mirror of
https://github.com/serratus/quaggaJS.git
synced 2026-08-12 21:21:42 +08:00
Initial commit for I2of5 reader; Relates to #49
This commit is contained in:
Christoph Oberhofer
Vendored
+1290
-999
File diff suppressed because it is too large
Load Diff
Vendored
+5
-4
File diff suppressed because one or more lines are too long
@@ -116,12 +116,13 @@ define(['quagga'], function(Quagga) {
|
||||
singleChannel: false
|
||||
},
|
||||
locator: {
|
||||
patchSize: "medium",
|
||||
halfSample: true
|
||||
patchSize: "large",
|
||||
halfSample: true,
|
||||
showCanvas: true
|
||||
},
|
||||
numOfWorkers: 0,
|
||||
decoder: {
|
||||
readers: ["code_128_reader"],
|
||||
readers: ["i2of5_reader"],
|
||||
showFrequency: true,
|
||||
showPattern: true
|
||||
},
|
||||
|
||||
@@ -11,7 +11,8 @@ define([
|
||||
'codabar_reader',
|
||||
'upc_reader',
|
||||
'ean_8_reader',
|
||||
'upc_e_reader'
|
||||
'upc_e_reader',
|
||||
'i2of5_reader'
|
||||
], function(
|
||||
Bresenham,
|
||||
ImageDebug,
|
||||
@@ -22,7 +23,8 @@ define([
|
||||
CodabarReader,
|
||||
UPCReader,
|
||||
EAN8Reader,
|
||||
UPCEReader) {
|
||||
UPCEReader,
|
||||
I2of5Reader) {
|
||||
"use strict";
|
||||
|
||||
var readers = {
|
||||
@@ -33,7 +35,8 @@ define([
|
||||
code_39_vin_reader: Code39VINReader,
|
||||
codabar_reader: CodabarReader,
|
||||
upc_reader: UPCReader,
|
||||
upc_e_reader: UPCEReader
|
||||
upc_e_reader: UPCEReader,
|
||||
i2of5_reader: I2of5Reader
|
||||
};
|
||||
var BarcodeDecoder = {
|
||||
create : function(config, inputImageWrapper) {
|
||||
|
||||
@@ -184,6 +184,29 @@ define(
|
||||
return true;
|
||||
};
|
||||
|
||||
BarcodeReader.prototype._fillCounters = function(offset, end, isWhite) {
|
||||
var self = this,
|
||||
counterPos = 0,
|
||||
i,
|
||||
counters = [];
|
||||
|
||||
isWhite = (typeof isWhite !== 'undefined') ? isWhite : true;
|
||||
offset = (typeof offset !== 'undefined') ? offset : self._nextUnset(self._row);
|
||||
end = end || self._row.length;
|
||||
|
||||
counters[counterPos] = 0;
|
||||
for (i = offset; i < end; i++) {
|
||||
if (self._row[i] ^ isWhite) {
|
||||
counters[counterPos]++;
|
||||
} else {
|
||||
counterPos++;
|
||||
counters[counterPos] = 1;
|
||||
isWhite = !isWhite;
|
||||
}
|
||||
}
|
||||
return counters;
|
||||
};
|
||||
|
||||
Object.defineProperty(BarcodeReader.prototype, "FORMAT", {
|
||||
value: 'unknown',
|
||||
writeable: false
|
||||
|
||||
+1
-21
@@ -36,7 +36,7 @@ define(
|
||||
nextStart,
|
||||
end;
|
||||
|
||||
self._fillCounters();
|
||||
this._counters = self._fillCounters();
|
||||
start = self._findStart();
|
||||
if (!start) {
|
||||
return null;
|
||||
@@ -186,26 +186,6 @@ define(
|
||||
return true;
|
||||
};
|
||||
|
||||
CodabarReader.prototype._fillCounters = function() {
|
||||
var self = this,
|
||||
counterPos = 0,
|
||||
isWhite = true,
|
||||
offset = self._nextUnset(self._row),
|
||||
i;
|
||||
|
||||
self._counters.length = 0;
|
||||
self._counters[counterPos] = 0;
|
||||
for (i = offset; i < self._row.length; i++) {
|
||||
