use of com.google.zxing.oned.rss.DataCharacter in project weex-example by KalicyZhou.
the class RSSExpandedReader method retrieveNextPair.
// not private for testing
ExpandedPair retrieveNextPair(BitArray row, List<ExpandedPair> previousPairs, int rowNumber) throws NotFoundException {
boolean isOddPattern = previousPairs.size() % 2 == 0;
if (startFromEven) {
isOddPattern = !isOddPattern;
}
FinderPattern pattern;
boolean keepFinding = true;
int forcedOffset = -1;
do {
this.findNextPair(row, previousPairs, forcedOffset);
pattern = parseFoundFinderPattern(row, rowNumber, isOddPattern);
if (pattern == null) {
forcedOffset = getNextSecondBar(row, this.startEnd[0]);
} else {
keepFinding = false;
}
} while (keepFinding);
// When stacked symbol is split over multiple rows, there's no way to guess if this pair can be last or not.
// boolean mayBeLast = checkPairSequence(previousPairs, pattern);
DataCharacter leftChar = this.decodeDataCharacter(row, pattern, isOddPattern, true);
if (!previousPairs.isEmpty() && previousPairs.get(previousPairs.size() - 1).mustBeLast()) {
throw NotFoundException.getNotFoundInstance();
}
DataCharacter rightChar;
try {
rightChar = this.decodeDataCharacter(row, pattern, isOddPattern, false);
} catch (NotFoundException ignored) {
rightChar = null;
}
boolean mayBeLast = true;
return new ExpandedPair(leftChar, rightChar, pattern, mayBeLast);
}
use of com.google.zxing.oned.rss.DataCharacter in project zxing by zxing.
the class BitArrayBuilderTest method buildBitArray.
private static BitArray buildBitArray(int[][] pairValues) {
List<ExpandedPair> pairs = new ArrayList<>();
for (int i = 0; i < pairValues.length; ++i) {
int[] pair = pairValues[i];
DataCharacter leftChar;
if (i == 0) {
leftChar = null;
} else {
leftChar = new DataCharacter(pair[0], 0);
}
DataCharacter rightChar;
if (i == 0) {
rightChar = new DataCharacter(pair[0], 0);
} else if (pair.length == 2) {
rightChar = new DataCharacter(pair[1], 0);
} else {
rightChar = null;
}
ExpandedPair expandedPair = new ExpandedPair(leftChar, rightChar, null, true);
pairs.add(expandedPair);
}
return BitArrayBuilder.buildBitArray(pairs);
}
use of com.google.zxing.oned.rss.DataCharacter in project weex-example by KalicyZhou.
the class RSSExpandedReader method decodeDataCharacter.
DataCharacter decodeDataCharacter(BitArray row, FinderPattern pattern, boolean isOddPattern, boolean leftChar) throws NotFoundException {
int[] counters = this.getDataCharacterCounters();
counters[0] = 0;
counters[1] = 0;
counters[2] = 0;
counters[3] = 0;
counters[4] = 0;
counters[5] = 0;
counters[6] = 0;
counters[7] = 0;
if (leftChar) {
recordPatternInReverse(row, pattern.getStartEnd()[0], counters);
} else {
recordPattern(row, pattern.getStartEnd()[1], counters);
// reverse it
for (int i = 0, j = counters.length - 1; i < j; i++, j--) {
int temp = counters[i];
counters[i] = counters[j];
counters[j] = temp;
}
}
//counters[] has the pixels of the module
//left and right data characters have all the same length
int numModules = 17;
float elementWidth = (float) count(counters) / (float) numModules;
// Sanity check: element width for pattern and the character should match
float expectedElementWidth = (pattern.getStartEnd()[1] - pattern.getStartEnd()[0]) / 15.0f;
if (Math.abs(elementWidth - expectedElementWidth) / expectedElementWidth > 0.3f) {
throw NotFoundException.getNotFoundInstance();
}
int[] oddCounts = this.getOddCounts();
int[] evenCounts = this.getEvenCounts();
float[] oddRoundingErrors = this.getOddRoundingErrors();
float[] evenRoundingErrors = this.getEvenRoundingErrors();
