แยกภาษา ตามตัวเลือกได้ตามปกติ ตามรูปด้านล่างครับ

problem1

problem2

และภาพตัวอย่างที่ใช้ในการทดสอบครั้งนี้ครับ

problem4

Code ที่ปรับปรุงทั้งหมดครับ

1. index.html

<!DOCTYPE html>                    
<head>
<title>OCR แปลงรูปภาพข้อความเป็นข้อความที่แก้ไขได้</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<link rel="stylesheet" href="css/bootstrap.min.css" >
<link rel="stylesheet" href="css/bootstrap-theme.min.css" >
<script src="js/bootstrap.min.js"></script>
<script src="js/tesseract.js"></script>
<script>

    $(document).ready(function(){
    
      createorc($("#dataface").attr("src"));

	function readURL(input) {

        if (input[0].value != "") {
            var reader = new FileReader();
            
            reader.onload = function (e) {
                    createorc(e.target.result);
            }
            
            reader.readAsDataURL(input[0].files[0]);
          }
}

      function createorc(result){
      
       var img = '<img id="dataface" src="'+result+'" style="max-width:100%;">';
      
        $("#preview").html(img).promise().done(function(){
        
		Tesseract.recognize(result,{lang: 'eng+tha'})	
       .progress(function  (p) { $("#loading").show(); })
       .then(data => {
      
            $(".addvalue4").html(data.text.replace(/\n/g, ""));
            
       })
       .catch(err => {
        //console.log('catch\n', err);
        })
       .finally(e => {
 
       $("#loading").hide();
          
        });
        }
        )
        }

  $( "#imagebroswer" ).change(function() { 
                readURL($(this));
    });
   });
</script>
  <style>
    #loading {
    display:none;
    top: 0;
    left: 0;
    background-color: rgba(255,255,255,.9);
    min-width: 100%;
    min-height: 100%;
    height: auto;
    position: fixed;
    z-index: 100000000;
    }
    
    .abx{
    position: absolute;
    width:100%;
    text-align: center;
    top:25%;
    }
  </style>
</head>                  
<body>
<div id="loading">
  <div class="abx">
     <div align="center" style="font-size: 50px;"><strong>กำลัง Load รูปภาพ เพื่อประมวลผล</strong></div><br><br>
	 <div align="center"><img src="loading.gif"></div>
  </div>
</div>
    
<div class="container" style="padding:25px;">
<div class="row">
   <h3>OCR แปลงรูปภาพข้อความเป็นข้อความที่แก้ไขได้</h3>
<div class="form-group">
  <div class="col-md-3">
  <label for="">เลือกภาษา</label>
  <select class="form-control langdetect" > 
  <option value='eng+tha'> English + Thai </option>
  </select>
  </div> 
   
  <div class="col-md-3">
  <label for="">เลือกรูป</label>
  <input class="form-control" id="imagebroswer" type="file">
  </div>
</div>
</div>

<div style="">
    <div class="row">
    <div id="preview" class="col-md-6">      
    <img id="dataface" src="txtsample.png"  style="max-width:100%;"> 
    </div>
      <div class="col-md-6">
		<textarea rows="1" cols="15" class="addvalue4 " name="addvalue4" style="border:none;">
		</textarea>
      </div>
    </div>
</div>
</div>
</body>
</html>


2. tesseract.js (อยู่ใน Floder js ครับ)

(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.Tesseract = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
// shim for using process in browser
var process = module.exports = {};

// cached from whatever global is present so that test runners that stub it
// don't break things.  But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals.  It's inside a
// function because try/catches deoptimize in certain engines.

