void setRowNumbers() { for (Codeword codeword : getCodewords()) { if (codeword != null) { codeword.setRowNumberAsRowIndicatorColumn(); } } }
BarcodeMetadata getBarcodeMetadata() { Codeword[] codewords = getCodewords(); BarcodeValue barcodeColumnCount = new BarcodeValue(); BarcodeValue barcodeRowCountUpperPart = new BarcodeValue(); BarcodeValue barcodeRowCountLowerPart = new BarcodeValue(); BarcodeValue barcodeECLevel = new BarcodeValue(); for (Codeword codeword : codewords) { if (codeword == null) { continue; } codeword.setRowNumberAsRowIndicatorColumn(); int rowIndicatorValue = codeword.getValue() % 30; int codewordRowNumber = codeword.getRowNumber(); if (!isLeft) { codewordRowNumber += 2; } switch (codewordRowNumber % 3) { case 0: barcodeRowCountUpperPart.setValue(rowIndicatorValue * 3 + 1); break; case 1: barcodeECLevel.setValue(rowIndicatorValue / 3); barcodeRowCountLowerPart.setValue(rowIndicatorValue % 3); break; case 2: barcodeColumnCount.setValue(rowIndicatorValue + 1); break; } } // Maybe we should check if we have ambiguous values? if ((barcodeColumnCount.getValue().length == 0) || (barcodeRowCountUpperPart.getValue().length == 0) || (barcodeRowCountLowerPart.getValue().length == 0) || (barcodeECLevel.getValue().length == 0) || barcodeColumnCount.getValue()[0] < 1 || barcodeRowCountUpperPart.getValue()[0] + barcodeRowCountLowerPart.getValue()[0] < PDF417Common.MIN_ROWS_IN_BARCODE || barcodeRowCountUpperPart.getValue()[0] + barcodeRowCountLowerPart.getValue()[0] > PDF417Common.MAX_ROWS_IN_BARCODE) { return null; } BarcodeMetadata barcodeMetadata = new BarcodeMetadata( barcodeColumnCount.getValue()[0], barcodeRowCountUpperPart.getValue()[0], barcodeRowCountLowerPart.getValue()[0], barcodeECLevel.getValue()[0]); removeIncorrectCodewords(codewords, barcodeMetadata); return barcodeMetadata; }
// TODO maybe we should add missing codewords to store the correct row number to make // finding row numbers for other columns easier // use row height count to make detection of invalid row numbers more reliable int adjustIncompleteIndicatorColumnRowNumbers(BarcodeMetadata barcodeMetadata) { BoundingBox boundingBox = getBoundingBox(); ResultPoint top = isLeft ? boundingBox.getTopLeft() : boundingBox.getTopRight(); ResultPoint bottom = isLeft ? boundingBox.getBottomLeft() : boundingBox.getBottomRight(); int firstRow = imageRowToCodewordIndex((int) top.getY()); int lastRow = imageRowToCodewordIndex((int) bottom.getY()); float averageRowHeight = (lastRow - firstRow) / (float) barcodeMetadata.getRowCount(); Codeword[] codewords = getCodewords(); int barcodeRow = -1; int maxRowHeight = 1; int currentRowHeight = 0; for (int codewordsRow = firstRow; codewordsRow < lastRow; codewordsRow++) { if (codewords[codewordsRow] == null) { continue; } Codeword codeword = codewords[codewordsRow]; codeword.setRowNumberAsRowIndicatorColumn(); int rowDifference = codeword.getRowNumber() - barcodeRow; // TODO improve handling with case where first row indicator doesn't start with 0 if (rowDifference == 0) { currentRowHeight++; } else if (rowDifference == 1) { maxRowHeight = Math.max(maxRowHeight, currentRowHeight); currentRowHeight = 1; barcodeRow = codeword.getRowNumber(); } else if (codeword.getRowNumber() >= barcodeMetadata.getRowCount()) { codewords[codewordsRow] = null; } else { barcodeRow = codeword.getRowNumber(); currentRowHeight = 1; } } return (int) (averageRowHeight + 0.5); }