if (self._row[i] ^ isWhite) {
|
||||
this._counters[counterPos]++;
|
||||
} else {
|
||||
counterPos++;
|
||||
this._counters[counterPos] = 1;
|
||||
isWhite = !isWhite;
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
CodabarReader.prototype._patternToChar = function(pattern) {
|
||||
var i,
|
||||
self = this;
|
||||
|
||||
@@ -0,0 +1,293 @@
|
||||
/* jshint undef: true, unused: true, browser:true, devel: true */
|
||||
/* global define */
|
||||
|
||||
define(
|
||||
[
|
||||
"./barcode_reader"
|
||||
],
|
||||
function(BarcodeReader) {
|
||||
"use strict";
|
||||
|
||||
function I2of5Reader(opts) {
|
||||
BarcodeReader.call(this, opts);
|
||||
}
|
||||
|
||||
var N = 1,
|
||||
W = 3,
|
||||
properties = {
|
||||
MODULO : {value: 10},
|
||||
START_PATTERN : {value: [N*2.5, N*2.5, N*2.5, N*2.5]},
|
||||
STOP_PATTERN : {value: [N*2, N*2, W*2]},
|
||||
CODE_PATTERN : {value: [
|
||||
[N, N, W, W, N],
|
||||
[W, N, N, N, W],
|
||||
[N, W, N, N, W],
|
||||
[W, W, N, N, N],
|
||||
[N, N, W, N, W],
|
||||
[W, N, W, N, N],
|
||||
[N, W, W, N, N],
|
||||
[N, N, N, W, W],
|
||||
[W, N, N, W, N],
|
||||
[N, W, N, W, N]
|
||||
]},
|
||||
SINGLE_CODE_ERROR: {value: 1},
|
||||
AVG_CODE_ERROR: {value: 0.38},
|
||||
FORMAT: {value: "i2of5", writeable: false}
|
||||
};
|
||||
|
||||
I2of5Reader.prototype = Object.create(BarcodeReader.prototype, properties);
|
||||
I2of5Reader.prototype.constructor = I2of5Reader;
|
||||
|
||||
I2of5Reader.prototype._findPattern = function(pattern, offset) {
|
||||
var counter = [],
|
||||
self = this,
|
||||
i,
|
||||
counterPos = 0,
|
||||
bestMatch = {
|
||||
error : Number.MAX_VALUE,
|
||||
code : -1,
|
||||
start : 0,
|
||||
end : 0
|
||||
},
|
||||
error,
|
||||
j,
|
||||
sum,
|
||||
normalized,
|
||||
isWhite = false,
|
||||
epsilon = self.AVG_CODE_ERROR;
|
||||
|
||||
if (!offset) {
|
||||
offset = self._nextSet(self._row);
|
||||
}
|
||||
|
||||
for ( i = 0; i < pattern.length; i++) {
|
||||
counter[i] = 0;
|
||||
}
|
||||
|
||||
for ( i = offset; i < self._row.length; i++) {
|
||||
if (self._row[i] ^ isWhite) {
|
||||
counter[counterPos]++;
|
||||
} else {
|
||||
if (counterPos === counter.length - 1) {
|
||||
sum = 0;
|
||||
for ( j = 0; j < counter.length; j++) {
|
||||
sum += counter[j];
|
||||
}
|
||||
normalized = self._normalize(counter);
|
||||
if (normalized) {
|
||||
error = self._matchPattern(normalized, pattern);
|
||||
|
||||
if (error < epsilon) {
|
||||
bestMatch.error = error;
|
||||
bestMatch.start = i - sum;
|
||||
bestMatch.end = i;
|
||||
return bestMatch;
|
||||
}
|
||||
}
|
||||
for ( j = 0; j < counter.length - 2; j++) {
|
||||
counter[j] = counter[j + 2];
|
||||
}
|
||||
counter[counter.length - 2] = 0;
|
||||
counter[counter.length - 1] = 0;
|
||||
counterPos--;
|
||||
} else {
|
||||
counterPos++;
|
||||
}
|
||||
counter[counterPos] = 1;
|
||||
isWhite = !isWhite;
|
||||
}
|
||||
}
|
||||
return null;
|
||||
};
|
||||
|
||||
I2of5Reader.prototype._findStart = function() {
|
||||
var self = this,
|
||||
leadingWhitespaceStart,