var cachedSetTimeout;
var cachedClearTimeout;

function defaultSetTimout() {
    throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
    throw new Error('clearTimeout has not been defined');
}
(function () {
    try {
        if (typeof setTimeout === 'function') {
            cachedSetTimeout = setTimeout;
        } else {
            cachedSetTimeout = defaultSetTimout;
        }
    } catch (e) {
        cachedSetTimeout = defaultSetTimout;
    }
    try {
        if (typeof clearTimeout === 'function') {
            cachedClearTimeout = clearTimeout;
        } else {
            cachedClearTimeout = defaultClearTimeout;
        }
    } catch (e) {
        cachedClearTimeout = defaultClearTimeout;
    }
} ())
function runTimeout(fun) {
    if (cachedSetTimeout === setTimeout) {
        //normal enviroments in sane situations
        return setTimeout(fun, 0);
    }
    // if setTimeout wasn't available but was latter defined
    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
        cachedSetTimeout = setTimeout;
        return setTimeout(fun, 0);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedSetTimeout(fun, 0);
    } catch(e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
            return cachedSetTimeout.call(null, fun, 0);
        } catch(e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
            return cachedSetTimeout.call(this, fun, 0);
        }
    }


}
function runClearTimeout(marker) {
    if (cachedClearTimeout === clearTimeout) {
        //normal enviroments in sane situations
        return clearTimeout(marker);
    }
    // if clearTimeout wasn't available but was latter defined
    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
        cachedClearTimeout = clearTimeout;
        return clearTimeout(marker);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedClearTimeout(marker);
    } catch (e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
            return cachedClearTimeout.call(null, marker);
        } catch (e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
            return cachedClearTimeout.call(this, marker);
        }
    }



}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;

function cleanUpNextTick() {
    if (!draining || !currentQueue) {
        return;
    }
    draining = false;
    if (currentQueue.length) {
        queue = currentQueue.concat(queue);
    } else {
        queueIndex = -1;
    }
    if (queue.length) {
        drainQueue();
    }
}

function drainQueue() {
    if (draining) {
        return;
    }
    var timeout = runTimeout(cleanUpNextTick);
    draining = true;

    var len = queue.length;
    while(len) {
        currentQueue = queue;
        queue = [];
        while (++queueIndex < len) {
            if (currentQueue) {
                currentQueue[queueIndex].run();
            }
        }
        queueIndex = -1;
        len = queue.length;
    }
    currentQueue = null;
    draining = false;
    runClearTimeout(timeout);
}

process.nextTick = function (fun) {
    var args = new Array(arguments.length - 1);
    if (arguments.length > 1) {
        for (var i = 1; i < arguments.length; i++) {
            args[i - 1] = arguments[i];
        }
    }
    queue.push(new Item(fun, args));
    if (queue.length === 1 && !draining) {
        runTimeout(drainQueue);
    }
};

// v8 likes predictible objects
function Item(fun, array) {
    this.fun = fun;
    this.array = array;
}
Item.prototype.run = function () {
    this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};

function noop() {}

process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;

process.binding = function (name) {
    throw new Error('process.binding is not supported');
};

process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };

},{}],2:[function(require,module,exports){
module.exports={
  "name": "tesseract.js",
  "version": "1.0.10",
  "description": "Pure Javascript Multilingual OCR",
  "main": "src/index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" & exit 1",
    "start": "watchify src/index.js  -t [ envify --NODE_ENV development ] -t [ babelify --presets [ es2015 ] ] -o dist/tesseract.dev.js --standalone Tesseract & watchify src/browser/worker.js  -t [ envify --NODE_ENV development ] -t [ babelify --presets [ es2015 ] ] -o dist/worker.dev.js & http-server -p 7355",
    "build": "browserify src/index.js -t [ babelify --presets [ es2015 ] ] -o dist/tesseract.js --standalone Tesseract && browserify src/browser/worker.js -t [ babelify --presets [ es2015 ] ] -o dist/worker.js",
    "release": "npm run build && git commit -am 'new release' && git push && git tag `jq -r '.version' package.json` && git push origin --tags && npm publish"
  },
  "browser": {
    "./src/node/index.js": "./src/browser/index.js"
  },
  "author": "",
  "license": "Apache-2.0",
  "devDependencies": {
    "babel-preset-es2015": "^6.16.0",
    "babelify": "^7.3.0",
    "browserify": "^13.1.0",
    "envify": "^3.4.1",
    "http-server": "^0.9.0",
    "pako": "^1.0.3",
    "watchify": "^3.7.0"
  },
  "dependencies": {
    "file-type": "^3.8.0",
    "is-url": "^1.2.2",
    "jpeg-js": "^0.2.0",
    "level-js": "^2.2.4",
    "node-fetch": "^1.6.3",
    "object-assign": "^4.1.0",
    "png.js": "^0.2.1",
    "tesseract.js-core": "^1.0.2"
  },
  "repository": {
    "type": "git",
    "url": "https://github.com/naptha/tesseract.js.git"
  },
  "bugs": {
    "url": "https://github.com/naptha/tesseract.js/issues"
  },
  "homepage": "https://github.com/naptha/tesseract.js"
}
},{}],3:[function(require,module,exports){
(function (process){
'use strict';

var defaultOptions = {
    // workerPath: 'https://cdn.rawgit.com/naptha/tesseract.js/0.2.0/dist/worker.js',
    corePath: 'https://cdn.rawgit.com/naptha/tesseract.js-core/0.1.0/index.js',
    langPath: 'https://cdn.rawgit.com/naptha/tessdata/gh-pages/3.02/'
};

if (process.env.NODE_ENV === "development") {
    console.debug('Using Development Configuration');
    defaultOptions.workerPath = location.protocol + '//' + location.host + '/dist/worker.dev.js?nocache=' + Math.random().toString(36).slice(3);
} else {
    var version = require('../../package.json').version;
    defaultOptions.workerPath = 'https://cdn.rawgit.com/naptha/tesseract.js/' + version + '/dist/worker.js';
}

exports.defaultOptions = defaultOptions;

exports.spawnWorker = function spawnWorker(instance, workerOptions) {
    if (window.Blob && window.URL) {
        var blob = new Blob(['importScripts("' + workerOptions.workerPath + '");']);
        var worker = new Worker(window.URL.createObjectURL(blob));
    } else {
        var worker = new Worker(workerOptions.workerPath);
    }

    worker.onmessage = function (e) {
        var packet = e.data;
        instance._recv(packet);
    };
    return worker;
};

exports.terminateWorker = function (instance) {
    instance.worker.terminate();
};

exports.sendPacket = function sendPacket(instance, packet) {
    loadImage(packet.payload.image, function (img) {
        packet.payload.image = img;
        instance.worker.postMessage(packet);
    });
};

function loadImage(image, cb) {
    if (typeof image === 'string') {
        if (/^\#/.test(image)) {
            // element css selector
            return loadImage(document.querySelector(image), cb);
        } else if (/(blob|data)\:/.test(image)) {
            // data url
            var im = new Image();
            im.src = image;
            im.onload = function (e) {
                return loadImage(im, cb);
            };
            return;
        } else {
            var xhr = new XMLHttpRequest();
            xhr.open('GET', image, true);
            xhr.responseType = "blob";
            xhr.onload = function (e) {
                return loadImage(xhr.response, cb);
            };
            xhr.onerror = function (e) {
                if (/^https?:\/\//.test(image) && !/^https:\/\/crossorigin.me/.test(image)) {
                    console.debug('Attempting to load image with CORS proxy');
                    loadImage('https://crossorigin.me/' + image, cb);
                }
            };
            xhr.send(null);
            return;
        }
    } else if (image instanceof File) {
        // files
        var fr = new FileReader();
        fr.onload = function (e) {
            return loadImage(fr.result, cb);
        };
        fr.readAsDataURL(image);
        return;
    } else if (image instanceof Blob) {
        return loadImage(URL.createObjectURL(image), cb);
    } else if (image.getContext) {
        // canvas element
        return loadImage(image.getContext('2d'), cb);
    } else if (image.tagName == "IMG" || image.tagName == "VIDEO") {
        // image element or video element
        var c = document.createElement('canvas');
        c.width = image.naturalWidth || image.videoWidth;
        c.height = image.naturalHeight || image.videoHeight;
        var ctx = c.getContext('2d');
        ctx.drawImage(image, 0, 0);
        return loadImage(ctx, cb);
    } else if (image.getImageData) {
        // canvas context
        var data = image.getImageData(0, 0, image.canvas.width, image.canvas.height);
        return loadImage(data, cb);
    } else {
        return cb(image);
    }
    throw new Error('Missing return in loadImage cascade');
}

