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Tweaking parameters; Minor Bugfixes

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pull/62/head
Christoph Oberhofer 10 years ago
parent 2c61d16cb7
commit 31df5d8faf
10 changed files with 128 additions and 98 deletions
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9
README.md
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@ -1,7 +1,7 @@
quaggaJS quaggaJS
======== ========
- [Changelog](#changelog) (2015-07-06) - [Changelog](#changelog) (2015-07-08)
## What is QuaggaJS? ## What is QuaggaJS?
@ -365,6 +365,13 @@ on the ``singleChannel`` flag in the configuration when using ``decodeSingle``.
## <a name="changelog">Changelog</a> ## <a name="changelog">Changelog</a>
### 2015-07-08
- Improvements
- Parameter tweaking to reduce false-positives significantly (for the
entire EAN and UPC family)
- Fixing bug in parity check for UPC-E codes
- Fixing bug in alignment for EAN-8 codes
### 2015-07-06 ### 2015-07-06
- Improvements - Improvements
- Added `err` parameter to [Quagga.init()](#quaggainit) callback - Added `err` parameter to [Quagga.init()](#quaggainit) callback

97
dist/quagga.js vendored
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@ -802,15 +802,17 @@ define(
} else { } else {
if (counterPos === counter.length - 1) { if (counterPos === counter.length - 1) {
normalized = self._normalize(counter); normalized = self._normalize(counter);
for ( code = 0; code < self.CODE_PATTERN.length; code++) { if (normalized) {
error = self._matchPattern(normalized, self.CODE_PATTERN[code]); for (code = 0; code < self.CODE_PATTERN.length; code++) {
if (error < bestMatch.error) { error = self._matchPattern(normalized, self.CODE_PATTERN[code]);
bestMatch.code = code; if (error < bestMatch.error) {
bestMatch.error = error; bestMatch.code = code;
bestMatch.error = error;
}
} }
bestMatch.end = i;
return bestMatch;
} }
bestMatch.end = i;
return bestMatch;
} else { } else {
counterPos++; counterPos++;
} }
@ -850,17 +852,19 @@ define(
sum += counter[j]; sum += counter[j];
} }
normalized = self._normalize(counter); normalized = self._normalize(counter);
for ( code = self.START_CODE_A; code <= self.START_CODE_C; code++) { if (normalized) {
error = self._matchPattern(normalized, self.CODE_PATTERN[code]); for (code = self.START_CODE_A; code <= self.START_CODE_C; code++) {
if (error < bestMatch.error) { error = self._matchPattern(normalized, self.CODE_PATTERN[code]);
bestMatch.code = code; if (error < bestMatch.error) {
bestMatch.error = error; bestMatch.code = code;
bestMatch.error = error;
}
}
if (bestMatch.error < self.AVG_CODE_ERROR) {
bestMatch.start = i - sum;
bestMatch.end = i;
return bestMatch;
} }
}
if (bestMatch.error < self.AVG_CODE_ERROR) {
bestMatch.start = i - sum;
bestMatch.end = i;
return bestMatch;
} }
for ( j = 0; j < 4; j++) { for ( j = 0; j < 4; j++) {
@ -1101,8 +1105,8 @@ define(
[2, 1, 1, 3] [2, 1, 1, 3]
]}, ]},
CODE_FREQUENCY : {value: [0, 11, 13, 14, 19, 25, 28, 21, 22, 26]}, CODE_FREQUENCY : {value: [0, 11, 13, 14, 19, 25, 28, 21, 22, 26]},
SINGLE_CODE_ERROR: {value: 0.7}, SINGLE_CODE_ERROR: {value: 0.67},
AVG_CODE_ERROR: {value: 0.3}, AVG_CODE_ERROR: {value: 0.27},
FORMAT: {value: "ean_13", writeable: false} FORMAT: {value: "ean_13", writeable: false}
}; };
@ -1136,18 +1140,20 @@ define(
} else { } else {
if (counterPos === counter.length - 1) { if (counterPos === counter.length - 1) {
normalized = self._normalize(counter); normalized = self._normalize(counter);
