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tesseract.js
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Guillermo 8 years ago
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2 changed files with 497 additions and 417 deletions
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  1. 442
      dist/tesseract.js
  2. 360
      dist/worker.js

442
dist/tesseract.js vendored
Unescape View File

@ -313,107 +313,114 @@ module.exports={
},{}],4:[function(require,module,exports){ },{}],4:[function(require,module,exports){
(function (process){ (function (process){
'use strict';
var defaultOptions = { var defaultOptions = {
// workerPath: 'https://cdn.rawgit.com/naptha/tesseract.js/0.2.0/dist/worker.js', // 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', 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/', langPath: 'https://cdn.rawgit.com/naptha/tessdata/gh-pages/3.02/'
} };
if (process.env.NODE_ENV === "development") { if (process.env.NODE_ENV === "development") {
console.debug('Using Development Configuration') console.debug('Using Development Configuration');
defaultOptions.workerPath = location.protocol + '//' + location.host + '/dist/worker.dev.js?nocache=' + Math.random().toString(36).slice(3) defaultOptions.workerPath = location.protocol + '//' + location.host + '/dist/worker.dev.js?nocache=' + Math.random().toString(36).slice(3);
}else{ } else {
var version = require('../../package.json').version; var version = require('../../package.json').version;
defaultOptions.workerPath = 'https://cdn.rawgit.com/naptha/tesseract.js/' + version + '/dist/worker.js' defaultOptions.workerPath = 'https://cdn.rawgit.com/naptha/tesseract.js/' + version + '/dist/worker.js';
} }
exports.defaultOptions = defaultOptions; exports.defaultOptions = defaultOptions;
exports.spawnWorker = function spawnWorker(instance, workerOptions) {
exports.spawnWorker = function spawnWorker(instance, workerOptions){ if (window.Blob && window.URL) {
if(window.Blob && window.URL){ var blob = new Blob(['importScripts("' + workerOptions.workerPath + '");']);
var blob = new Blob(['importScripts("' + workerOptions.workerPath + '");'])
var worker = new Worker(window.URL.createObjectURL(blob)); var worker = new Worker(window.URL.createObjectURL(blob));
}else{ } else {
var worker = new Worker(workerOptions.workerPath) var worker = new Worker(workerOptions.workerPath);
} }
worker.onmessage = function(e){ worker.onmessage = function (e) {
var packet = e.data; var packet = e.data;
instance._recv(packet) instance._recv(packet);
} };
return worker return worker;
} };
exports.terminateWorker = function(instance){
instance.worker.terminate()
}
exports.sendPacket = function sendPacket(instance, packet){ exports.terminateWorker = function (instance) {
loadImage(packet.payload.image, function(img){ instance.worker.terminate();
packet.payload.image = img };
instance.worker.postMessage(packet)
})
}
exports.sendPacket = function sendPacket(instance, packet) {
loadImage(packet.payload.image, function (img) {
packet.payload.image = img;
instance.worker.postMessage(packet);
});
};
function loadImage(image, cb){ function loadImage(image, cb) {
if(typeof image === 'string'){ if (typeof image === 'string') {
if(/^\#/.test(image)){ if (/^\#/.test(image)) {
// element css selector // element css selector
return loadImage(document.querySelector(image), cb) return loadImage(document.querySelector(image), cb);
}else if(/(blob|data)\:/.test(image)){ } else if (/(blob|data)\:/.test(image)) {
// data url // data url
var im = new Image var im = new Image();
im.src = image; im.src = image;
im.onload = e => loadImage(im, cb); im.onload = function (e) {
return return loadImage(im, cb);
}else{ };
return;
} else {
var xhr = new XMLHttpRequest(); var xhr = new XMLHttpRequest();
xhr.open('GET', image, true) xhr.open('GET', image, true);
xhr.responseType = "blob"; xhr.responseType = "blob";
xhr.onload = e => loadImage(xhr.response, cb); xhr.onload = function (e) {
xhr.onerror = function(e){ return loadImage(xhr.response, cb);
if(/^https?:\/\//.test(image) && !/^https:\/\/crossorigin.me/.test(image)){ };
console.debug('Attempting to load image with CORS proxy') xhr.onerror = function (e) {
loadImage('https://crossorigin.me/' + image, cb) 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 };
xhr.send(null);
return;
} }
}else if(image instanceof File){ } else if (image instanceof File) {
// files // files
var fr = new FileReader() var fr = new FileReader();
fr.onload = e => loadImage(fr.result, cb); fr.onload = function (e) {
fr.readAsDataURL(image) return loadImage(fr.result, cb);
return };
}else if(image instanceof Blob){ fr.readAsDataURL(image);
return loadImage(URL.createObjectURL(image), cb) return;
}else if(image.getContext){ } else if (image instanceof Blob) {
return loadImage(URL.createObjectURL(image), cb);
} else if (image.getContext) {
// canvas element // canvas element
return loadImage(image.getContext('2d'), cb) return loadImage(image.getContext('2d'), cb);
}else if(image.tagName == "IMG" || image.tagName == "VIDEO"){ } else if (image.tagName == "IMG" || image.tagName == "VIDEO") {
// image element or video element // image element or video element
var c = document.createElement('canvas'); var c = document.createElement('canvas');
c.width = image.naturalWidth || image.videoWidth; c.width = image.naturalWidth || image.videoWidth;
c.height = image.naturalHeight || image.videoHeight; c.height = image.naturalHeight || image.videoHeight;
var ctx = c.getContext('2d'); var ctx = c.getContext('2d');
ctx.drawImage(image, 0, 0); ctx.drawImage(image, 0, 0);
return loadImage(ctx, cb) return loadImage(ctx, cb);
}else if(image.getImageData){ } else if (image.getImageData) {
// canvas context // canvas context
var data = image.getImageData(0, 0, image.canvas.width, image.canvas.height); var data = image.getImageData(0, 0, image.canvas.width, image.canvas.height);
return loadImage(data, cb) return loadImage(data, cb);
}else{ } else {
return cb(image) return cb(image);
} }
throw new Error('Missing return in loadImage cascade') throw new Error('Missing return in loadImage cascade');
} }
}).call(this,require('_process')) }).call(this,require('_process'))
},{"../../package.json":3,"_process":2}],5:[function(require,module,exports){ },{"../../package.json":3,"_process":2}],5:[function(require,module,exports){
"use strict";
// The result of dump.js is a big JSON tree // The result of dump.js is a big JSON tree
// which can be easily serialized (for instance // which can be easily serialized (for instance
// to be sent from a webworker to the main app // to be sent from a webworker to the main app
@ -421,228 +428,283 @@ function loadImage(image, cb){
// a (circular) DOM-like interface for walking // a (circular) DOM-like interface for walking
// through the data. // through the data.