}).call(this,require('_process'))
},{"../../package.json":2,"_process":1}],4:[function(require,module,exports){
"use strict";

// The result of dump.js is a big JSON tree
// which can be easily serialized (for instance
// to be sent from a webworker to the main app
// or through Node's IPC), but we want
// a (circular) DOM-like interface for walking
// through the data. 

module.exports = function circularize(page) {
    page.paragraphs = [];
    page.lines = [];
    page.words = [];
    page.symbols = [];

    page.blocks.forEach(function (block) {
        block.page = page;

        block.lines = [];
        block.words = [];
        block.symbols = [];

        block.paragraphs.forEach(function (para) {
            para.block = block;
            para.page = page;

            para.words = [];
            para.symbols = [];

            para.lines.forEach(function (line) {
                line.paragraph = para;
                line.block = block;
                line.page = page;

                line.symbols = [];

                line.words.forEach(function (word) {
                    word.line = line;
                    word.paragraph = para;
                    word.block = block;
                    word.page = page;
                    word.symbols.forEach(function (sym) {
                        sym.word = word;
                        sym.line = line;
                        sym.paragraph = para;
                        sym.block = block;
                        sym.page = page;

                        sym.line.symbols.push(sym);
                        sym.paragraph.symbols.push(sym);
                        sym.block.symbols.push(sym);
                        sym.page.symbols.push(sym);
                    });
                    word.paragraph.words.push(word);
                    word.block.words.push(word);
                    word.page.words.push(word);
                });
                line.block.lines.push(line);
                line.page.lines.push(line);
            });
            para.page.paragraphs.push(para);
        });
    });
    return page;
};

},{}],5:[function(require,module,exports){
'use strict';

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var adapter = require('../node/index.js');

var jobCounter = 0;

module.exports = function () {
    function TesseractJob(instance) {
        _classCallCheck(this, TesseractJob);

        this.id = 'Job-' + ++jobCounter + '-' + Math.random().toString(16).slice(3, 8);

        this._instance = instance;
        this._resolve = [];
        this._reject = [];
        this._progress = [];
        this._finally = [];
    }

    _createClass(TesseractJob, [{
        key: 'then',
        value: function then(resolve, reject) {
            if (this._resolve.push) {
                this._resolve.push(resolve);
            } else {
                resolve(this._resolve);
            }

            if (reject) this.catch(reject);
            return this;
        }
    }, {
        key: 'catch',
        value: function _catch(reject) {
            if (this._reject.push) {
                this._reject.push(reject);
            } else {
                reject(this._reject);
            }
            return this;
        }
    }, {
        key: 'progress',
        value: function progress(fn) {
            this._progress.push(fn);
            return this;
        }
    }, {
        key: 'finally',
        value: function _finally(fn) {
            this._finally.push(fn);
            return this;
        }
    }, {
        key: '_send',
        value: function _send(action, payload) {
            adapter.sendPacket(this._instance, {
                jobId: this.id,
                action: action,
                payload: payload
            });
        }
    }, {
        key: '_handle',
        value: function _handle(packet) {
            var data = packet.data;
            var runFinallyCbs = false;

