diff options
Diffstat (limited to 'libraries/zxing/src/com/google/zxing/multi/ByQuadrantReader.java')
-rw-r--r-- | libraries/zxing/src/com/google/zxing/multi/ByQuadrantReader.java | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/libraries/zxing/src/com/google/zxing/multi/ByQuadrantReader.java b/libraries/zxing/src/com/google/zxing/multi/ByQuadrantReader.java deleted file mode 100644 index 35904d364..000000000 --- a/libraries/zxing/src/com/google/zxing/multi/ByQuadrantReader.java +++ /dev/null @@ -1,96 +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.ChecksumException; -import com.google.zxing.FormatException; -import com.google.zxing.NotFoundException; -import com.google.zxing.Reader; -import com.google.zxing.Result; - -import java.util.Hashtable; - -/** - * This class attempts to decode a barcode from an image, not by scanning the whole image, - * but by scanning subsets of the image. This is important when there may be multiple barcodes in - * an image, and detecting a barcode may find parts of multiple barcode and fail to decode - * (e.g. QR Codes). Instead this scans the four quadrants of the image -- and also the center - * 'quadrant' to cover the case where a barcode is found in the center. - * - * @see GenericMultipleBarcodeReader - */ -public final class ByQuadrantReader implements Reader { - - private final Reader delegate; - - public ByQuadrantReader(Reader delegate) { - this.delegate = delegate; - } - - public Result decode(BinaryBitmap image) - throws NotFoundException, ChecksumException, FormatException { - return decode(image, null); - } - - public Result decode(BinaryBitmap image, Hashtable hints) - throws NotFoundException, ChecksumException, FormatException { - - int width = image.getWidth(); - int height = image.getHeight(); - int halfWidth = width / 2; - int halfHeight = height / 2; - - BinaryBitmap topLeft = image.crop(0, 0, halfWidth, halfHeight); - try { - return delegate.decode(topLeft, hints); - } catch (NotFoundException re) { - // continue - } - - BinaryBitmap topRight = image.crop(halfWidth, 0, halfWidth, halfHeight); - try { - return delegate.decode(topRight, hints); - } catch (NotFoundException re) { - // continue - } - - BinaryBitmap bottomLeft = image.crop(0, halfHeight, halfWidth, halfHeight); - try { - return delegate.decode(bottomLeft, hints); - } catch (NotFoundException re) { - // continue - } - - BinaryBitmap bottomRight = image.crop(halfWidth, halfHeight, halfWidth, halfHeight); - try { - return delegate.decode(bottomRight, hints); - } catch (NotFoundException re) { - // continue - } - - int quarterWidth = halfWidth / 2; - int quarterHeight = halfHeight / 2; - BinaryBitmap center = image.crop(quarterWidth, quarterHeight, halfWidth, halfHeight); - return delegate.decode(center, hints); - } - - public void reset() { - delegate.reset(); - } - -} |