aboutsummaryrefslogtreecommitdiffstats
path: root/libraries/zxing/src/com/google/zxing/multi/GenericMultipleBarcodeReader.java
diff options
context:
space:
mode:
Diffstat (limited to 'libraries/zxing/src/com/google/zxing/multi/GenericMultipleBarcodeReader.java')
-rw-r--r--libraries/zxing/src/com/google/zxing/multi/GenericMultipleBarcodeReader.java156
1 files changed, 0 insertions, 156 deletions
diff --git a/libraries/zxing/src/com/google/zxing/multi/GenericMultipleBarcodeReader.java b/libraries/zxing/src/com/google/zxing/multi/GenericMultipleBarcodeReader.java
deleted file mode 100644
index 70d454251..000000000
--- a/libraries/zxing/src/com/google/zxing/multi/GenericMultipleBarcodeReader.java
+++ /dev/null
@@ -1,156 +0,0 @@
-/*
- * Copyright 2009 ZXing authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.zxing.multi;
-
-import com.google.zxing.BinaryBitmap;
-import com.google.zxing.NotFoundException;
-import com.google.zxing.Reader;
-import com.google.zxing.ReaderException;
-import com.google.zxing.Result;
-import com.google.zxing.ResultPoint;
-
-import java.util.Hashtable;
-import java.util.Vector;
-
-/**
- * <p>Attempts to locate multiple barcodes in an image by repeatedly decoding portion of the image.
- * After one barcode is found, the areas left, above, right and below the barcode's
- * {@link com.google.zxing.ResultPoint}s are scanned, recursively.</p>
- *
- * <p>A caller may want to also employ {@link ByQuadrantReader} when attempting to find multiple
- * 2D barcodes, like QR Codes, in an image, where the presence of multiple barcodes might prevent
- * detecting any one of them.</p>
- *
- * <p>That is, instead of passing a {@link Reader} a caller might pass
- * <code>new ByQuadrantReader(reader)</code>.</p>
- *
- * @author Sean Owen
- */
-public final class GenericMultipleBarcodeReader implements MultipleBarcodeReader {
-
- private static final int MIN_DIMENSION_TO_RECUR = 100;
-
- private final Reader delegate;
-
- public GenericMultipleBarcodeReader(Reader delegate) {
- this.delegate = delegate;
- }
-
- public Result[] decodeMultiple(BinaryBitmap image) throws NotFoundException {
- return decodeMultiple(image, null);
- }
-
- public Result[] decodeMultiple(BinaryBitmap image, Hashtable hints)
- throws NotFoundException {
- Vector results = new Vector();
- doDecodeMultiple(image, hints, results, 0, 0);
- if (results.isEmpty()) {
- throw NotFoundException.getNotFoundInstance();
- }
- int numResults = results.size();
- Result[] resultArray = new Result[numResults];
- for (int i = 0; i < numResults; i++) {
- resultArray[i] = (Result) results.elementAt(i);
- }
- return resultArray;
- }
-
- private void doDecodeMultiple(BinaryBitmap image,
- Hashtable hints,
- Vector results,
- int xOffset,
- int yOffset) {
- Result result;
- try {
- result = delegate.decode(image, hints);
- } catch (ReaderException re) {
- return;
- }
- boolean alreadyFound = false;
- for (int i = 0; i < results.size(); i++) {
- Result existingResult = (Result) results.elementAt(i);
- if (existingResult.getText().equals(result.getText())) {
- alreadyFound = true;
- break;
- }
- }
- if (alreadyFound) {
- return;
- }
- results.addElement(translateResultPoints(result, xOffset, yOffset));
- ResultPoint[] resultPoints = result.getResultPoints();
- if (resultPoints == null || resultPoints.length == 0) {
- return;
- }
- int width = image.getWidth();
- int height = image.getHeight();
- float minX = width;
- float minY = height;
- float maxX = 0.0f;
- float maxY = 0.0f;
- for (int i = 0; i < resultPoints.length; i++) {
- ResultPoint point = resultPoints[i];
- float x = point.getX();
- float y = point.getY();
- if (x < minX) {
- minX = x;
- }
- if (y < minY) {
- minY = y;
- }
- if (x > maxX) {
- maxX = x;
- }
- if (y > maxY) {
- maxY = y;
- }
- }
-
- // Decode left of barcode
- if (minX > MIN_DIMENSION_TO_RECUR) {
- doDecodeMultiple(image.crop(0, 0, (int) minX, height),
- hints, results, xOffset, yOffset);
- }
- // Decode above barcode
- if (minY > MIN_DIMENSION_TO_RECUR) {
- doDecodeMultiple(image.crop(0, 0, width, (int) minY),
- hints, results, xOffset, yOffset);
- }
- // Decode right of barcode
- if (maxX < width - MIN_DIMENSION_TO_RECUR) {
- doDecodeMultiple(image.crop((int) maxX, 0, width - (int) maxX, height),
- hints, results, xOffset + (int) maxX, yOffset);
- }
- // Decode below barcode
- if (maxY < height - MIN_DIMENSION_TO_RECUR) {
- doDecodeMultiple(image.crop(0, (int) maxY, width, height - (int) maxY),
- hints, results, xOffset, yOffset + (int) maxY);
- }
- }
-
- private static Result translateResultPoints(Result result, int xOffset, int yOffset) {
- ResultPoint[] oldResultPoints = result.getResultPoints();
- ResultPoint[] newResultPoints = new ResultPoint[oldResultPoints.length];
- for (int i = 0; i < oldResultPoints.length; i++) {
- ResultPoint oldPoint = oldResultPoints[i];
- newResultPoints[i] = new ResultPoint(oldPoint.getX() + xOffset, oldPoint.getY() + yOffset);
- }
- return new Result(result.getText(), result.getRawBytes(), newResultPoints,
- result.getBarcodeFormat());
- }
-
-}