            if (packet.status === 'resolve') {
                if (this._resolve.length === 0) console.log(data);
                this._resolve.forEach(function (fn) {
                    var ret = fn(data);
                    if (ret && typeof ret.then == 'function') {
                        console.warn('TesseractJob instances do not chain like ES6 Promises. To convert it into a real promise, use Promise.resolve.');
                    }
                });
                this._resolve = data;
                this._instance._dequeue();
                runFinallyCbs = true;
            } else if (packet.status === 'reject') {
                if (this._reject.length === 0) console.error(data);
                this._reject.forEach(function (fn) {
                    return fn(data);
                });
                this._reject = data;
                this._instance._dequeue();
                runFinallyCbs = true;
            } else if (packet.status === 'progress') {
                this._progress.forEach(function (fn) {
                    return fn(data);
                });
            } else {
                console.warn('Message type unknown', packet.status);
            }

            if (runFinallyCbs) {
                this._finally.forEach(function (fn) {
                    return fn(data);
                });
            }
        }
    }]);

    return TesseractJob;
}();

},{"../node/index.js":3}],6:[function(require,module,exports){
'use strict';

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var adapter = require('./node/index.js');
var circularize = require('./common/circularize.js');
var TesseractJob = require('./common/job');
var version = require('../package.json').version;

function create() {
	var workerOptions = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

	var worker = new TesseractWorker(Object.assign({}, adapter.defaultOptions, workerOptions));
	worker.create = create;
	worker.version = version;
	return worker;
}

var TesseractWorker = function () {
	function TesseractWorker(workerOptions) {
		_classCallCheck(this, TesseractWorker);

		this.worker = null;
		this.workerOptions = workerOptions;
		this._currentJob = null;
		this._queue = [];
	}

	_createClass(TesseractWorker, [{
		key: 'recognize',
		value: function recognize(image) {
			var _this = this;

			var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

			return this._delay(function (job) {
				if (typeof options === 'string') options = { lang: options };
				options.lang = options.lang || 'eng';

				job._send('recognize', { image: image, options: options, workerOptions: _this.workerOptions });
			});
		}
	}, {
		key: 'detect',
		value: function detect(image) {
			var _this2 = this;

			var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

			return this._delay(function (job) {
				job._send('detect', { image: image, options: options, workerOptions: _this2.workerOptions });
			});
		}
	}, {
		key: 'terminate',
		value: function terminate() {
			if (this.worker) adapter.terminateWorker(this);
			this.worker = null;
		}
	}, {
		key: '_delay',
		value: function _delay(fn) {
			var _this3 = this;

			if (!this.worker) this.worker = adapter.spawnWorker(this, this.workerOptions);

			var job = new TesseractJob(this);
			this._queue.push(function (e) {
				_this3._queue.shift();
				_this3._currentJob = job;
				fn(job);
			});
			if (!this._currentJob) this._dequeue();
			return job;
		}
	}, {
		key: '_dequeue',
		value: function _dequeue() {
			this._currentJob = null;
			if (this._queue.length) {
				this._queue[0]();
			}
		}
	}, {
		key: '_recv',
		value: function _recv(packet) {
			if (packet.status === 'resolve' && packet.action === 'recognize') {
				packet.data = circularize(packet.data);
			}

			if (this._currentJob.id === packet.jobId) {
				this._currentJob._handle(packet);
			} else {
				console.warn('Job ID ' + packet.jobId + ' not known.');
			}
		}
	}]);

	return TesseractWorker;
}();

module.exports = create();

},{"../package.json":2,"./common/circularize.js":4,"./common/job":5,"./node/index.js":3}]},{},[6])(6)
});


3. Link สำหรับ Download Source Code ทั้งหมดครับ - https://webunique.in.th/blog/simple/ocr.zip ซึ่งมีโครงสร้างของไฟล์ทั้งหมด ดังนี้ครับ

pic1




ประวัติการแก้ไข
2020-06-16 10:48:29
2020-06-17 14:07:14
แสดงความคิดเห็นโดยอ้างถึง ความคิดเห็นนี้
Date : 2020-06-16 10:43:41 By : doanga2007
 

