UnknownObject/quaggaJS
1
0
Fork 0
mirror of https://github.com/serratus/quaggaJS.git synced 2026-08-13 05:31:37 +08:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #19 from serratus/issue-18

Browse Source 
Add support for Code 39 barcodes
This commit is contained in:
Christoph Oberhofer
2015-03-04 22:38:13 +01:00
parent 3c4a108a4a 6f02116663
commit 58a85ee3f1
19 changed files with 478 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files
README.md
+6 -1
View File
@@ -1,7 +1,7 @@
quaggaJS
========
- [Changelog](#changelog) (2015-01-21)
- [Changelog](#changelog) (2015-03-04)
QuaggaJS is a barcode-scanner entirely written in JavaScript supporting real-time localization and decoding of
various types of barcodes such as __EAN__ and __CODE128__. The library is also capable of using `getUserMedia` to get direct
@@ -262,6 +262,10 @@ In case you want to take a deeper dive into the inner workings of Quagga, get to
## <a name="changelog">Changelog</a>
### 2015-03-04
- Features
- Added support for [Code 39][code39_wiki] barcodes
### 2015-01-21
- Features
- Added support for web-worker (using 4 workers as default, can be changed through `config.numOfWorkers`)
@@ -283,3 +287,4 @@ In the course of implementing web-workers some breaking changes were introduced
[chaiUrl]: http://chaijs.com/
[mochaUrl]: https://github.com/mochajs/mocha
[karmaUrl]: http://karma-runner.github.io/
[code39_wiki]: http://en.wikipedia.org/wiki/Code_39
dist/quagga.js
Vendored
+235 -5
View File
@@ -470,10 +470,11 @@ define(
return error;
};
BarcodeReader.prototype._nextSet = function(line) {
BarcodeReader.prototype._nextSet = function(line, offset) {
var i;
for (i = 0; i < line.length; i++) {
offset = offset || 0;
for (i = offset; i < line.length; i++) {
if (line[i]) {
return i;
}
@@ -597,6 +598,18 @@ define(
return result;
};
BarcodeReader.prototype._matchRange = function(start, end, value) {
var i;
start = start < 0 ? 0 : start;
for (i = start; i < end; i++) {
if (this._row[i] !== value) {
return false;
}
}
return true;
};
BarcodeReader.DIRECTION = {
FORWARD : 1,
REVERSE : -1
@@ -4180,6 +4193,16 @@ define('array_helper',[],function() {
}
}
return max;
},
sum: function(arr) {
var length = arr.length,
sum = 0;
while(length--) {
sum += arr[length];
}
return sum;
}
};
});
@@ -6416,12 +6439,213 @@ define('bresenham',[],function() {
/* jshint undef: true, unused: true, browser:true, devel: true */
/* global define */
define('barcode_decoder',["bresenham", "image_debug", 'code_128_reader', 'ean_reader'], function(Bresenham, ImageDebug, Code128Reader, EANReader) {
define(
'code_39_reader',[
"./barcode_reader",
"./array_helper"
],
function(BarcodeReader, ArrayHelper) {
function Code39Reader() {
BarcodeReader.call(this);
}
var properties = {
ALPHABETH_STRING: {value: "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. *$/+%"},
ALPHABET: {value: [48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 45, 46, 32, 42, 36, 47, 43, 37]},
CHARACTER_ENCODINGS: {value: [0x034, 0x121, 0x061, 0x160, 0x031, 0x130, 0x070, 0x025, 0x124, 0x064, 0x109, 0x049, 0x148, 0x019, 0x118, 0x058, 0x00D, 0x10C, 0x04C, 0x01C, 0x103, 0x043, 0x142, 0x013, 0x112, 0x052, 0x007, 0x106, 0x046, 0x016, 0x181, 0x0C1, 0x1C0, 0x091, 0x190, 0x0D0, 0x085, 0x184, 0x0C4, 0x094, 0x0A8, 0x0A2, 0x08A, 0x02A]},
ASTERISK: {value: 0x094}
};
Code39Reader.prototype = Object.create(BarcodeReader.prototype, properties);
Code39Reader.prototype.constructor = Code39Reader;
Code39Reader.prototype._toCounters = function(start, counter) {
var self = this,
numCounters = counter.length,
end = self._row.length,
isWhite = !self._row[start],
i,
counterPos = 0;
ArrayHelper.init(counter, 0);
for ( i = start; i < end; i++) {
if (self._row[i] ^ isWhite) {
counter[counterPos]++;
} else {
counterPos++;
if (counterPos === numCounters) {
break;
} else {
counter[counterPos] = 1;
isWhite = !isWhite;
}
}
}
return counter;
};
Code39Reader.prototype._decode = function() {
var self = this,