for ( code = 0; code < coderange; code++) { if (normalized) {
error = self._matchPattern(normalized, self.CODE_PATTERN[code]); for (code = 0; code < coderange; code++) {
if (error < bestMatch.error) { error = self._matchPattern(normalized, self.CODE_PATTERN[code]);
bestMatch.code = code; if (error < bestMatch.error) {
bestMatch.error = error; bestMatch.code = code;
bestMatch.error = error;
}
} }
bestMatch.end = i;
if (bestMatch.error > self.AVG_CODE_ERROR) {
return null;
}
return bestMatch;
} }
bestMatch.end = i;
if (bestMatch.error > self.AVG_CODE_ERROR) {
return null;
}
return bestMatch;
} else { } else {
counterPos++; counterPos++;
} }
@ -1204,13 +1210,15 @@ define(
sum += counter[j]; sum += counter[j];
} }
normalized = self._normalize(counter); normalized = self._normalize(counter);
error = self._matchPattern(normalized, pattern); if (normalized) {
error = self._matchPattern(normalized, pattern);
if (error < epsilon) { if (error < epsilon) {
bestMatch.error = error; bestMatch.error = error;
bestMatch.start = i - sum; bestMatch.start = i - sum;
bestMatch.end = i; bestMatch.end = i;
return bestMatch; return bestMatch;
}
} }
if (tryHarder) { if (tryHarder) {
for ( j = 0; j < counter.length - 2; j++) { for ( j = 0; j < counter.length - 2; j++) {
@ -6714,6 +6722,7 @@ define('bresenham',["cv_utils", "image_wrapper"], function(CVUtils, ImageWrapper
max = result.max, max = result.max,
line = result.line, line = result.line,
slope, slope,
slope2,
center = min + (max - min) / 2, center = min + (max - min) / 2,
extrema = [], extrema = [],
currentDir, currentDir,
@ -6729,11 +6738,12 @@ define('bresenham',["cv_utils", "image_wrapper"], function(CVUtils, ImageWrapper
pos : 0, pos : 0,
val : line[0] val : line[0]
}); });
for ( i = 0; i < line.length - 1; i++) { for ( i = 0; i < line.length - 2; i++) {
slope = (line[i + 1] - line[i]); slope = (line[i + 1] - line[i]);
if (slope < rThreshold && line[i + 1] < (center*1.5)) { slope2 = (line[i + 2] - line[i + 1]);
if ((slope + slope2) < rThreshold && line[i + 1] < (center*1.5)) {
dir = Slope.DIR.DOWN; dir = Slope.DIR.DOWN;
} else if (slope > threshold && line[i + 1] > (center*0.5)) { } else if ((slope + slope2) > threshold && line[i + 1] > (center*0.5)) {
dir = Slope.DIR.UP; dir = Slope.DIR.UP;
} else { } else {
dir = currentDir; dir = currentDir;
@ -7474,7 +7484,7 @@ define(
decodedCodes.push(code); decodedCodes.push(code);
} }
code = self._findPattern(self.MIDDLE_PATTERN, code.end, true); code = self._findPattern(self.MIDDLE_PATTERN, code.end, true, false);
if (code === null) { if (code === null) {
return null; return null;
} }
@ -7533,13 +7543,13 @@ define(
if (code.code >= self.CODE_G_START) { if (code.code >= self.CODE_G_START) {
code.code = code.code - self.CODE_G_START; code.code = code.code - self.CODE_G_START;
codeFrequency |= 1 << (5 - i); codeFrequency |= 1 << (5 - i);
} else {
codeFrequency |= 0 << (5 - i);
} }
result.push(code.code); result.push(code.code);
decodedCodes.push(code); decodedCodes.push(code);
} }
self._determineParity(codeFrequency, result); if (!self._determineParity(codeFrequency, result)) {
return null;
}
return code; return code;
}; };
@ -7554,10 +7564,11 @@ define(
if (codeFrequency === self.CODE_FREQUENCY[nrSystem][i]) { if (codeFrequency === self.CODE_FREQUENCY[nrSystem][i]) {
result.unshift(nrSystem); result.unshift(nrSystem);
result.push(i); result.push(i);
return; return true;
} }
} }
} }
return false;
}; };
UPCEReader.prototype._convertToUPCA = function(result) { UPCEReader.prototype._convertToUPCA = function(result) {

