akira
/
tesseract.js
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Browse Source

changed to remote webworkers

pull/24/head
Guillermo 10 years ago
parent
3a47aed70f
commit
78d70d73d4
6 changed files with 12225 additions and 113 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Unified View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 3
      compile
  2. 13
      lib/Tesseract.js
  3. 165
      lib/worker.js
  4. 11988
      worker/worker.js
  5. 0
      worker_src/madeline.js
  6. 169
      worker_src/worker.js

3
compile
Unescape View File

@ -0,0 +1,3 @@
browserify worker_src/worker.js -o worker/wumbo.js
cat worker_src/madeline.js worker/wumbo.js > worker/worker.js
rm worker/wumbo.js

13
lib/Tesseract.js
Unescape View File

@ -34,6 +34,17 @@ Tesseract.recognize = function(image, options, callback){
} }
if(image.getImageData) image = image.getImageData(0, 0, image.canvas.width, image.canvas.height); if(image.getImageData) image = image.getImageData(0, 0, image.canvas.width, image.canvas.height);
var blob = new Blob(["\
importScripts('https://raw.githubusercontent.com/naptha/tesseract.js/master/lib/Tesseract.js');\
};"]);
var worker = new Worker(window.URL.createObjectURL(blob));
worker.onmessage = function(e){
alert(e.data == 'object' && 'Woot! your browser supports cross domain importScripts')
}
worker.postMessage(42)
var worker = new Worker('/lib/worker.js') var worker = new Worker('/lib/worker.js')
var progress = (function(){ var progress = (function(){
@ -56,7 +67,6 @@ Tesseract.recognize = function(image, options, callback){
} }
} }
worker.postMessage({image: image, lang: lang}) worker.postMessage({image: image, lang: lang})
console.log('callback')
} }
else { else {
return new Promise(function(resolve, reject){ return new Promise(function(resolve, reject){
@ -72,7 +82,6 @@ Tesseract.recognize = function(image, options, callback){
} }
} }
worker.postMessage({image: image, lang: lang, options: options}) worker.postMessage({image: image, lang: lang, options: options})
console.log('promise')
}) })
} }
} }