module.exports = function circularize(page){ module.exports = function circularize(page) {
page.paragraphs = [] page.paragraphs = [];
page.lines = [] page.lines = [];
page.words = [] page.words = [];
page.symbols = [] page.symbols = [];
page.blocks.forEach(function(block){ page.blocks.forEach(function (block) {
block.page = page; block.page = page;
block.lines = [] block.lines = [];
block.words = [] block.words = [];
block.symbols = [] block.symbols = [];
block.paragraphs.forEach(function(para){ block.paragraphs.forEach(function (para) {
para.block = block; para.block = block;
para.page = page; para.page = page;
para.words = [] para.words = [];
para.symbols = [] para.symbols = [];
para.lines.forEach(function(line){ para.lines.forEach(function (line) {
line.paragraph = para; line.paragraph = para;
line.block = block; line.block = block;
line.page = page; line.page = page;
line.symbols = [] line.symbols = [];
line.words.forEach(function(word){ line.words.forEach(function (word) {
word.line = line; word.line = line;
word.paragraph = para; word.paragraph = para;
word.block = block; word.block = block;
word.page = page; word.page = page;
word.symbols.forEach(function(sym){ word.symbols.forEach(function (sym) {
sym.word = word; sym.word = word;
sym.line = line; sym.line = line;
sym.paragraph = para; sym.paragraph = para;
sym.block = block; sym.block = block;
sym.page = page; sym.page = page;
sym.line.symbols.push(sym) sym.line.symbols.push(sym);
sym.paragraph.symbols.push(sym) sym.paragraph.symbols.push(sym);
sym.block.symbols.push(sym) sym.block.symbols.push(sym);
sym.page.symbols.push(sym) sym.page.symbols.push(sym);
}) });
word.paragraph.words.push(word) word.paragraph.words.push(word);
word.block.words.push(word) word.block.words.push(word);
word.page.words.push(word) word.page.words.push(word);
}) });
line.block.lines.push(line) line.block.lines.push(line);
line.page.lines.push(line) line.page.lines.push(line);
}) });
para.page.paragraphs.push(para) para.page.paragraphs.push(para);
}) });
}) });
return page return page;
} };
},{}],6:[function(require,module,exports){ },{}],6:[function(require,module,exports){
const adapter = require('../node/index.js') 'use strict';
let jobCounter = 0; 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; }; }();
module.exports = class TesseractJob { function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
constructor(instance){
this.id = 'Job-' + (++jobCounter) + '-' + Math.random().toString(16).slice(3, 8) 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._instance = instance;
this._resolve = [] this._resolve = [];
this._reject = [] this._reject = [];
this._progress = [] this._progress = [];
this._finally = [] this._finally = [];
} }
then(resolve, reject){ _createClass(TesseractJob, [{
if(this._resolve.push){ key: 'then',
this._resolve.push(resolve) value: function then(resolve, reject) {
}else{ if (this._resolve.push) {
resolve(this._resolve) this._resolve.push(resolve);
} else {
resolve(this._resolve);
} }
if(reject) this.catch(reject); if (reject) this.catch(reject);
return this; return this;
} }
catch(reject){ }, {
if(this._reject.push){ key: 'catch',
this._reject.push(reject) value: function _catch(reject) {
}else{ if (this._reject.push) {
reject(this._reject) this._reject.push(reject);
} else {
reject(this._reject);
} }
return this; return this;
} }
progress(fn){ }, {
this._progress.push(fn) key: 'progress',
value: function progress(fn) {
this._progress.push(fn);
return this; return this;
} }
finally(fn) { }, {
this._finally.push(fn) key: 'finally',
value: function _finally(fn) {
this._finally.push(fn);
return this; return this;
} }
_send(action, payload){ }, {
key: '_send',
value: function _send(action, payload) {
adapter.sendPacket(this._instance, { adapter.sendPacket(this._instance, {
jobId: this.id, jobId: this.id,
action: action, action: action,
payload: payload payload: payload
}) });
} }
}, {
_handle(packet){ key: '_handle',
value: function _handle(packet) {
var data = packet.data; var data = packet.data;
let runFinallyCbs = false; var runFinallyCbs = false;
if(packet.status === 'resolve'){ if (packet.status === 'resolve') {
if(this._resolve.length === 0) console.log(data); if (this._resolve.length === 0) console.log(data);
this._resolve.forEach(fn => { this._resolve.forEach(function (fn) {
var ret = fn(data); var ret = fn(data);
if(ret && typeof ret.then == 'function'){ 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.') console.warn('TesseractJob instances do not chain like ES6 Promises. To convert it into a real promise, use Promise.resolve.');
} }
}) });
this._resolve = data; this._resolve = data;
this._instance._dequeue() this._instance._dequeue();
runFinallyCbs = true; runFinallyCbs = true;
}else if(packet.status === 'reject'){ } else if (packet.status === 'reject') {
if(this._reject.length === 0) console.error(data); if (this._reject.length === 0) console.error(data);
this._reject.forEach(fn => fn(data)) this._reject.forEach(function (fn) {