counters = [0,0,0,0,0,0,0,0,0],
result = [],
start = self._findStart(),
decodedChar,
lastStart,
pattern,
nextStart;
if (!start) {
return null;
}
nextStart = self._nextSet(self._row, start.end);
do {
counters = self._toCounters(nextStart, counters);
pattern = self._toPattern(counters);
if (pattern < 0) {
return null;
}
decodedChar = self._patternToChar(pattern);
result.push(decodedChar);
lastStart = nextStart;
nextStart += ArrayHelper.sum(counters);
nextStart = self._nextSet(self._row, nextStart);
} while(decodedChar !== '*');
result.pop();
return {
code : result.join(""),
start : start.start,
end : nextStart,
startInfo : start,
decodedCodes : result
};
};
Code39Reader.prototype._patternToChar = function(pattern) {
var i,
self = this;
for (i = 0; i < self.CHARACTER_ENCODINGS.length; i++) {
if (self.CHARACTER_ENCODINGS[i] === pattern) {
return String.fromCharCode(self.ALPHABET[i]);
}
}
};
Code39Reader.prototype._findNextWidth = function(counters, current) {
var i,
minWidth = Number.MAX_VALUE;
for (i = 0; i < counters.length; i++) {
if (counters[i] < minWidth && counters[i] > current) {
minWidth = counters[i];
}
}
return minWidth;
};
Code39Reader.prototype._toPattern = function(counters) {
var numCounters = counters.length,
maxNarrowWidth = 0,
numWideBars = numCounters,
wideBarWidth = 0,
self = this,
pattern,
i;
while(numWideBars > 3) {
maxNarrowWidth = self._findNextWidth(counters, maxNarrowWidth);
numWideBars = 0;
pattern = 0;
for (i = 0; i < numCounters; i++) {
if (counters[i] > maxNarrowWidth) {
pattern |= 1 << (numCounters - 1 - i);
numWideBars++;
wideBarWidth += counters[i];
}
}
if (numWideBars === 3) {
for (i = 0; i < numCounters && numWideBars > 0; i++) {
if (counters[i] > maxNarrowWidth) {
numWideBars--;
if ((counters[i] * 3) >= wideBarWidth) {
return -1;
}
}
}
return pattern;
}
}
return -1;
};
Code39Reader.prototype._findStart = function() {
var self = this,
offset = self._nextSet(self._row),
patternStart = offset,
counter = [0,0,0,0,0,0,0,0,0],
counterPos = 0,
isWhite = false,
i,
j,
whiteSpaceMustStart;
for ( i = offset; i < self._row.length; i++) {
if (self._row[i] ^ isWhite) {
counter[counterPos]++;
} else {
if (counterPos === counter.length - 1) {
// find start pattern
if (self._toPattern(counter) === self.ASTERISK) {
whiteSpaceMustStart = Math.floor(Math.max(0, patternStart - ((i - patternStart) / 4)));
if (self._matchRange(whiteSpaceMustStart, patternStart, 0)) {
return {
start: patternStart,
end: i
};
}
}
patternStart += counter[0] + counter[1];
for ( j = 0; j < 7; j++) {
counter[j] = counter[j + 2];
}
counter[7] = 0;
counter[8] = 0;
counterPos--;
} else {
counterPos++;
}
counter[counterPos] = 1;
isWhite = !isWhite;
}
}
return null;
};
return (Code39Reader);
}
);
/* jshint undef: true, unused: true, browser:true, devel: true */
/* global define */
define('barcode_decoder',["bresenham", "image_debug", 'code_128_reader', 'ean_reader', 'code_39_reader'], function(Bresenham, ImageDebug, Code128Reader, EANReader, Code39Reader) {
var readers = {
code_128_reader: Code128Reader,
ean_reader: EANReader
ean_reader: EANReader,
code_39_reader: Code39Reader
};
var BarcodeDecoder = {
create : function(config, inputImageWrapper) {
@@ -6967,7 +7191,7 @@ define('camera_access',["html_utils"], function(HtmlUtils) {
}
/**
* Tries to attach the camer-stream to a given video-element
* Tries to attach the camera-stream to a given video-element
* and calls the callback function when the content is ready
* @param {Object} constraints
* @param {Object} video
@@ -7001,6 +7225,12 @@ define('camera_access',["html_utils"], function(HtmlUtils) {
});
}
/**
* Normalizes the incoming constraints to satisfy the current browser
* @param config
* @param cb Callback which is called whenever constraints are created
* @returns {*}
*/
function normalizeConstraints(config, cb) {
var constraints = {
audio: false,
example/live_w_locator.html
+2
View File
@@ -33,6 +33,8 @@
<input type="radio" name="reader" value="code_128" checked />
