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moved java files for pre-convert
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Henry Schimke
299
src/pdf417/decoder/DetectionResult.java
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299
src/pdf417/decoder/DetectionResult.java
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/*
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* Copyright 2013 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.zxing.pdf417.decoder;
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import com.google.zxing.pdf417.PDF417Common;
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import java.util.Formatter;
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/**
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* @author Guenther Grau
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*/
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final class DetectionResult {
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private static final int ADJUST_ROW_NUMBER_SKIP = 2;
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private final BarcodeMetadata barcodeMetadata;
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private final DetectionResultColumn[] detectionResultColumns;
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private BoundingBox boundingBox;
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private final int barcodeColumnCount;
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DetectionResult(BarcodeMetadata barcodeMetadata, BoundingBox boundingBox) {
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this.barcodeMetadata = barcodeMetadata;
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this.barcodeColumnCount = barcodeMetadata.getColumnCount();
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this.boundingBox = boundingBox;
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detectionResultColumns = new DetectionResultColumn[barcodeColumnCount + 2];
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}
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DetectionResultColumn[] getDetectionResultColumns() {
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adjustIndicatorColumnRowNumbers(detectionResultColumns[0]);
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adjustIndicatorColumnRowNumbers(detectionResultColumns[barcodeColumnCount + 1]);
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int unadjustedCodewordCount = PDF417Common.MAX_CODEWORDS_IN_BARCODE;
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int previousUnadjustedCount;
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do {
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previousUnadjustedCount = unadjustedCodewordCount;
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unadjustedCodewordCount = adjustRowNumbers();
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} while (unadjustedCodewordCount > 0 && unadjustedCodewordCount < previousUnadjustedCount);
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return detectionResultColumns;
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}
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private void adjustIndicatorColumnRowNumbers(DetectionResultColumn detectionResultColumn) {
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if (detectionResultColumn != null) {
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((DetectionResultRowIndicatorColumn) detectionResultColumn)
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.adjustCompleteIndicatorColumnRowNumbers(barcodeMetadata);
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}
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}
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// TODO ensure that no detected codewords with unknown row number are left
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// we should be able to estimate the row height and use it as a hint for the row number
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// we should also fill the rows top to bottom and bottom to top
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/**
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* @return number of codewords which don't have a valid row number. Note that the count is not accurate as codewords
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* will be counted several times. It just serves as an indicator to see when we can stop adjusting row numbers
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*/
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private int adjustRowNumbers() {
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int unadjustedCount = adjustRowNumbersByRow();
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if (unadjustedCount == 0) {
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return 0;
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}
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for (int barcodeColumn = 1; barcodeColumn < barcodeColumnCount + 1; barcodeColumn++) {
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Codeword[] codewords = detectionResultColumns[barcodeColumn].getCodewords();
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for (int codewordsRow = 0; codewordsRow < codewords.length; codewordsRow++) {
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if (codewords[codewordsRow] == null) {
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continue;
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}
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if (!codewords[codewordsRow].hasValidRowNumber()) {
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adjustRowNumbers(barcodeColumn, codewordsRow, codewords);
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}
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}
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}
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return unadjustedCount;
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}
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private int adjustRowNumbersByRow() {
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adjustRowNumbersFromBothRI();
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// TODO we should only do full row adjustments if row numbers of left and right row indicator column match.
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// Maybe it's even better to calculated the height (in codeword rows) and divide it by the number of barcode
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// rows. This, together with the LRI and RRI row numbers should allow us to get a good estimate where a row
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// number starts and ends.