return fn(data);
});
this._reject = data; this._reject = data;
this._instance._dequeue() this._instance._dequeue();
runFinallyCbs = true; runFinallyCbs = true;
}else if(packet.status === 'progress'){ } else if (packet.status === 'progress') {
this._progress.forEach(fn => fn(data)) this._progress.forEach(function (fn) {
}else{ return fn(data);
console.warn('Message type unknown', packet.status) });
} else {
console.warn('Message type unknown', packet.status);
} }
if (runFinallyCbs) { if (runFinallyCbs) {
this._finally.forEach(fn => fn(data)); this._finally.forEach(function (fn) {
return fn(data);
});
} }
} }
} }]);
return TesseractJob;
}();
},{"../node/index.js":4}],7:[function(require,module,exports){ },{"../node/index.js":4}],7:[function(require,module,exports){
const adapter = require('./node/index.js') 'use strict';
const circularize = require('./common/circularize.js')
const TesseractJob = require('./common/job'); 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; }; }();
const objectAssign = require('object-assign');
const version = require('../package.json').version;
function create(workerOptions){ 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 objectAssign = require('object-assign');
var version = require('../package.json').version;
function create(workerOptions) {
workerOptions = workerOptions || {}; workerOptions = workerOptions || {};
var worker = new TesseractWorker(objectAssign({}, adapter.defaultOptions, workerOptions)) var worker = new TesseractWorker(objectAssign({}, adapter.defaultOptions, workerOptions));
worker.create = create; worker.create = create;
worker.version = version; worker.version = version;
return worker; return worker;
} }
class TesseractWorker { var TesseractWorker = function () {
constructor(workerOptions){ function TesseractWorker(workerOptions) {
_classCallCheck(this, TesseractWorker);
this.worker = null; this.worker = null;
this.workerOptions = workerOptions; this.workerOptions = workerOptions;
this._currentJob = null; this._currentJob = null;
this._queue = [] this._queue = [];
} }
recognize(image, options){ _createClass(TesseractWorker, [{
return this._delay(job => { key: 'recognize',
if(typeof options === 'string'){ value: function recognize(image, options) {
var _this = this;
return this._delay(function (job) {
if (typeof options === 'string') {
options = { lang: options }; options = { lang: options };
}else{ } else {
options = options || {} options = options || {};
options.lang = options.lang || 'eng'; options.lang = options.lang || 'eng';
} }
job._send('recognize', { image: image, options: options, workerOptions: this.workerOptions }) job._send('recognize', { image: image, options: options, workerOptions: _this.workerOptions });
}) });
}
detect(image, options){
options = options || {}
return this._delay(job => {
job._send('detect', { image: image, options: options, workerOptions: this.workerOptions })
})
} }
}, {
key: 'detect',
value: function detect(image, options) {
var _this2 = this;
terminate(){ options = options || {};
if(this.worker) adapter.terminateWorker(this); 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; this.worker = null;
} }
}, {
key: '_delay',
value: function _delay(fn) {
var _this3 = this;
_delay(fn){ if (!this.worker) this.worker = adapter.spawnWorker(this, this.workerOptions);
if(!this.worker) this.worker = adapter.spawnWorker(this, this.workerOptions);
var job = new TesseractJob(this); var job = new TesseractJob(this);
this._queue.push(e => { this._queue.push(function (e) {
this._queue.shift() _this3._queue.shift();
this._currentJob = job; _this3._currentJob = job;
fn(job) fn(job);
}) });
if(!this._currentJob) this._dequeue(); if (!this._currentJob) this._dequeue();
return job return job;
} }
}, {
_dequeue(){ key: '_dequeue',
value: function _dequeue() {
this._currentJob = null; this._currentJob = null;
if(this._queue.length > 0){ if (this._queue.length > 0) {
this._queue[0]() this._queue[0]();
} }
} }
}, {
key: '_recv',
value: function _recv(packet) {
_recv(packet){ if (packet.status === 'resolve' && packet.action === 'recognize') {
if(packet.status === 'resolve' && packet.action === 'recognize'){
packet.data = circularize(packet.data); packet.data = circularize(packet.data);
} }
if(this._currentJob.id === packet.jobId){ if (this._currentJob.id === packet.jobId) {
this._currentJob._handle(packet) this._currentJob._handle(packet);
}else{ } else {
console.warn('Job ID ' + packet.jobId + ' not known.') console.warn('Job ID ' + packet.jobId + ' not known.');
} }
} }
} }]);
return TesseractWorker;
}();
var DefaultTesseract = create();
var DefaultTesseract = create() module.exports = DefaultTesseract;
module.exports = DefaultTesseract
},{"../package.json":3,"./common/circularize.js":5,"./common/job":6,"./node/index.js":4,"object-assign":1}]},{},[7])(7) },{"../package.json":3,"./common/circularize.js":5,"./common/job":6,"./node/index.js":4,"object-assign":1}]},{},[7])(7)
}); });

360
dist/worker.js vendored