 

No. 3



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บทความ ( 0 )



สถานะออฟไลน์
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เอา งานเข้าล่ะ ลองอัปเดต Tesseract เป็น version ล่าสุดหรือยังครับ
แสดงความคิดเห็นโดยอ้างถึง ความคิดเห็นนี้
Date : 2020-06-16 15:06:57 By : PhrayaDev
 


 

No. 4



โพสกระทู้ ( 3,857 )
บทความ ( 8 )



สถานะออฟไลน์


tesseract.js v2 อ่านไทยได้แย่ลงครับ ลองแล้ว ไม่แนะนำ
แสดงความคิดเห็นโดยอ้างถึง ความคิดเห็นนี้
Date : 2020-06-16 16:11:26 By : mr.v
 


 

No. 5



โพสกระทู้ ( 914 )
บทความ ( 0 )



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อืม...V.2 ห่วยจริง (ทดสอบแค่แบบเบสิก)
เมื่อเทียบกับ V1 แตกต่างกันขนาดไหน...ไม่รู้ (ยังไม่ลอง V1)
แต่ข้อดีของ V2 คือ สามารถสแกนแบบหลายภาษาได้

โค้ดพื้นฐานที่ใช้ทดสอบ Tesseract.js V2 (ไม่ทำงานใน Microsoft Browser)
Code (JavaScript)
<!doctype html>
<html>
<head>
  <title>ทดสอบ Tesseract.js 2</title>
</head>
<body>
<p id="status"></p>
<script src='https://unpkg.com/[email protected]/dist/tesseract.min.js'></script>
<!-- <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/tesseract.min.js"></script> -->
<script>
	var sta = document.getElementById("status");
    const recogImage = 'https://i.imgur.com/imFDi3l.png';
    /*
    https://i.imgur.com/atVCSZv.png
	https://i.imgur.com/4Ixp69R.jpg
    */

    const worker = Tesseract.createWorker({
      logger: m => sta.innerHTML = m.status
    });
    Tesseract.setLogging(true);
    work();

    async function work() {
      await worker.load();
      await worker.loadLanguage('eng+tha');
      await worker.initialize('eng+tha');

      //let result = await worker.detect(recogImage);
      //console.log(result.data);

      let result = await worker.recognize(recogImage);
      sta.innerHTML = result.data.text;

      await worker.terminate();
    }
    
// https://www.thaicreate.com/php/forum/135293.html
</script>
</body>
</html>



https://www.w3schools.com/code/tryit.asp?filename=GFVGTF07J4WU

แต่ก็ยังสรุปไม่ได้ว่า ห่วยเพราะการตั้งค่า หรือ ตัว library

การใช้งาน API ในเชิงลึกยังมีอะไรที่ให้เลือกใช้อีกเยอะ (ส่วนรายละเอียด ยังไม่ลอง)
https://github.com/naptha/tesseract.js/blob/master/docs/api.md

เช่น อาจเปลี่ยนไปใช้ datafile ของเวอร์ชันเก่า ด้วย langPath option ฯลฯ

https://tesseract-ocr.github.io/tessdoc/Data-Files



https://golb.hplar.ch/2019/07/ocr-with-tesseractjs.html
แสดงความคิดเห็นโดยอ้างถึง ความคิดเห็นนี้
Date : 2020-06-17 17:44:34 By : PhrayaDev
 

   

ค้นหาข้อมูล


   
 

แสดงความคิดเห็น
Re : สอบถามว่า ต้องเขียน Code อย่างไร จึงจะทำให้ระบบ Tesseract js อ่านภาษาไทยแบบ OCR ได้ดีเทียบเท่า Google Cloud Vision API ครับ
 
 
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