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int unadjustedCount = adjustRowNumbersFromLRI();
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return unadjustedCount + adjustRowNumbersFromRRI();
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}
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private void adjustRowNumbersFromBothRI() {
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if (detectionResultColumns[0] == null || detectionResultColumns[barcodeColumnCount + 1] == null) {
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return;
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}
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Codeword[] LRIcodewords = detectionResultColumns[0].getCodewords();
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Codeword[] RRIcodewords = detectionResultColumns[barcodeColumnCount + 1].getCodewords();
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for (int codewordsRow = 0; codewordsRow < LRIcodewords.length; codewordsRow++) {
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if (LRIcodewords[codewordsRow] != null &&
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RRIcodewords[codewordsRow] != null &&
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LRIcodewords[codewordsRow].getRowNumber() == RRIcodewords[codewordsRow].getRowNumber()) {
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for (int barcodeColumn = 1; barcodeColumn <= barcodeColumnCount; barcodeColumn++) {
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Codeword codeword = detectionResultColumns[barcodeColumn].getCodewords()[codewordsRow];
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if (codeword == null) {
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continue;
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}
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codeword.setRowNumber(LRIcodewords[codewordsRow].getRowNumber());
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if (!codeword.hasValidRowNumber()) {
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detectionResultColumns[barcodeColumn].getCodewords()[codewordsRow] = null;
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}
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}
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}
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}
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}
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private int adjustRowNumbersFromRRI() {
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if (detectionResultColumns[barcodeColumnCount + 1] == null) {
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return 0;
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}
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int unadjustedCount = 0;
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Codeword[] codewords = detectionResultColumns[barcodeColumnCount + 1].getCodewords();
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for (int codewordsRow = 0; codewordsRow < codewords.length; codewordsRow++) {
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if (codewords[codewordsRow] == null) {
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continue;
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}
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int rowIndicatorRowNumber = codewords[codewordsRow].getRowNumber();
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int invalidRowCounts = 0;
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for (int barcodeColumn = barcodeColumnCount + 1;
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barcodeColumn > 0 && invalidRowCounts < ADJUST_ROW_NUMBER_SKIP;
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barcodeColumn--) {
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Codeword codeword = detectionResultColumns[barcodeColumn].getCodewords()[codewordsRow];
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if (codeword != null) {
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invalidRowCounts = adjustRowNumberIfValid(rowIndicatorRowNumber, invalidRowCounts, codeword);
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if (!codeword.hasValidRowNumber()) {
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unadjustedCount++;
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}
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}
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}
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}
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return unadjustedCount;
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}
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private int adjustRowNumbersFromLRI() {
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if (detectionResultColumns[0] == null) {
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return 0;
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}
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int unadjustedCount = 0;
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Codeword[] codewords = detectionResultColumns[0].getCodewords();
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for (int codewordsRow = 0; codewordsRow < codewords.length; codewordsRow++) {
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if (codewords[codewordsRow] == null) {
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continue;
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}
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int rowIndicatorRowNumber = codewords[codewordsRow].getRowNumber();
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int invalidRowCounts = 0;
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for (int barcodeColumn = 1;
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barcodeColumn < barcodeColumnCount + 1 && invalidRowCounts < ADJUST_ROW_NUMBER_SKIP;
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barcodeColumn++) {
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Codeword codeword = detectionResultColumns[barcodeColumn].getCodewords()[codewordsRow];
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if (codeword != null) {
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invalidRowCounts = adjustRowNumberIfValid(rowIndicatorRowNumber, invalidRowCounts, codeword);
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if (!codeword.hasValidRowNumber()) {
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unadjustedCount++;
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}
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}
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}
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}
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return unadjustedCount;
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}
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private static int adjustRowNumberIfValid(int rowIndicatorRowNumber, int invalidRowCounts, Codeword codeword) {
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if (codeword == null) {
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return invalidRowCounts;
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}
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if (!codeword.hasValidRowNumber()) {
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if (codeword.isValidRowNumber(rowIndicatorRowNumber)) {
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codeword.setRowNumber(rowIndicatorRowNumber);
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invalidRowCounts = 0;
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} else {
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++invalidRowCounts;
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}
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}
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return invalidRowCounts;
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}
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private void adjustRowNumbers(int barcodeColumn, int codewordsRow, Codeword[] codewords) {
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Codeword codeword = codewords[codewordsRow];