Unescape View File

@ -8375,7 +8375,9 @@ function extend() {
} }
},{"./has-keys":36,"object-keys":17}],38:[function(require,module,exports){ },{"./has-keys":36,"object-keys":17}],38:[function(require,module,exports){
const leveljs = require('level-js') 'use strict';
var leveljs = require('level-js');
// something about trying to store these language files in indexedDB // something about trying to store these language files in indexedDB
// causes iOS Safari to crash // causes iOS Safari to crash
@ -8383,35 +8385,38 @@ const leveljs = require('level-js')
var iOS = /iPad|iPhone|iPod/.test(navigator.userAgent); var iOS = /iPad|iPhone|iPod/.test(navigator.userAgent);
var noIDB = typeof indexedDB === 'undefined' || iOS; var noIDB = typeof indexedDB === 'undefined' || iOS;
var db = noIDB ? { open: (_, cb) => cb(true) } : leveljs('./tessdata2') var db = noIDB ? { open: function open(_, cb) {
return cb(true);
} } : leveljs('./tessdata2');
var langdata = require('../common/langdata.json') var langdata = require('../common/langdata.json');
module.exports = function getLanguageData(req, res, cb){ module.exports = function getLanguageData(req, res, cb) {
var lang = req.options.lang; var lang = req.options.lang;
function saveDataFile(data){ function saveDataFile(data) {
try { try {
db.put(lang, data, err => console.log('cached', lang, err)) db.put(lang, data, function (err) {
return console.log('cached', lang, err);
});
} finally { } finally {
cb(data) cb(data);
} }
} }
db.open({ compression: false }, err => { db.open({ compression: false }, function (err) {
if (err) return fetchLanguageData(req, res, cb); if (err) return fetchLanguageData(req, res, cb);
db.get(lang, (err, data) => { db.get(lang, function (err, data) {
if (err) return fetchLanguageData(req, res, saveDataFile); if (err) return fetchLanguageData(req, res, saveDataFile);
res.progress({ status: 'found in cache ' + lang + '.traineddata' }) res.progress({ status: 'found in cache ' + lang + '.traineddata' });
cb(data) cb(data);
}) });
}) });
} };
const ungzip = require('pako/lib/inflate.js').ungzip; var ungzip = require('pako/lib/inflate.js').ungzip;
function fetchLanguageData(req, res, cb){ function fetchLanguageData(req, res, cb) {
var lang = req.options.lang; var lang = req.options.lang;
var langfile = lang + '.traineddata.gz'; var langfile = lang + '.traineddata.gz';
var url = req.workerOptions.langPath + langfile; var url = req.workerOptions.langPath + langfile;
@ -8419,114 +8424,132 @@ function fetchLanguageData(req, res, cb){
var xhr = new XMLHttpRequest(); var xhr = new XMLHttpRequest();
xhr.open('GET', url, true); xhr.open('GET', url, true);
xhr.responseType = 'arraybuffer'; xhr.responseType = 'arraybuffer';
xhr.onerror = e => { xhr.onerror = function (e) {
xhr.onprogress = xhr.onload = null xhr.onprogress = xhr.onload = null;
cb(xhr, null) cb(xhr, null);
} };
xhr.onprogress = e => xhr.onprogress = function (e) {
res.progress({ return res.progress({
status: 'downloading ' + langfile, status: 'downloading ' + langfile,
loaded: e.loaded, loaded: e.loaded,
progress: Math.min(1, e.loaded / langdata[lang]) progress: Math.min(1, e.loaded / langdata[lang])
}); });
};
xhr.onload = e => { xhr.onload = function (e) {
if (!(xhr.status == 200 || (xhr.status == 0 && xhr.response))) return res.reject('Error downloading language ' + url); if (!(xhr.status == 200 || xhr.status == 0 && xhr.response)) return res.reject('Error downloading language ' + url);
res.progress({ status: 'unzipping ' + langfile, progress: 0 }) res.progress({ status: 'unzipping ' + langfile, progress: 0 });
// in case the gzips are already ungzipped or extra gzipped // in case the gzips are already ungzipped or extra gzipped
var response = new Uint8Array(xhr.response) var response = new Uint8Array(xhr.response);
try { try {
var n = 2; var n = 2;
while(response[0] == 0x1f && response[1] == 0x8b){ while (response[0] == 0x1f && response[1] == 0x8b) {
response = ungzip(response); response = ungzip(response);
res.progress({ status: 'unzipping ' + langfile, progress: 1 - 1 / (n++) }) res.progress({ status: 'unzipping ' + langfile, progress: 1 - 1 / n++ });
} }
} catch (err) { } catch (err) {
return res.reject('Error unzipping language file ' + langfile + '\n' + err.message) return res.reject('Error unzipping language file ' + langfile + '\n' + err.message);
} }
res.progress({ status: 'unzipping ' + langfile, progress: 1 }) res.progress({ status: 'unzipping ' + langfile, progress: 1 });
cb(response) cb(response);
} };
xhr.send() xhr.send();
} }
},{"../common/langdata.json":42,"level-js":13,"pako/lib/inflate.js":20}],39:[function(require,module,exports){ },{"../common/langdata.json":42,"level-js":13,"pako/lib/inflate.js":20}],39:[function(require,module,exports){
(function (global){ (function (process,global){
"use strict"; 'use strict';
var workerUtils = require('../common/worker.js') var workerUtils = require('../common/worker.js');
if (process.env.NODE_ENV === "development") {