165
lib/worker.js
Unescape View File

@ -8634,21 +8634,7 @@ module.exports = ZStream;
importScripts('madeline.js') importScripts('madeline.js')
var leveljs = require('level-js') var leveljs = require('level-js')
// var levelup = require('levelup') // var levelup = require('levelup')
var db = leveljs('./tessdata', function(){ var db = leveljs('./tessdata')
})
// // 2) put a key & value
// db.put('name2', 'LevelUP', function (err) {
// if (err) return console.log('Ooops!', err) // some kind of I/O error
// // 3) fetch by key
// db.get('name', function (err, value) {
// if (err) return console.log('Ooops!', err) // likely the key was not found
// console.log('my name is' + value)
// })
// })
var filesizes = {"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} var filesizes = {"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}
@ -8657,14 +8643,17 @@ var pako = require('pako')
var recognize = (function createTesseractInstance(){ var recognize = (function createTesseractInstance(){
var Module = Tesseract304({ var Module = Tesseract304({
TOTAL_MEMORY: 90e6, TOTAL_MEMORY: 6*16777216, //must be a multiple of 10 megabytes
TesseractProgress: function(percent){ TesseractProgress: function(percent){
postMessage({ postMessage({
'progress': { 'progress': {
'recognized': percent/100 'recognized': Math.max(0,(percent-30)/70)
} }
}) })
} }//,
// onRuntimeInitialized: function(){
// console.log('wau')
// }
}) })
var base = new Module.TessBaseAPI() var base = new Module.TessBaseAPI()
@ -8678,7 +8667,11 @@ var recognize = (function createTesseractInstance(){
var downloadlang = function(shouldcache){ var downloadlang = function(shouldcache){
postMessage({ postMessage({
'progress': lang+' not found in cache, downloading' 'progress': {
'loaded_lang_model': 0,
cached: false,
requesting: true
}
}) })
var xhr = new XMLHttpRequest(); var xhr = new XMLHttpRequest();
xhr.open('GET', 'https://cdn.rawgit.com/naptha/tessdata/gh-pages/3.02/'+lang+'.traineddata.gz', true); xhr.open('GET', 'https://cdn.rawgit.com/naptha/tessdata/gh-pages/3.02/'+lang+'.traineddata.gz', true);
@ -8687,7 +8680,8 @@ var recognize = (function createTesseractInstance(){
xhr.onprogress = function(e){ xhr.onprogress = function(e){
postMessage({ postMessage({
'progress': { 'progress': {
'loaded_lang_model': e.loaded/filesizes[lang] 'loaded_lang_model': e.loaded/filesizes[lang],
cached: false
} }
}) })
} }
@ -8736,7 +8730,10 @@ var recognize = (function createTesseractInstance(){
value = pako.inflate(value) value = pako.inflate(value)
postMessage({ postMessage({
'progress': lang+' found in cache, length '+ value.length 'progress': {
loaded_lang_model:1,
cached: true
}
}) })
Module.FS_createDataFile('tessdata', lang +".traineddata", value, true, false); Module.FS_createDataFile('tessdata', lang +".traineddata", value, true, false);
@ -8749,6 +8746,66 @@ var recognize = (function createTesseractInstance(){
} }
} }
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
}
function DumpLiterallyEverything(){ function DumpLiterallyEverything(){
var ri = base.GetIterator(); var ri = base.GetIterator();
var blocks = []; var blocks = [];
@ -8761,6 +8818,7 @@ var recognize = (function createTesseractInstance(){
.map(function(e){ return e.slice(prefix.length + 1) })[0]) .map(function(e){ return e.slice(prefix.length + 1) })[0])
} }
ri.Begin()
do { do {
if(ri.IsAtBeginningOf(Module.RIL_BLOCK)){ if(ri.IsAtBeginningOf(Module.RIL_BLOCK)){
var poly = ri.BlockPolygon(); var poly = ri.BlockPolygon();
@ -8857,29 +8915,30 @@ var recognize = (function createTesseractInstance(){
// 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)){
symbol = {
choices: [],
image: image,
symbol = { text: ri.GetUTF8Text(Module.RIL_SYMBOL),
choices: [], confidence: ri.Confidence(Module.RIL_SYMBOL),
image: image, baseline: ri.getBaseline(Module.RIL_SYMBOL),
bbox: ri.getBoundingBox(Module.RIL_SYMBOL),
text: ri.GetUTF8Text(Module.RIL_SYMBOL),
confidence: ri.Confidence(Module.RIL_SYMBOL),
baseline: ri.getBaseline(Module.RIL_SYMBOL),
bbox: ri.getBoundingBox(Module.RIL_SYMBOL),
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)
var ci = new Module.ChoiceIterator(ri);
do {
symbol.choices.push({
text: ci.GetUTF8Text(),
confidence: ci.Confidence()
})
} while (ci.Next());
Module.destroy(ci)
} }
word.symbols.push(symbol)
var ci = new Module.ChoiceIterator(ri);
do {
symbol.choices.push({
text: ci.GetUTF8Text(),
confidence: ci.Confidence()
})
} while (ci.Next());
Module.destroy(ci)
} while (ri.Next(Module.RIL_SYMBOL)); } while (ri.Next(Module.RIL_SYMBOL));
Module.destroy(ri) Module.destroy(ri)
@ -8904,22 +8963,19 @@ var recognize = (function createTesseractInstance(){
width = image.width, height = image.height; width = image.width, 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;
var coeff_r = 4899, coeff_g = 9617, coeff_b = 1868;
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; // convert to grayscale 4 pixels at a time; eveything with alpha get put in front of 50% gray
// add 8192 = 1<<13 so for int n, float k >= .5, ((n + k)*(1<<14) >> 14) = 1 + ((n)*(1<<14) >> 14) 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+3] //(((src[i] * coeff_r + src[i+1] * coeff_g + src[i+2] * coeff_b + 8192) >> 14) * src[i+3]) >> 8 + 255 - src[i+3]; 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+3]//(((src[i+4] * coeff_r + src[i+5] * coeff_g + src[i+6] * coeff_b + 8192) >> 14) * src[i+3]) >> 8 + 255 - src[i+3]; 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+3]//(((src[i+8] * coeff_r + src[i+9] * coeff_g + src[i+10] * coeff_b + 8192) >> 14) * src[i+3]) >> 8 + 255 - src[i+3]; 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+3]//(((src[i+12] * coeff_r + src[i+13] * coeff_g + src[i+14] * coeff_b + 8192) >> 14) * src[i+3]) >> 8 + 255 - src[i+3];
} }
for (; i < srcLength; i += 4, ++j) //finish up for (; i < srcLength; i += 4, ++j) //finish up
dst[j] = (src[i] * coeff_r + src[i+1] * coeff_g + src[i+2] * coeff_b + 8192) >> 14; 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; image = dst;
// for(var i = 0; i < image.length; i++) image[i] = image[i] > 128;
} }
else { else {
throw 'Expected ImageData' throw 'Expected ImageData'
@ -8952,8 +9008,9 @@ var recognize = (function createTesseractInstance(){
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)
base.GetUTF8Text() // base.GetUTF8Text()
var everything = DumpLiterallyEverything() base.Recognize(null)
var everything = circularize(DumpLiterallyEverything())
base.End(); base.End();
Module._free(ptr); Module._free(ptr);
cb(null, everything) cb(null, everything)