<label>EAN</label>
<input type="radio" name="reader" value="ean" />
<label>Code39</label>
<input type="radio" name="reader" value="code_39" />
</fieldset>
<br clear="all" />
</div>
example/static_images.html
+4 -2
View File
@@ -31,8 +31,10 @@
<div class="controls">
<button class="next">Next</button>
<fieldset class="reader-group">
<label>Code39</label>
<input type="radio" name="reader" value="code_39" checked />
<label>Code128</label>
<input type="radio" name="reader" value="code_128" checked />
<input type="radio" name="reader" value="code_128" />
<label>EAN</label>
<input type="radio" name="reader" value="ean" />
</fieldset>
@@ -41,7 +43,7 @@
<ul class="thumbnails"></ul>
</div>
<div id="interactive" class="viewport"></div>
<div id="debug"></div>
<div id="debug" class="detection"></div>
</section>
<footer>
<p>
example/static_images.js
+1 -1
View File
@@ -16,7 +16,7 @@ $(function() {
});
},
config: {
reader: "code_128",
reader: "code_39",
length: 10
},
attachListeners: function() {
src/array_helper.js
+10
View File
@@ -71,6 +71,16 @@ define(function() {
}
}
return max;
},
sum: function(arr) {
var length = arr.length,
sum = 0;
while(length--) {
sum += arr[length];
}
return sum;
}
};
});
src/barcode_decoder.js
+3 -2
View File
@@ -1,12 +1,13 @@
/* jshint undef: true, unused: true, browser:true, devel: true */
/* global define */
define(["bresenham", "image_debug", 'code_128_reader', 'ean_reader'], function(Bresenham, ImageDebug, Code128Reader, EANReader) {
define(["bresenham", "image_debug", 'code_128_reader', 'ean_reader', 'code_39_reader'], function(Bresenham, ImageDebug, Code128Reader, EANReader, Code39Reader) {
"use strict";
var readers = {
code_128_reader: Code128Reader,
ean_reader: EANReader
ean_reader: EANReader,
code_39_reader: Code39Reader
};
var BarcodeDecoder = {
create : function(config, inputImageWrapper) {
src/barcode_reader.js
+15 -2
View File
@@ -34,10 +34,11 @@ define(
return error;
};
BarcodeReader.prototype._nextSet = function(line) {
BarcodeReader.prototype._nextSet = function(line, offset) {
var i;
for (i = 0; i < line.length; i++) {
offset = offset || 0;
for (i = offset; i < line.length; i++) {
if (line[i]) {
return i;
}
@@ -161,6 +162,18 @@ define(
return result;
};
BarcodeReader.prototype._matchRange = function(start, end, value) {
var i;
start = start < 0 ? 0 : start;
for (i = start; i < end; i++) {
if (this._row[i] !== value) {
return false;
}
}
return true;
};
BarcodeReader.DIRECTION = {
FORWARD : 1,
REVERSE : -1
src/code_39_reader.js
+200
View File
@@ -0,0 +1,200 @@
/* jshint undef: true, unused: true, browser:true, devel: true */
/* global define */
define(
[
"./barcode_reader",
"./array_helper"
],
function(BarcodeReader, ArrayHelper) {
"use strict";
function Code39Reader() {
BarcodeReader.call(this);
}
var properties = {
ALPHABETH_STRING: {value: "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. *$/+%"},
ALPHABET: {value: [48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 45, 46, 32, 42, 36, 47, 43, 37]},
CHARACTER_ENCODINGS: {value: [0x034, 0x121, 0x061, 0x160, 0x031, 0x130, 0x070, 0x025, 0x124, 0x064, 0x109, 0x049, 0x148, 0x019, 0x118, 0x058, 0x00D, 0x10C, 0x04C, 0x01C, 0x103, 0x043, 0x142, 0x013, 0x112, 0x052, 0x007, 0x106, 0x046, 0x016, 0x181, 0x0C1, 0x1C0, 0x091, 0x190, 0x0D0, 0x085, 0x184, 0x0C4, 0x094, 0x0A8, 0x0A2, 0x08A, 0x02A]},
ASTERISK: {value: 0x094}
};
Code39Reader.prototype = Object.create(BarcodeReader.prototype, properties);
Code39Reader.prototype.constructor = Code39Reader;
Code39Reader.prototype._toCounters = function(start, counter) {
var self = this,
numCounters = counter.length,
end = self._row.length,
isWhite = !self._row[start],
i,
counterPos = 0;
ArrayHelper.init(counter, 0);
for ( i = start; i < end; i++) {
if (self._row[i] ^ isWhite) {
counter[counterPos]++;
} else {
counterPos++;
if (counterPos === numCounters) {
break;
} else {
counter[counterPos] = 1;
isWhite = !isWhite;
}
}
}
return counter;
};
Code39Reader.prototype._decode = function() {