console.debug('Using Development Worker');
}
global.addEventListener('message', function(e){ global.addEventListener('message', function (e) {
var packet = e.data; var packet = e.data;
workerUtils.dispatchHandlers(packet, obj => postMessage(obj)) workerUtils.dispatchHandlers(packet, function (obj) {
}) return postMessage(obj);
});
});
exports.getCore = function(req, res){ exports.getCore = function (req, res) {
if(!global.TesseractCore){ if (!global.TesseractCore) {
res.progress({ status: 'loading tesseract core' }) res.progress({ status: 'loading tesseract core', progress: 0 });
importScripts(req.workerOptions.tesseractPath) importScripts(req.workerOptions.corePath);
res.progress({ status: 'loaded tesseract core' }) res.progress({ status: 'loading tesseract core', progress: 1 });
} }
return TesseractCore return TesseractCore;
} };
exports.getLanguageData = require('./lang.js') exports.getLanguageData = require('./lang.js');
workerUtils.setAdapter(module.exports); workerUtils.setAdapter(module.exports);
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"../common/worker.js":43,"./lang.js":38}],40:[function(require,module,exports){ },{"../common/worker.js":43,"./lang.js":38,"_process":32}],40:[function(require,module,exports){
'use strict';
// This converts an image to grayscale // This converts an image to grayscale
module.exports = function desaturate(image){ module.exports = function desaturate(image) {
var width, height; var width, height;
if(image.data){ if (image.data) {
var src = image.data; var src = image.data;
width = image.width, width = image.width, height = image.height;
height = image.height;
var dst = new Uint8Array(width * height); var dst = new Uint8Array(width * height);
var srcLength = src.length | 0, srcLength_16 = (srcLength - 16) | 0; var srcLength = src.length | 0,
srcLength_16 = srcLength - 16 | 0;
for (var i = 0, j = 0; i <= srcLength_16; i += 16, j += 4) { for (var i = 0, j = 0; i <= srcLength_16; i += 16, j += 4) {
// convert to grayscale 4 pixels at a time; eveything with alpha gets put in front of 50% gray // convert to grayscale 4 pixels at a time; eveything with alpha gets put in front of 50% gray
dst[j] = (((src[i] * 77 + src[i+1] * 151 + src[i+2] * 28) * src[i+3]) + ((255-src[i+3]) << 15) + 32768) >> 16 dst[j] = (src[i] * 77 + src[i + 1] * 151 + src[i + 2] * 28) * src[i + 3] + (255 - src[i + 3] << 15) + 32768 >> 16;
dst[j+1] = (((src[i+4] * 77 + src[i+5] * 151 + src[i+6] * 28) * src[i+7]) + ((255-src[i+7]) << 15) + 32768) >> 16 dst[j + 1] = (src[i + 4] * 77 + src[i + 5] * 151 + src[i + 6] * 28) * src[i + 7] + (255 - src[i + 7] << 15) + 32768 >> 16;
dst[j+2] = (((src[i+8] * 77 + src[i+9] * 151 + src[i+10] * 28) * src[i+11]) + ((255-src[i+11]) << 15) + 32768) >> 16 dst[j + 2] = (src[i + 8] * 77 + src[i + 9] * 151 + src[i + 10] * 28) * src[i + 11] + (255 - src[i + 11] << 15) + 32768 >> 16;
dst[j+3] = (((src[i+12] * 77 + src[i+13] * 151 + src[i+14] * 28) * src[i+15]) + ((255-src[i+15]) << 15) + 32768) >> 16 dst[j + 3] = (src[i + 12] * 77 + src[i + 13] * 151 + src[i + 14] * 28) * src[i + 15] + (255 - src[i + 15] << 15) + 32768 >> 16;
}
for (; i < srcLength; i += 4, ++j) {
//finish up
dst[j] = (src[i] * 77 + src[i + 1] * 151 + src[i + 2] * 28) * src[i + 3] + (255 - src[i + 3] << 15) + 32768 >> 16;
}image = dst;
} else {
throw 'Invalid ImageData';
} }
for (; i < srcLength; i += 4, ++j) //finish up return image;
dst[j] = (((src[i] * 77 + src[i+1] * 151 + src[i+2] * 28) * src[i+3]) + ((255-src[i+3]) << 15) + 32768) >> 16 };
image = dst;
} else { throw 'Invalid ImageData' }
return image
}
},{}],41:[function(require,module,exports){ },{}],41:[function(require,module,exports){
module.exports = function DumpLiterallyEverything(Module, base){ 'use strict';
module.exports = function DumpLiterallyEverything(Module, base) {
var ri = base.GetIterator(); var ri = base.GetIterator();
var blocks = []; var blocks = [];
var block, para, textline, word, symbol; var block, para, textline, word, symbol;
function enumToString(value, prefix){ function enumToString(value, prefix) {
return (Object.keys(Module) return Object.keys(Module).filter(function (e) {
.filter(function(e){ return e.substr(0, prefix.length + 1) == prefix + '_' }) return e.substr(0, prefix.length + 1) == prefix + '_';
.filter(function(e){ return Module[e] === value }) }).filter(function (e) {
.map(function(e){ return e.slice(prefix.length + 1) })[0]) return Module[e] === value;
}).map(function (e) {
return e.slice(prefix.length + 1);
})[0];
} }
ri.Begin() ri.Begin();
do { do {
if(ri.IsAtBeginningOf(Module.RIL_BLOCK)){ if (ri.IsAtBeginningOf(Module.RIL_BLOCK)) {
var poly = ri.BlockPolygon(); var poly = ri.BlockPolygon();
var polygon = null; var polygon = null;
// BlockPolygon() returns null when automatic page segmentation is off // BlockPolygon() returns null when automatic page segmentation is off
if(Module.getPointer(poly) > 0){ if (Module.getPointer(poly) > 0) {
var n = poly.get_n(), var n = poly.get_n(),