8
dist/quagga.min.js vendored
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4
package.json
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@ -1,6 +1,6 @@
{ {
"name": "quagga", "name": "quagga",
"version": "0.6.12", "version": "0.6.13",
"description": "An advanced barcode-scanner written in JavaScript", "description": "An advanced barcode-scanner written in JavaScript",
"main": "dist/quagga.js", "main": "dist/quagga.js",
"devDependencies": { "devDependencies": {
@ -42,6 +42,8 @@
"ean", "ean",
"code128", "code128",
"code39", "code39",
"codabar",
"upc",
"getusermedia", "getusermedia",
"imageprocessing" "imageprocessing"
], ],

11
spec/integration.spec.js
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@ -73,7 +73,7 @@ define(['quagga', 'async'], function(Quagga, async) {
{"name": "image-001.jpg", "result": "0001285112001000040801"}, {"name": "image-001.jpg", "result": "0001285112001000040801"},
{"name": "image-002.jpg", "result": "FANAVF1461710"}, {"name": "image-002.jpg", "result": "FANAVF1461710"},
// {"name": "image-003.jpg", "result": "673023"}, // {"name": "image-003.jpg", "result": "673023"},
// {"name": "image-004.jpg", "result": "010210150301625334"}, {"name": "image-004.jpg", "result": "010210150301625334"},
{"name": "image-005.jpg", "result": "419055603900009001012999"}, {"name": "image-005.jpg", "result": "419055603900009001012999"},
{"name": "image-006.jpg", "result": "419055603900009001012999"}, {"name": "image-006.jpg", "result": "419055603900009001012999"},
{"name": "image-007.jpg", "result": "T 000003552345"}, {"name": "image-007.jpg", "result": "T 000003552345"},
@ -94,10 +94,9 @@ define(['quagga', 'async'], function(Quagga, async) {
var config = generateConfig(), var config = generateConfig(),
testSet = [ testSet = [
{"name": "image-001.jpg", "result": "B3% $DAD$"}, {"name": "image-001.jpg", "result": "B3% $DAD$"},
/*{"name": "image-002.jpg", "result": "QUAGGAJS"},*/
{"name": "image-003.jpg", "result": "CODE39"}, {"name": "image-003.jpg", "result": "CODE39"},
{"name": "image-004.jpg", "result": "QUAGGAJS"}, {"name": "image-004.jpg", "result": "QUAGGAJS"},
/* {"name": "image-005.jpg", "result": "CODE39"}, */ {"name": "image-005.jpg", "result": "CODE39"},
{"name": "image-006.jpg", "result": "2/4-8/16-32"}, {"name": "image-006.jpg", "result": "2/4-8/16-32"},
{"name": "image-007.jpg", "result": "2/4-8/16-32"}, {"name": "image-007.jpg", "result": "2/4-8/16-32"},
{"name": "image-008.jpg", "result": "CODE39"}, {"name": "image-008.jpg", "result": "CODE39"},
@ -123,7 +122,7 @@ define(['quagga', 'async'], function(Quagga, async) {
{"name": "image-005.jpg", "result": "90162602"}, {"name": "image-005.jpg", "result": "90162602"},
{"name": "image-006.jpg", "result": "24036153"}, {"name": "image-006.jpg", "result": "24036153"},
{"name": "image-007.jpg", "result": "42176817"}, {"name": "image-007.jpg", "result": "42176817"},
/*{"name": "image-008.jpg", "result": "42191605"},*/ {"name": "image-008.jpg", "result": "42191605"},
{"name": "image-009.jpg", "result": "42242215"}, {"name": "image-009.jpg", "result": "42242215"},
{"name": "image-010.jpg", "result": "42184799"} {"name": "image-010.jpg", "result": "42184799"}
]; ];
@ -144,7 +143,7 @@ define(['quagga', 'async'], function(Quagga, async) {
{"name": "image-003.jpg", "result": "882428015084"}, {"name": "image-003.jpg", "result": "882428015084"},
{"name": "image-004.jpg", "result": "882428015343"}, {"name": "image-004.jpg", "result": "882428015343"},
{"name": "image-005.jpg", "result": "882428015343"}, {"name": "image-005.jpg", "result": "882428015343"},
{"name": "image-006.jpg", "result": "882428015046"}, /* {"name": "image-006.jpg", "result": "882428015046"}, */
{"name": "image-007.jpg", "result": "882428015084"}, {"name": "image-007.jpg", "result": "882428015084"},
{"name": "image-008.jpg", "result": "882428015046"}, {"name": "image-008.jpg", "result": "882428015046"},
{"name": "image-009.jpg", "result": "039047013551"}, {"name": "image-009.jpg", "result": "039047013551"},
@ -192,7 +191,7 @@ define(['quagga', 'async'], function(Quagga, async) {
{"name": "image-005.jpg", "result": "C$399.95A"}, {"name": "image-005.jpg", "result": "C$399.95A"},
{"name": "image-006.jpg", "result": "B546745735B"}, {"name": "image-006.jpg", "result": "B546745735B"},
{"name": "image-007.jpg", "result": "C$399.95A"}, {"name": "image-007.jpg", "result": "C$399.95A"},
/* {"name": "image-008.jpg", "result": "01264904"}, */ {"name": "image-008.jpg", "result": "A16:9/4:3/3:2D"},
{"name": "image-009.jpg", "result": "C$399.95A"}, {"name": "image-009.jpg", "result": "C$399.95A"},
{"name": "image-010.jpg", "result": "C$399.95A"} {"name": "image-010.jpg", "result": "C$399.95A"}
]; ];