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Codeword[] previousColumnCodewords = detectionResultColumns[barcodeColumn - 1].getCodewords();
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Codeword[] nextColumnCodewords = previousColumnCodewords;
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if (detectionResultColumns[barcodeColumn + 1] != null) {
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nextColumnCodewords = detectionResultColumns[barcodeColumn + 1].getCodewords();
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}
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Codeword[] otherCodewords = new Codeword[14];
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otherCodewords[2] = previousColumnCodewords[codewordsRow];
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otherCodewords[3] = nextColumnCodewords[codewordsRow];
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if (codewordsRow > 0) {
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otherCodewords[0] = codewords[codewordsRow - 1];
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otherCodewords[4] = previousColumnCodewords[codewordsRow - 1];
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otherCodewords[5] = nextColumnCodewords[codewordsRow - 1];
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}
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if (codewordsRow > 1) {
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otherCodewords[8] = codewords[codewordsRow - 2];
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otherCodewords[10] = previousColumnCodewords[codewordsRow - 2];
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otherCodewords[11] = nextColumnCodewords[codewordsRow - 2];
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}
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if (codewordsRow < codewords.length - 1) {
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otherCodewords[1] = codewords[codewordsRow + 1];
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otherCodewords[6] = previousColumnCodewords[codewordsRow + 1];
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otherCodewords[7] = nextColumnCodewords[codewordsRow + 1];
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}
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if (codewordsRow < codewords.length - 2) {
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otherCodewords[9] = codewords[codewordsRow + 2];
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otherCodewords[12] = previousColumnCodewords[codewordsRow + 2];
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otherCodewords[13] = nextColumnCodewords[codewordsRow + 2];
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}
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for (Codeword otherCodeword : otherCodewords) {
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if (adjustRowNumber(codeword, otherCodeword)) {
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return;
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}
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}
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}
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/**
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* @return true, if row number was adjusted, false otherwise
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*/
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private static boolean adjustRowNumber(Codeword codeword, Codeword otherCodeword) {
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if (otherCodeword == null) {
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return false;
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}
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if (otherCodeword.hasValidRowNumber() && otherCodeword.getBucket() == codeword.getBucket()) {
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codeword.setRowNumber(otherCodeword.getRowNumber());
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return true;
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}
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return false;
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}
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int getBarcodeColumnCount() {
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return barcodeColumnCount;
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}
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int getBarcodeRowCount() {
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return barcodeMetadata.getRowCount();
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}
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int getBarcodeECLevel() {
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return barcodeMetadata.getErrorCorrectionLevel();
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}
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void setBoundingBox(BoundingBox boundingBox) {
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this.boundingBox = boundingBox;
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}
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BoundingBox getBoundingBox() {
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return boundingBox;
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}
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void setDetectionResultColumn(int barcodeColumn, DetectionResultColumn detectionResultColumn) {
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detectionResultColumns[barcodeColumn] = detectionResultColumn;
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}
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DetectionResultColumn getDetectionResultColumn(int barcodeColumn) {
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return detectionResultColumns[barcodeColumn];
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}
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@Override
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public String toString() {
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DetectionResultColumn rowIndicatorColumn = detectionResultColumns[0];
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if (rowIndicatorColumn == null) {
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rowIndicatorColumn = detectionResultColumns[barcodeColumnCount + 1];
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}
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try (Formatter formatter = new Formatter()) {
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for (int codewordsRow = 0; codewordsRow < rowIndicatorColumn.getCodewords().length; codewordsRow++) {
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formatter.format("CW %3d:", codewordsRow);
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for (int barcodeColumn = 0; barcodeColumn < barcodeColumnCount + 2; barcodeColumn++) {
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if (detectionResultColumns[barcodeColumn] == null) {
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formatter.format(" | ");
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continue;
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}
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Codeword codeword = detectionResultColumns[barcodeColumn].getCodewords()[codewordsRow];
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if (codeword == null) {
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formatter.format(" | ");
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continue;
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}
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formatter.format(" %3d|%3d", codeword.getRowNumber(), codeword.getValue());
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}
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formatter.format("%n");
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}
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return formatter.toString();
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}
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}
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}
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