11988
worker/worker.js
View File

File diff suppressed because one or more lines are too long

0
lib/madeline.js → worker_src/madeline.js
Unescape View File

169
worker_src/worker.js
Unescape View File

@ -1,21 +1,5 @@
importScripts('madeline.js') var db = (require('level-js'))('./tessdata')
var leveljs = require('level-js') // var db = leveljs('./tessdata')
// var levelup = require('levelup')
var db = leveljs('./tessdata', function(){
})
// // 2) put a key & value
// db.put('name2', 'LevelUP', function (err) {
// if (err) return console.log('Ooops!', err) // some kind of I/O error
// // 3) fetch by key
// db.get('name', function (err, value) {
// if (err) return console.log('Ooops!', err) // likely the key was not found
// console.log('my name is' + value)
// })
// })
var filesizes = {"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} var filesizes = {"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}
@ -24,14 +8,17 @@ var pako = require('pako')
var recognize = (function createTesseractInstance(){ var recognize = (function createTesseractInstance(){
var Module = Tesseract304({ var Module = Tesseract304({
TOTAL_MEMORY: 90e6, TOTAL_MEMORY: 6*16777216, //must be a multiple of 10 megabytes
TesseractProgress: function(percent){ TesseractProgress: function(percent){
postMessage({ postMessage({
'progress': { 'progress': {
'recognized': percent/100 'recognized': Math.max(0,(percent-30)/70)
} }
}) })
} }//,
// onRuntimeInitialized: function(){
// console.log('wau')
// }
}) })
var base = new Module.TessBaseAPI() var base = new Module.TessBaseAPI()
@ -45,7 +32,11 @@ var recognize = (function createTesseractInstance(){
var downloadlang = function(shouldcache){ var downloadlang = function(shouldcache){
postMessage({ postMessage({
'progress': lang+' not found in cache, downloading' 'progress': {
'loaded_lang_model': 0,
cached: false,
requesting: true
}
}) })
var xhr = new XMLHttpRequest(); var xhr = new XMLHttpRequest();
xhr.open('GET', 'https://cdn.rawgit.com/naptha/tessdata/gh-pages/3.02/'+lang+'.traineddata.gz', true); xhr.open('GET', 'https://cdn.rawgit.com/naptha/tessdata/gh-pages/3.02/'+lang+'.traineddata.gz', true);
@ -54,7 +45,8 @@ var recognize = (function createTesseractInstance(){
xhr.onprogress = function(e){ xhr.onprogress = function(e){
postMessage({ postMessage({
'progress': { 'progress': {
'loaded_lang_model': e.loaded/filesizes[lang] 'loaded_lang_model': e.loaded/filesizes[lang],
cached: false
} }
}) })
} }
@ -103,7 +95,10 @@ var recognize = (function createTesseractInstance(){
value = pako.inflate(value) value = pako.inflate(value)
postMessage({ postMessage({
'progress': lang+' found in cache, length '+ value.length 'progress': {
loaded_lang_model:1,
cached: true
}
}) })
Module.FS_createDataFile('tessdata', lang +".traineddata", value, true, false); Module.FS_createDataFile('tessdata', lang +".traineddata", value, true, false);
@ -116,6 +111,66 @@ var recognize = (function createTesseractInstance(){
} }
} }
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
}
function DumpLiterallyEverything(){ function DumpLiterallyEverything(){
var ri = base.GetIterator(); var ri = base.GetIterator();
var blocks = []; var blocks = [];
@ -128,6 +183,7 @@ var recognize = (function createTesseractInstance(){