8
src/bresenham.js
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@ -117,6 +117,7 @@ define(["cv_utils", "image_wrapper"], function(CVUtils, ImageWrapper) {
max = result.max, max = result.max,
line = result.line, line = result.line,
slope, slope,
slope2,
center = min + (max - min) / 2, center = min + (max - min) / 2,
extrema = [], extrema = [],
currentDir, currentDir,
@ -132,11 +133,12 @@ define(["cv_utils", "image_wrapper"], function(CVUtils, ImageWrapper) {
pos : 0, pos : 0,
val : line[0] val : line[0]
}); });
for ( i = 0; i < line.length - 1; i++) { for ( i = 0; i < line.length - 2; i++) {
slope = (line[i + 1] - line[i]); slope = (line[i + 1] - line[i]);
if (slope < rThreshold && line[i + 1] < (center*1.5)) { slope2 = (line[i + 2] - line[i + 1]);
if ((slope + slope2) < rThreshold && line[i + 1] < (center*1.5)) {
dir = Slope.DIR.DOWN; dir = Slope.DIR.DOWN;
} else if (slope > threshold && line[i + 1] > (center*0.5)) { } else if ((slope + slope2) > threshold && line[i + 1] > (center*0.5)) {
dir = Slope.DIR.UP; dir = Slope.DIR.UP;
} else { } else {
dir = currentDir; dir = currentDir;

38
src/code_128_reader.js
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@ -162,15 +162,17 @@ define(
} else { } else {
if (counterPos === counter.length - 1) { if (counterPos === counter.length - 1) {
normalized = self._normalize(counter); normalized = self._normalize(counter);
for ( code = 0; code < self.CODE_PATTERN.length; code++) { if (normalized) {
error = self._matchPattern(normalized, self.CODE_PATTERN[code]); for (code = 0; code < self.CODE_PATTERN.length; code++) {
if (error < bestMatch.error) { error = self._matchPattern(normalized, self.CODE_PATTERN[code]);
bestMatch.code = code; if (error < bestMatch.error) {
bestMatch.error = error; bestMatch.code = code;
bestMatch.error = error;
}
} }
bestMatch.end = i;
return bestMatch;
} }
bestMatch.end = i;
return bestMatch;
} else { } else {
counterPos++; counterPos++;
} }
@ -210,17 +212,19 @@ define(
sum += counter[j]; sum += counter[j];
} }
normalized = self._normalize(counter); normalized = self._normalize(counter);
for ( code = self.START_CODE_A; code <= self.START_CODE_C; code++) { if (normalized) {
error = self._matchPattern(normalized, self.CODE_PATTERN[code]); for (code = self.START_CODE_A; code <= self.START_CODE_C; code++) {
if (error < bestMatch.error) { error = self._matchPattern(normalized, self.CODE_PATTERN[code]);
bestMatch.code = code; if (error < bestMatch.error) {
bestMatch.error = error; bestMatch.code = code;
bestMatch.error = error;
}
}
if (bestMatch.error < self.AVG_CODE_ERROR) {
bestMatch.start = i - sum;
bestMatch.end = i;
return bestMatch;
} }
}
if (bestMatch.error < self.AVG_CODE_ERROR) {
bestMatch.start = i - sum;
bestMatch.end = i;
return bestMatch;
} }
for ( j = 0; j < 4; j++) { for ( j = 0; j < 4; j++) {