var self = this,
counters = [0,0,0,0,0,0,0,0,0],
result = [],
start = self._findStart(),
decodedChar,
lastStart,
pattern,
nextStart;
if (!start) {
return null;
}
nextStart = self._nextSet(self._row, start.end);
do {
counters = self._toCounters(nextStart, counters);
pattern = self._toPattern(counters);
if (pattern < 0) {
return null;
}
decodedChar = self._patternToChar(pattern);
result.push(decodedChar);
lastStart = nextStart;
nextStart += ArrayHelper.sum(counters);
nextStart = self._nextSet(self._row, nextStart);
} while(decodedChar !== '*');
result.pop();
return {
code : result.join(""),
start : start.start,
end : nextStart,
startInfo : start,
decodedCodes : result
};
};
Code39Reader.prototype._patternToChar = function(pattern) {
var i,
self = this;
for (i = 0; i < self.CHARACTER_ENCODINGS.length; i++) {
if (self.CHARACTER_ENCODINGS[i] === pattern) {
return String.fromCharCode(self.ALPHABET[i]);
}
}
};
Code39Reader.prototype._findNextWidth = function(counters, current) {
var i,
minWidth = Number.MAX_VALUE;
for (i = 0; i < counters.length; i++) {
if (counters[i] < minWidth && counters[i] > current) {
minWidth = counters[i];
}
}
return minWidth;
};
Code39Reader.prototype._toPattern = function(counters) {
var numCounters = counters.length,
maxNarrowWidth = 0,
numWideBars = numCounters,
wideBarWidth = 0,
self = this,
pattern,
i;
while(numWideBars > 3) {
maxNarrowWidth = self._findNextWidth(counters, maxNarrowWidth);
numWideBars = 0;
pattern = 0;
for (i = 0; i < numCounters; i++) {
if (counters[i] > maxNarrowWidth) {
pattern |= 1 << (numCounters - 1 - i);
numWideBars++;
wideBarWidth += counters[i];
}
}
if (numWideBars === 3) {
for (i = 0; i < numCounters && numWideBars > 0; i++) {
if (counters[i] > maxNarrowWidth) {
numWideBars--;
if ((counters[i] * 3) >= wideBarWidth) {
return -1;
}
}
}
return pattern;
}
}
return -1;
};
Code39Reader.prototype._findStart = function() {
var self = this,
offset = self._nextSet(self._row),
patternStart = offset,
counter = [0,0,0,0,0,0,0,0,0],
counterPos = 0,
isWhite = false,
i,
j,
whiteSpaceMustStart;
for ( i = offset; i < self._row.length; i++) {
if (self._row[i] ^ isWhite) {
counter[counterPos]++;
} else {
if (counterPos === counter.length - 1) {
// find start pattern
if (self._toPattern(counter) === self.ASTERISK) {
whiteSpaceMustStart = Math.floor(Math.max(0, patternStart - ((i - patternStart) / 4)));
if (self._matchRange(whiteSpaceMustStart, patternStart, 0)) {
return {
start: patternStart,
end: i
};
}
}
patternStart += counter[0] + counter[1];
for ( j = 0; j < 7; j++) {
counter[j] = counter[j + 2];
}
counter[7] = 0;
counter[8] = 0;
counterPos--;
} else {
counterPos++;
}
counter[counterPos] = 1;
isWhite = !isWhite;
}
}
return null;
};
return (Code39Reader);
}
);
test/fixtures/code_39/image-001.jpg
Vendored
BIN
View File
Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 84 KiB

test/fixtures/code_39/image-002.jpg
Vendored
BIN
View File
Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 82 KiB

test/fixtures/code_39/image-003.jpg
Vendored
BIN
View File
Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 70 KiB

test/fixtures/code_39/image-004.jpg
Vendored
BIN
View File
Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 67 KiB

test/fixtures/code_39/image-005.jpg
Vendored
BIN
View File
Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 73 KiB

test/fixtures/code_39/image-006.jpg
Vendored
BIN
View File
Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 83 KiB

test/fixtures/code_39/image-007.jpg
Vendored
BIN
View File
Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 82 KiB

test/fixtures/code_39/image-008.jpg
Vendored
BIN
View File
Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 64 KiB

test/fixtures/code_39/image-009.jpg
Vendored
BIN
View File
Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 79 KiB

test/fixtures/code_39/image-010.jpg
Vendored
BIN
View File
Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 62 KiB