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Removed old YUV-based implementation

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git-svn-id: https://zxing.googlecode.com/svn/trunk@314 59b500cc-1b3d-0410-9834-0bbf25fbcc57
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srowen 2008-03-26 14:43:42 +00:00
parent 7de539a67c
commit e97b55f884
1 changed files with 0 additions and 126 deletions
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126
android/src/com/google/zxing/client/android/YUVMonochromeBitmapSource.java
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@ -1,126 +0,0 @@
/*
* Copyright (C) 2008 Google Inc.
*
* 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.client.android;
import android.graphics.Bitmap;
import com.google.zxing.BlackPointEstimationMethod;
import com.google.zxing.MonochromeBitmapSource;
import com.google.zxing.ReaderException;
import com.google.zxing.common.BitArray;
import com.google.zxing.common.BlackPointEstimator;
/**
* This object implements MonochromeBitmapSource around an Android Bitmap. Rather than capturing an
* RGB image and calculating the grey value at each pixel, we ask the camera driver for YUV data and
* strip out the luminance channel directly. This should be faster but provides fewer bits, i.e.
* fewer grey levels.
*
* @author dswitkin@google.com (Daniel Switkin)
* @author srowen@google.com (Sean Owen)
* @deprecated
*/
@Deprecated
final class YUVMonochromeBitmapSource implements MonochromeBitmapSource {
private final Bitmap image;
private int blackPoint;
private BlackPointEstimationMethod lastMethod;
private int lastArgument;
private static final int LUMINANCE_BITS = 5;
private static final int LUMINANCE_SHIFT = 8 - LUMINANCE_BITS;
private static final int LUMINANCE_BUCKETS = 1 << LUMINANCE_BITS;
YUVMonochromeBitmapSource(Bitmap image) {
this.image = image;
blackPoint = 0x7F;
lastMethod = null;
lastArgument = 0;
}
public boolean isBlack(int x, int y) {
return ((image.getPixel(x, y) >> 16) & 0xFF) < blackPoint;
}
public BitArray getBlackRow(int y, BitArray row, int startX, int getWidth) {
if (row == null) {
row = new BitArray(getWidth);
} else {
row.clear();
}
int[] pixelRow = new int[getWidth];
image.getPixels(pixelRow, 0, getWidth, startX, y, getWidth, 1);
for (int i = 0; i < getWidth; i++) {
if (((pixelRow[i] >> 16) & 0xFF) < blackPoint) {
row.set(i);
}
}
return row;
}
public int getHeight() {
return image.height();
}
public int getWidth() {
return image.width();
}
public void estimateBlackPoint(BlackPointEstimationMethod method, int argument) throws ReaderException {
if (!method.equals(lastMethod) || argument != lastArgument) {
int width = image.width();
int height = image.height();
int[] histogram = new int[LUMINANCE_BUCKETS];
if (method.equals(BlackPointEstimationMethod.TWO_D_SAMPLING)) {
int minDimension = width < height ? width : height;
int startI = height == minDimension ? 0 : (height - width) >> 1;
int startJ = width == minDimension ? 0 : (width - height) >> 1;
for (int n = 0; n < minDimension; n++) {
int pixel = image.getPixel(startJ + n, startI + n);
histogram[((pixel >> 16) & 0xFF) >> LUMINANCE_SHIFT]++;
}
} else if (method.equals(BlackPointEstimationMethod.ROW_SAMPLING)) {
if (argument < 0 || argument >= height) {
throw new IllegalArgumentException("Row is not within the image: " + argument);
}
int[] pixelRow = new int[width];
image.getPixels(pixelRow, 0, width, 0, argument, width, 1);
for (int x = 0; x < width; x++) {
histogram[((pixelRow[x] >> 16) & 0xFF) >> LUMINANCE_SHIFT]++;
}
} else {
throw new IllegalArgumentException("Unknown method: " + method);
}
blackPoint = BlackPointEstimator.estimate(histogram) << LUMINANCE_SHIFT;
lastMethod = method;
lastArgument = argument;
}
}
public BlackPointEstimationMethod getLastEstimationMethod() {
return lastMethod;
}
public MonochromeBitmapSource rotateCounterClockwise() {
throw new IllegalStateException("Rotate not supported");
}
public boolean isRotateSupported() {
return false;
}
}