|
||||
offset = self._nextSet(self._row),
|
||||
startInfo;
|
||||
|
||||
while(!startInfo) {
|
||||
startInfo = self._findPattern(self.START_PATTERN, offset);
|
||||
if (!startInfo) {
|
||||
return null;
|
||||
}
|
||||
leadingWhitespaceStart = startInfo.start - (startInfo.end - startInfo.start);
|
||||
if (leadingWhitespaceStart >= 0) {
|
||||
if (self._matchRange(leadingWhitespaceStart, startInfo.start, 0)) {
|
||||
startInfo.narrowBarWidth = Math.floor((startInfo.end - startInfo.start) / 4);
|
||||
return startInfo;
|
||||
}
|
||||
}
|
||||
offset = startInfo.end;
|
||||
startInfo = null;
|
||||
}
|
||||
};
|
||||
|
||||
I2of5Reader.prototype._verifyTrailingWhitespace = function(endInfo) {
|
||||
var self = this,
|
||||
trailingWhitespaceEnd;
|
||||
|
||||
trailingWhitespaceEnd = endInfo.end + (endInfo.end - endInfo.start);
|
||||
if (trailingWhitespaceEnd < self._row.length) {
|
||||
if (self._matchRange(endInfo.end, trailingWhitespaceEnd, 0)) {
|
||||
return endInfo;
|
||||
}
|
||||
}
|
||||
return null;
|
||||
};
|
||||
|
||||
I2of5Reader.prototype._findEnd = function() {
|
||||
var self = this,
|
||||
endInfo,
|
||||
tmp;
|
||||
|
||||
self._row.reverse();
|
||||
endInfo = self._findPattern(self.STOP_PATTERN);
|
||||
self._row.reverse();
|
||||
|
||||
if (endInfo === null) {
|
||||
return null;
|
||||
}
|
||||
|
||||
// reverse numbers
|
||||
tmp = endInfo.start;
|
||||
endInfo.start = self._row.length - endInfo.end;
|
||||
endInfo.end = self._row.length - tmp;
|
||||
|
||||
return endInfo !== null ? self._verifyTrailingWhitespace(endInfo) : null;
|
||||
};
|
||||
|
||||
I2of5Reader.prototype._decodePair = function(counterPair) {
|
||||
var i,
|
||||
code,
|
||||
codes = [],
|
||||
self = this;
|
||||
|
||||
for (i = 0; i < counterPair.length; i++) {
|
||||
code = self._decodeCode(counterPair[i]);
|
||||
if (!code) {
|
||||
return null;
|
||||
}
|
||||
codes.push(code);
|
||||
}
|
||||
return codes;
|
||||
};
|
||||
|
||||
I2of5Reader.prototype._decodeCode = function(counter) {
|
||||
var j,
|
||||
self = this,
|
||||
sum = 0,
|
||||
normalized,
|
||||
error,
|
||||
epsilon = self.AVG_CODE_ERROR,
|
||||
code,
|
||||
bestMatch = {
|
||||
error : Number.MAX_VALUE,
|
||||
code : -1,
|
||||
start : 0,
|
||||
end : 0
|
||||
};
|
||||
|
||||
for ( j = 0; j < counter.length; j++) {
|
||||
sum += counter[j];
|
||||
}
|
||||
normalized = self._normalize(counter);
|
||||
if (normalized) {
|
||||
for (code = 0; code < self.CODE_PATTERN.length; code++) {
|
||||
error = self._matchPattern(normalized, self.CODE_PATTERN[code]);
|
||||
if (error < bestMatch.error) {
|
||||
bestMatch.code = code;
|
||||
bestMatch.error = error;
|
||||
}
|
||||
}
|
||||
if (bestMatch.error < epsilon) {
|
||||
return bestMatch;
|
||||
}
|
||||
}
|
||||
return null;
|
||||
};
|
||||
|
||||
I2of5Reader.prototype._decodePayload = function(counters, result, decodedCodes) {
|
||||
var i,
|
||||
self = this,
|
||||
pos = 0,
|
||||
counterLength = counters.length,
|
||||
counterPair = [[0, 0, 0, 0, 0], [0, 0, 0, 0, 0]],