px = poly.get_x(), px = poly.get_x(),
py = poly.get_y(), py = poly.get_y(),
polygon = []; polygon = [];
for(var i = 0; i < n; i++){ for (var i = 0; i < n; i++) {
polygon.push([px.getValue(i), py.getValue(i)]); polygon.push([px.getValue(i), py.getValue(i)]);
} }
Module._ptaDestroy(Module.getPointer(poly)); Module._ptaDestroy(Module.getPointer(poly));
@ -8542,10 +8565,10 @@ module.exports = function DumpLiterallyEverything(Module, base){
blocktype: enumToString(ri.BlockType(), 'PT'), blocktype: enumToString(ri.BlockType(), 'PT'),
polygon: polygon polygon: polygon
};
blocks.push(block);
} }
blocks.push(block) if (ri.IsAtBeginningOf(Module.RIL_PARA)) {
}
if(ri.IsAtBeginningOf(Module.RIL_PARA)){
para = { para = {
lines: [], lines: [],
@ -8555,10 +8578,10 @@ module.exports = function DumpLiterallyEverything(Module, base){
bbox: ri.getBoundingBox(Module.RIL_PARA), bbox: ri.getBoundingBox(Module.RIL_PARA),
is_ltr: !!ri.ParagraphIsLtr() is_ltr: !!ri.ParagraphIsLtr()
};
block.paragraphs.push(para);
} }
block.paragraphs.push(para) if (ri.IsAtBeginningOf(Module.RIL_TEXTLINE)) {
}
if(ri.IsAtBeginningOf(Module.RIL_TEXTLINE)){
textline = { textline = {
words: [], words: [],
@ -8566,10 +8589,10 @@ module.exports = function DumpLiterallyEverything(Module, base){
confidence: ri.Confidence(Module.RIL_TEXTLINE), confidence: ri.Confidence(Module.RIL_TEXTLINE),
baseline: ri.getBaseline(Module.RIL_TEXTLINE), baseline: ri.getBaseline(Module.RIL_TEXTLINE),
bbox: ri.getBoundingBox(Module.RIL_TEXTLINE) bbox: ri.getBoundingBox(Module.RIL_TEXTLINE)
};
para.lines.push(textline);
} }
para.lines.push(textline) if (ri.IsAtBeginningOf(Module.RIL_WORD)) {
}
if(ri.IsAtBeginningOf(Module.RIL_WORD)){
var fontInfo = ri.getWordFontAttributes(), var fontInfo = ri.getWordFontAttributes(),
wordDir = ri.WordDirection(); wordDir = ri.WordDirection();
word = { word = {
@ -8594,17 +8617,17 @@ module.exports = function DumpLiterallyEverything(Module, base){
is_smallcaps: fontInfo.is_smallcaps, is_smallcaps: fontInfo.is_smallcaps,
font_size: fontInfo.pointsize, font_size: fontInfo.pointsize,
font_id: fontInfo.font_id, font_id: fontInfo.font_id,
font_name: fontInfo.font_name, font_name: fontInfo.font_name
} };
var wc = new Module.WordChoiceIterator(ri); var wc = new Module.WordChoiceIterator(ri);
do { do {
word.choices.push({ word.choices.push({
text: wc.GetUTF8Text(), text: wc.GetUTF8Text(),
confidence: wc.Confidence() confidence: wc.Confidence()
}) });
} while (wc.Next()); } while (wc.Next());
Module.destroy(wc) Module.destroy(wc);
textline.words.push(word) textline.words.push(word);
} }
var image = null; var image = null;
@ -8612,7 +8635,7 @@ module.exports = function DumpLiterallyEverything(Module, base){
// var image = pix2array(pix); // var image = pix2array(pix);
// // for some reason it seems that things stop working if you destroy pics // // for some reason it seems that things stop working if you destroy pics
// Module._pixDestroy(Module.getPointer(pix)); // Module._pixDestroy(Module.getPointer(pix));
if(ri.IsAtBeginningOf(Module.RIL_SYMBOL)){ if (ri.IsAtBeginningOf(Module.RIL_SYMBOL)) {
symbol = { symbol = {
choices: [], choices: [],
image: image, image: image,
@ -8624,20 +8647,20 @@ module.exports = function DumpLiterallyEverything(Module, base){
is_superscript: !!ri.SymbolIsSuperscript(), is_superscript: !!ri.SymbolIsSuperscript(),
is_subscript: !!ri.SymbolIsSubscript(), is_subscript: !!ri.SymbolIsSubscript(),
is_dropcap: !!ri.SymbolIsDropcap(), is_dropcap: !!ri.SymbolIsDropcap()
} };
word.symbols.push(symbol) word.symbols.push(symbol);
var ci = new Module.ChoiceIterator(ri); var ci = new Module.ChoiceIterator(ri);
do { do {
symbol.choices.push({ symbol.choices.push({
text: ci.GetUTF8Text(), text: ci.GetUTF8Text(),
confidence: ci.Confidence() confidence: ci.Confidence()
}) });
} while (ci.Next()); } while (ci.Next());
Module.destroy(ci) Module.destroy(ci);
} }
} while (ri.Next(Module.RIL_SYMBOL)); } while (ri.Next(Module.RIL_SYMBOL));
Module.destroy(ri) Module.destroy(ri);
return { return {
text: base.GetUTF8Text(), text: base.GetUTF8Text(),
@ -8649,134 +8672,130 @@ module.exports = function DumpLiterallyEverything(Module, base){
psm: enumToString(base.GetPageSegMode(), 'PSM'), psm: enumToString(base.GetPageSegMode(), 'PSM'),
oem: enumToString(base.oem(), 'OEM'), oem: enumToString(base.oem(), 'OEM'),
version: base.Version(), version: base.Version()
} };
} };
// the generated HOCR is excessively indented, so // the generated HOCR is excessively indented, so
// we get rid of that indentation // we get rid of that indentation
function deindent(html){ function deindent(html) {
var lines = html.split('\n') var lines = html.split('\n');
if(lines[0].substring(0, 2) === " "){ if (lines[0].substring(0, 2) === " ") {
for (var i = 0; i < lines.length; i++) { for (var i = 0; i < lines.length; i++) {
if (lines[i].substring(0,2) === " ") { if (lines[i].substring(0, 2) === " ") {
lines[i] = lines[i].slice(2) lines[i] = lines[i].slice(2);
} }
}; };
} }