for (int i = 0; i < counters.length; i++) {
float value = 1.0f * counters[i] / elementWidth;
// Round
int count = (int) (value + 0.5f);
if (count < 1) {
if (value < 0.3f) {
throw NotFoundException.getNotFoundInstance();
}
count = 1;
} else if (count > 8) {
if (value > 8.7f) {
throw NotFoundException.getNotFoundInstance();
}
count = 8;
}
int offset = i / 2;
if ((i & 0x01) == 0) {
oddCounts[offset] = count;
oddRoundingErrors[offset] = value - count;
} else {
evenCounts[offset] = count;
evenRoundingErrors[offset] = value - count;
}
}
adjustOddEvenCounts(numModules);
int weightRowNumber = 4 * pattern.getValue() + (isOddPattern ? 0 : 2) + (leftChar ? 0 : 1) - 1;
int oddSum = 0;
int oddChecksumPortion = 0;
for (int i = oddCounts.length - 1; i >= 0; i--) {
if (isNotA1left(pattern, isOddPattern, leftChar)) {
int weight = WEIGHTS[weightRowNumber][2 * i];
oddChecksumPortion += oddCounts[i] * weight;
}
oddSum += oddCounts[i];
}
int evenChecksumPortion = 0;
//int evenSum = 0;
for (int i = evenCounts.length - 1; i >= 0; i--) {
if (isNotA1left(pattern, isOddPattern, leftChar)) {
int weight = WEIGHTS[weightRowNumber][2 * i + 1];
evenChecksumPortion += evenCounts[i] * weight;
}
//evenSum += evenCounts[i];
}
int checksumPortion = oddChecksumPortion + evenChecksumPortion;
if ((oddSum & 0x01) != 0 || oddSum > 13 || oddSum < 4) {
throw NotFoundException.getNotFoundInstance();
}
int group = (13 - oddSum) / 2;
int oddWidest = SYMBOL_WIDEST[group];
int evenWidest = 9 - oddWidest;
int vOdd = RSSUtils.getRSSvalue(oddCounts, oddWidest, true);
int vEven = RSSUtils.getRSSvalue(evenCounts, evenWidest, false);
int tEven = EVEN_TOTAL_SUBSET[group];
int gSum = GSUM[group];
int value = vOdd * tEven + vEven + gSum;
return new DataCharacter(value, checksumPortion);
}
use of com.google.zxing.oned.rss.DataCharacter in project weex-example by KalicyZhou.
the class RSSExpandedReader method checkChecksum.
private boolean checkChecksum() {
ExpandedPair firstPair = this.pairs.get(0);
DataCharacter checkCharacter = firstPair.getLeftChar();
DataCharacter firstCharacter = firstPair.getRightChar();
if (firstCharacter == null) {
return false;
}
int checksum = firstCharacter.getChecksumPortion();
int s = 2;
for (int i = 1; i < this.pairs.size(); ++i) {
ExpandedPair currentPair = this.pairs.get(i);
checksum += currentPair.getLeftChar().getChecksumPortion();
s++;
DataCharacter currentRightChar = currentPair.getRightChar();
if (currentRightChar != null) {
checksum += currentRightChar.getChecksumPortion();
s++;
}
}
checksum %= 211;
int checkCharacterValue = 211 * (s - 4) + checksum;
return checkCharacterValue == checkCharacter.getValue();
}
use of com.google.zxing.oned.rss.DataCharacter in project zxing by zxing.
the class RSSExpandedInternalTestCase method testDecodeDataCharacter.
@Test
public void testDecodeDataCharacter() throws Exception {
BufferedImage image = readImage("3.png");
BinaryBitmap binaryMap = new BinaryBitmap(new GlobalHistogramBinarizer(new BufferedImageLuminanceSource(image)));
BitArray row = binaryMap.getBlackRow(binaryMap.getHeight() / 2, null);
//image pixels where the A1 pattern starts (at 124) and ends (at 214)
int[] startEnd = { 145, 243 };
// A
int value = 0;
FinderPattern finderPatternA1 = new FinderPattern(value, startEnd, startEnd[0], startEnd[1], image.getHeight() / 2);
//{1, 8, 4, 1, 1};
RSSExpandedReader rssExpandedReader = new RSSExpandedReader();
DataCharacter dataCharacter = rssExpandedReader.decodeDataCharacter(row, finderPatternA1, true, false);
assertEquals(19, dataCharacter.getValue());
assertEquals(1007, dataCharacter.getChecksumPortion());
}
Aggregations