|
||||
codes;
|
||||
|
||||
while (pos < counterLength) {
|
||||
for (i = 0; i < 5; i++) {
|
||||
counterPair[0][i] = counters[pos];
|
||||
counterPair[1][i] = counters[pos + 1];
|
||||
pos += 2;
|
||||
}
|
||||
codes = self._decodePair(counterPair);
|
||||
if (!codes) {
|
||||
return null;
|
||||
}
|
||||
for (i = 0; i < codes.length; i++) {
|
||||
result.push(codes[i].code + "");
|
||||
decodedCodes.push(codes[i]);
|
||||
}
|
||||
}
|
||||
return codes;
|
||||
};
|
||||
|
||||
I2of5Reader.prototype._verifyCounterLength = function(counters) {
|
||||
return (counters.length % 10 === 0);
|
||||
};
|
||||
|
||||
I2of5Reader.prototype._decode = function() {
|
||||
var startInfo,
|
||||
endInfo,
|
||||
self = this,
|
||||
code,
|
||||
result = [],
|
||||
decodedCodes = [],
|
||||
counters;
|
||||
|
||||
startInfo = self._findStart();
|
||||
if (!startInfo) {
|
||||
return null;
|
||||
}
|
||||
|
||||
endInfo = self._findEnd();
|
||||
if (!endInfo) {
|
||||
return null;
|
||||
}
|
||||
console.log(startInfo);
|
||||
console.log(endInfo);
|
||||
|
||||
code = {
|
||||
code : startInfo.code,
|
||||
start : startInfo.start,
|
||||
end : startInfo.end
|
||||
};
|
||||
decodedCodes.push(code);
|
||||
|
||||
counters = self._fillCounters(startInfo.end, endInfo.start, false);
|
||||
if (!self._verifyCounterLength(counters)) {
|
||||
return null;
|
||||
}
|
||||
code = self._decodePayload(counters, result, decodedCodes);
|
||||
if (!code) {
|
||||
return null;
|
||||
}
|
||||
|
||||
// Checksum
|
||||
if (!self._checksum(result)) {
|
||||
return null;
|
||||
}
|
||||
|
||||
return {
|
||||
code : result.join(""),
|
||||
start : startInfo.start,
|
||||
end : code.end,
|
||||
startInfo : startInfo,
|
||||
decodedCodes : decodedCodes
|
||||
};
|
||||
};
|
||||
|
||||
return (I2of5Reader);
|
||||
}
|
||||
);
|
||||
+1
-9
@@ -3,8 +3,6 @@
|
||||
|
||||
|
||||
define([
|
||||
"code_128_reader",
|
||||
"ean_reader",
|
||||
"input_stream",
|
||||
"image_wrapper",
|
||||
"barcode_locator",
|
||||
@@ -16,9 +14,7 @@ define([
|
||||
"camera_access",
|
||||
"image_debug",
|
||||
"result_collector"],
|
||||
function(Code128Reader,
|
||||
EANReader,
|
||||
InputStream,
|
||||
function(InputStream,
|
||||
ImageWrapper,
|
||||
BarcodeLocator,
|
||||
BarcodeDecoder,
|
||||
@@ -489,10 +485,6 @@ function(Code128Reader,
|
||||
start();
|
||||
});
|
||||
},
|
||||
Reader: {
|
||||
EANReader : EANReader,
|
||||
Code128Reader : Code128Reader
|
||||
},
|
||||
ImageWrapper: ImageWrapper,
|
||||
ImageDebug: ImageDebug,
|
||||
ResultCollector: ResultCollector
|
||||
|
||||
+2
-1
@@ -47,7 +47,8 @@ require.config({
|
||||
'upc_e_reader': 'src/upc_e_reader',
|
||||
'upc_reader': 'src/upc_reader',
|
||||
'async': 'node_modules/async/lib/async',
|
||||
'result_collector': 'src/result_collector'
|
||||
'result_collector': 'src/result_collector',
|
||||
'i2of5_reader': 'src/i2of5_reader'
|
||||
},
|
||||
deps: allTestFiles,
|
||||
callback: window.__karma__.start
|
||||
|
||||
Reference in New Issue
Block a user