return lines.join('\n') return lines.join('\n');
} }
},{}],42:[function(require,module,exports){ },{}],42:[function(require,module,exports){
module.exports={"afr": 1079573, "ara": 1701536, "aze": 1420865, "bel": 1276820, "ben": 6772012, "bul": 1605615, "cat": 1652368, "ces": 1035441, "chi_sim": 17710414, "chi_tra": 24717749, "chr": 320649, "dan-frak": 677656, "dan": 1972936, "deu-frak": 822644, "deu": 991656, "ell": 859719, "eng": 9453554, "enm": 619254, "epo": 1241212, "equ": 821130, "est": 1905040, "eus": 1641190, "fin": 979418, "fra": 1376221, "frk": 5912963, "frm": 5147082, "glg": 1674938, "grc": 3012615, "heb": 1051501, "hin": 6590065, "hrv": 1926995, "hun": 3074473, "ind": 1874776, "isl": 1634041, "ita": 948593, "ita_old": 3436571, "jpn": 13507168, "kan": 4390317, "kor": 5353098, "lav": 1843944, "lit": 1779240, "mal": 5966263, "meme": 88453, "mkd": 1163087, "mlt": 1463001, "msa": 1665427, "nld": 1134708, "nor": 2191610, "osd": 4274649, "pol": 7024662, "por": 909359, "ron": 915680, "rus": 5969957, "slk-frak": 289885, "slk": 2217342, "slv": 1611338, "spa": 883170, "spa_old": 5647453, "sqi": 1667041, "srp": 1770244, "swa": 757916, "swe": 2451917, "tam": 3498763, "tel": 5795246, "tgl": 1496256, "tha": 3811136, "tur": 3563264, "ukr": 937566, "vie": 2195922} module.exports={"afr": 1079573, "ara": 1701536, "aze": 1420865, "bel": 1276820, "ben": 6772012, "bul": 1605615, "cat": 1652368, "ces": 1035441, "chi_sim": 17710414, "chi_tra": 24717749, "chr": 320649, "dan-frak": 677656, "dan": 1972936, "deu-frak": 822644, "deu": 991656, "ell": 859719, "eng": 9453554, "enm": 619254, "epo": 1241212, "equ": 821130, "est": 1905040, "eus": 1641190, "fin": 979418, "fra": 1376221, "frk": 5912963, "frm": 5147082, "glg": 1674938, "grc": 3012615, "heb": 1051501, "hin": 6590065, "hrv": 1926995, "hun": 3074473, "ind": 1874776, "isl": 1634041, "ita": 948593, "ita_old": 3436571, "jpn": 13507168, "kan": 4390317, "kor": 5353098, "lav": 1843944, "lit": 1779240, "mal": 5966263, "meme": 88453, "mkd": 1163087, "mlt": 1463001, "msa": 1665427, "nld": 1134708, "nor": 2191610, "osd": 4274649, "pol": 7024662, "por": 909359, "ron": 915680, "rus": 5969957, "slk-frak": 289885, "slk": 2217342, "slv": 1611338, "spa": 883170, "spa_old": 5647453, "sqi": 1667041, "srp": 1770244, "swa": 757916, "swe": 2451917, "tam": 3498763, "tel": 5795246, "tgl": 1496256, "tha": 3811136, "tur": 3563264, "ukr": 937566, "vie": 2195922}
},{}],43:[function(require,module,exports){ },{}],43:[function(require,module,exports){
'use strict';
var latestJob; var latestJob;
var Module; var Module;
var base; var base;
var adapter = {}; var adapter = {};
function dispatchHandlers(packet, send){ function dispatchHandlers(packet, send) {
function respond(status, data){ function respond(status, data) {
send({ send({
jobId: packet.jobId, jobId: packet.jobId,
status: status, status: status,
action: packet.action, action: packet.action,
data: data data: data
}) });
} }
respond.resolve = respond.bind(this, 'resolve') respond.resolve = respond.bind(this, 'resolve');
respond.reject = respond.bind(this, 'reject') respond.reject = respond.bind(this, 'reject');
respond.progress = respond.bind(this, 'progress') respond.progress = respond.bind(this, 'progress');
latestJob = respond; latestJob = respond;
try { try {
if(packet.action === 'recognize'){ if (packet.action === 'recognize') {
handleRecognize(packet.payload, respond) handleRecognize(packet.payload, respond);
}else if(packet.action === 'detect'){ } else if (packet.action === 'detect') {
handleDetect(packet.payload, respond) handleDetect(packet.payload, respond);
} }
} catch (err) { } catch (err) {
respond.reject(err) respond.reject(err);
} }
} }
exports.dispatchHandlers = dispatchHandlers; exports.dispatchHandlers = dispatchHandlers;
exports.setAdapter = function setAdapter(impl){ exports.setAdapter = function setAdapter(impl) {
adapter = impl; adapter = impl;
} };
function handleInit(req, res){ function handleInit(req, res) {
var MIN_MEMORY = 100663296; var MIN_MEMORY = 100663296;
if(['chi_sim', 'chi_tra', 'jpn'].indexOf(req.options.lang) != -1){ if (['chi_sim', 'chi_tra', 'jpn'].indexOf(req.options.lang) != -1) {
MIN_MEMORY = 167772160; MIN_MEMORY = 167772160;
} }
if(!Module || Module.TOTAL_MEMORY < MIN_MEMORY){ if (!Module || Module.TOTAL_MEMORY < MIN_MEMORY) {
var Core = adapter.getCore(req, res); var Core = adapter.getCore(req, res);
res.progress({ status: 'initializing tesseract', progress: 0 }) res.progress({ status: 'initializing tesseract', progress: 0 });
Module = Core({ Module = Core({
TOTAL_MEMORY: MIN_MEMORY, TOTAL_MEMORY: MIN_MEMORY,
TesseractProgress(percent){ TesseractProgress: function TesseractProgress(percent) {
latestJob.progress({ status: 'recognizing text', progress: Math.max(0, (percent-30)/70) }) latestJob.progress({ status: 'recognizing text', progress: Math.max(0, (percent - 30) / 70) });
}, },
onRuntimeInitialized() {} onRuntimeInitialized: function onRuntimeInitialized() {}
}) });