.map(function(e){ return e.slice(prefix.length + 1) })[0]) .map(function(e){ return e.slice(prefix.length + 1) })[0])
} }
ri.Begin()
do { do {
if(ri.IsAtBeginningOf(Module.RIL_BLOCK)){ if(ri.IsAtBeginningOf(Module.RIL_BLOCK)){
var poly = ri.BlockPolygon(); var poly = ri.BlockPolygon();
@ -224,29 +280,30 @@ var recognize = (function createTesseractInstance(){
// 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)){
symbol = {
choices: [],
image: image,
symbol = { text: ri.GetUTF8Text(Module.RIL_SYMBOL),
choices: [], confidence: ri.Confidence(Module.RIL_SYMBOL),
image: image, baseline: ri.getBaseline(Module.RIL_SYMBOL),
bbox: ri.getBoundingBox(Module.RIL_SYMBOL),
text: ri.GetUTF8Text(Module.RIL_SYMBOL),
confidence: ri.Confidence(Module.RIL_SYMBOL),
baseline: ri.getBaseline(Module.RIL_SYMBOL),
bbox: ri.getBoundingBox(Module.RIL_SYMBOL),
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)
var ci = new Module.ChoiceIterator(ri);
do {
symbol.choices.push({
text: ci.GetUTF8Text(),
confidence: ci.Confidence()
})
} while (ci.Next());
Module.destroy(ci)
} }
word.symbols.push(symbol)
var ci = new Module.ChoiceIterator(ri);
do {
symbol.choices.push({
text: ci.GetUTF8Text(),
confidence: ci.Confidence()
})
} while (ci.Next());
Module.destroy(ci)
} while (ri.Next(Module.RIL_SYMBOL)); } while (ri.Next(Module.RIL_SYMBOL));
Module.destroy(ri) Module.destroy(ri)
@ -271,22 +328,19 @@ var recognize = (function createTesseractInstance(){
width = image.width, height = image.height; width = image.width, 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;
var coeff_r = 4899, coeff_g = 9617, coeff_b = 1868;
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; // convert to grayscale 4 pixels at a time; eveything with alpha get put in front of 50% gray
// add 8192 = 1<<13 so for int n, float k >= .5, ((n + k)*(1<<14) >> 14) = 1 + ((n)*(1<<14) >> 14) 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+3] //(((src[i] * coeff_r + src[i+1] * coeff_g + src[i+2] * coeff_b + 8192) >> 14) * src[i+3]) >> 8 + 255 - src[i+3]; 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+3]//(((src[i+4] * coeff_r + src[i+5] * coeff_g + src[i+6] * coeff_b + 8192) >> 14) * src[i+3]) >> 8 + 255 - src[i+3]; 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+3]//(((src[i+8] * coeff_r + src[i+9] * coeff_g + src[i+10] * coeff_b + 8192) >> 14) * src[i+3]) >> 8 + 255 - src[i+3]; 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+3]//(((src[i+12] * coeff_r + src[i+13] * coeff_g + src[i+14] * coeff_b + 8192) >> 14) * src[i+3]) >> 8 + 255 - src[i+3];
} }
for (; i < srcLength; i += 4, ++j) //finish up for (; i < srcLength; i += 4, ++j) //finish up
dst[j] = (src[i] * coeff_r + src[i+1] * coeff_g + src[i+2] * coeff_b + 8192) >> 14; 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; image = dst;
// for(var i = 0; i < image.length; i++) image[i] = image[i] > 128;
} }
else { else {
throw 'Expected ImageData' throw 'Expected ImageData'
@ -319,8 +373,9 @@ var recognize = (function createTesseractInstance(){
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)
base.GetUTF8Text() // base.GetUTF8Text()
var everything = DumpLiterallyEverything() base.Recognize(null)
var everything = circularize(DumpLiterallyEverything())
base.End(); base.End();
Module._free(ptr); Module._free(ptr);
cb(null, everything) cb(null, everything)

Write Preview
Loading…
Cancel
Save