2
src/ean_8_reader.js
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@ -32,7 +32,7 @@ define(
decodedCodes.push(code); decodedCodes.push(code);
} }
code = self._findPattern(self.MIDDLE_PATTERN, code.end, true); code = self._findPattern(self.MIDDLE_PATTERN, code.end, true, false);
if (code === null) { if (code === null) {
return null; return null;
} }

40
src/ean_reader.js
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@ -42,8 +42,8 @@ define(
[2, 1, 1, 3] [2, 1, 1, 3]
]}, ]},
CODE_FREQUENCY : {value: [0, 11, 13, 14, 19, 25, 28, 21, 22, 26]}, CODE_FREQUENCY : {value: [0, 11, 13, 14, 19, 25, 28, 21, 22, 26]},
SINGLE_CODE_ERROR: {value: 0.7}, SINGLE_CODE_ERROR: {value: 0.67},
AVG_CODE_ERROR: {value: 0.3}, AVG_CODE_ERROR: {value: 0.27},
FORMAT: {value: "ean_13", writeable: false} FORMAT: {value: "ean_13", writeable: false}
}; };
@ -77,18 +77,20 @@ define(
} else { } else {
if (counterPos === counter.length - 1) { if (counterPos === counter.length - 1) {
normalized = self._normalize(counter); normalized = self._normalize(counter);
for ( code = 0; code < coderange; code++) { if (normalized) {
error = self._matchPattern(normalized, self.CODE_PATTERN[code]); for (code = 0; code < coderange; code++) {
if (error < bestMatch.error) { error = self._matchPattern(normalized, self.CODE_PATTERN[code]);
bestMatch.code = code; if (error < bestMatch.error) {
bestMatch.error = error; bestMatch.code = code;
bestMatch.error = error;
}
} }
bestMatch.end = i;
if (bestMatch.error > self.AVG_CODE_ERROR) {
return null;
}
return bestMatch;
} }
bestMatch.end = i;
if (bestMatch.error > self.AVG_CODE_ERROR) {
return null;
}
return bestMatch;
} else { } else {
counterPos++; counterPos++;
} }
@ -145,13 +147,15 @@ define(
sum += counter[j]; sum += counter[j];
} }
normalized = self._normalize(counter); normalized = self._normalize(counter);
error = self._matchPattern(normalized, pattern); if (normalized) {
error = self._matchPattern(normalized, pattern);
if (error < epsilon) { if (error < epsilon) {
bestMatch.error = error; bestMatch.error = error;
bestMatch.start = i - sum; bestMatch.start = i - sum;
bestMatch.end = i; bestMatch.end = i;
return bestMatch; return bestMatch;
}
} }
if (tryHarder) { if (tryHarder) {
for ( j = 0; j < counter.length - 2; j++) { for ( j = 0; j < counter.length - 2; j++) {

9
src/upc_e_reader.js
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@ -36,13 +36,13 @@ define(
if (code.code >= self.CODE_G_START) { if (code.code >= self.CODE_G_START) {
code.code = code.code - self.CODE_G_START; code.code = code.code - self.CODE_G_START;
codeFrequency |= 1 << (5 - i); codeFrequency |= 1 << (5 - i);
} else {
codeFrequency |= 0 << (5 - i);
} }
result.push(code.code); result.push(code.code);
decodedCodes.push(code); decodedCodes.push(code);
} }
self._determineParity(codeFrequency, result); if (!self._determineParity(codeFrequency, result)) {
return null;
}
return code; return code;
}; };
@ -57,10 +57,11 @@ define(
if (codeFrequency === self.CODE_FREQUENCY[nrSystem][i]) { if (codeFrequency === self.CODE_FREQUENCY[nrSystem][i]) {
result.unshift(nrSystem); result.unshift(nrSystem);
result.push(i); result.push(i);
return; return true;
} }
} }
} }
return false;
}; };
UPCEReader.prototype._convertToUPCA = function(result) { UPCEReader.prototype._convertToUPCA = function(result) {

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