Module.FS_createPath("/", "tessdata", true, true) Module.FS_createPath("/", "tessdata", true, true);
base = new Module.TessBaseAPI() base = new Module.TessBaseAPI();
res.progress({ status: 'initializing tesseract', progress: 1 }) res.progress({ status: 'initializing tesseract', progress: 1 });
} }
} }
var dump = require('./dump.js');
var desaturate = require('./desaturate.js');
function setImage(Module, base, image) {
var dump = require('./dump.js')
var desaturate = require('./desaturate.js')
function setImage(Module, base, image){
var imgbin = desaturate(image), var imgbin = desaturate(image),
width = image.width, width = image.width,
height = image.height; height = image.height;
var ptr = Module.allocate(imgbin, 'i8', Module.ALLOC_NORMAL); var ptr = Module.allocate(imgbin, 'i8', Module.ALLOC_NORMAL);
base.SetImage(Module.wrapPointer(ptr), width, height, 1, width); base.SetImage(Module.wrapPointer(ptr), width, height, 1, width);
base.SetRectangle(0, 0, width, height) base.SetRectangle(0, 0, width, height);
return ptr; return ptr;
} }
function loadLanguage(req, res, cb){ function loadLanguage(req, res, cb) {
var lang = req.options.lang; var lang = req.options.lang;
if(!Module._loadedLanguages) Module._loadedLanguages = {}; if (!Module._loadedLanguages) Module._loadedLanguages = {};
if(lang in Module._loadedLanguages) return cb(); if (lang in Module._loadedLanguages) return cb();
adapter.getLanguageData(req, res, function(data){ adapter.getLanguageData(req, res, function (data) {
res.progress({ status: 'loading ' + lang + '.traineddata', progress: 0 }) res.progress({ status: 'loading ' + lang + '.traineddata', progress: 0 });
Module.FS_createDataFile('tessdata', lang + ".traineddata", data, true, false); Module.FS_createDataFile('tessdata', lang + ".traineddata", data, true, false);
Module._loadedLanguages[lang] = true; Module._loadedLanguages[lang] = true;
res.progress({ status: 'loading ' + lang + '.traineddata', progress: 1 }) res.progress({ status: 'loading ' + lang + '.traineddata', progress: 1 });
cb() cb();
}) });
} }
function handleRecognize(req, res) {
handleInit(req, res);
loadLanguage(req, res, function () {
function handleRecognize(req, res){
handleInit(req, res)
loadLanguage(req, res, function(){
var lang = req.options.lang; var lang = req.options.lang;
res.progress({ status: 'initializing api', progress: 0 }) res.progress({ status: 'initializing api', progress: 0 });
base.Init(null, lang) base.Init(null, lang);
res.progress({ status: 'initializing api', progress: 0.3 }) res.progress({ status: 'initializing api', progress: 0.3 });
var options = req.options; var options = req.options;
for (var option in options) { for (var option in options) {
@ -8785,42 +8804,41 @@ function handleRecognize(req, res){
} }
} }
res.progress({ status: 'initializing api', progress: 0.6 }) res.progress({ status: 'initializing api', progress: 0.6 });
var ptr = setImage(Module, base, req.image); var ptr = setImage(Module, base, req.image);
res.progress({ status: 'initializing api', progress: 1 }) res.progress({ status: 'initializing api', progress: 1 });
base.Recognize(null) base.Recognize(null);
var result = dump(Module, base) var result = dump(Module, base);
base.End(); base.End();
Module._free(ptr); Module._free(ptr);
res.resolve(result); res.resolve(result);
}) });
} }
function handleDetect(req, res) {
function handleDetect(req, res){ handleInit(req, res);
handleInit(req, res)
req.options.lang = 'osd'; req.options.lang = 'osd';
loadLanguage(req, res, function(){ loadLanguage(req, res, function () {
base.Init(null, 'osd') base.Init(null, 'osd');
base.SetPageSegMode(Module.PSM_OSD_ONLY) base.SetPageSegMode(Module.PSM_OSD_ONLY);
var ptr = setImage(Module, base, req.image); var ptr = setImage(Module, base, req.image);
var results = new Module.OSResults(); var results = new Module.OSResults();
var success = base.DetectOS(results); var success = base.DetectOS(results);
if(!success){ if (!success) {
base.End(); base.End();
Module._free(ptr); Module._free(ptr);
res.reject("failed to detect os") res.reject("failed to detect os");
} else { } else {
var charset = results.get_unicharset() var charset = results.get_unicharset();
var best = results.get_best_result() var best = results.get_best_result();
var oid = best.get_orientation_id(), var oid = best.get_orientation_id(),
sid = best.get_script_id(); sid = best.get_script_id();
@ -8830,14 +8848,14 @@ function handleDetect(req, res){
script_confidence: best.get_sconfidence(), script_confidence: best.get_sconfidence(),
orientation_degrees: [0, 270, 180, 90][oid], orientation_degrees: [0, 270, 180, 90][oid],
orientation_confidence: best.get_oconfidence() orientation_confidence: best.get_oconfidence()
} };
base.End(); base.End();
Module._free(ptr); Module._free(ptr);
res.resolve(result) res.resolve(result);
} }
}) });
} }
},{"./desaturate.js":40,"./dump.js":41}]},{},[39]); },{"./desaturate.js":40,"./dump.js":41}]},{},[39]);

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