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Optionally use explict luminance conversion instead of AWT builtin conversion
git-svn-id: https://zxing.googlecode.com/svn/trunk@2494 59b500cc-1b3d-0410-9834-0bbf25fbcc57
This commit is contained in:
smparkes@smparkes.net
parent
885856bbc4
commit
33cb6a0745
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@ -94,6 +94,7 @@
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<enable/>
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<enable/>
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</assertions>
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</assertions>
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<jvmarg value="-Djava.awt.headless=true"/>
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<jvmarg value="-Djava.awt.headless=true"/>
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<jvmarg value="-DexplicitLuminanceConversion=true"/>
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<batchtest>
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<batchtest>
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<fileset dir="test/src">
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<fileset dir="test/src">
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<include name="**/${subdir}/*BlackBox*TestCase.java"/>
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<include name="**/${subdir}/*BlackBox*TestCase.java"/>
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@ -19,6 +19,7 @@ package com.google.zxing;
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import java.awt.Graphics2D;
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import java.awt.Graphics2D;
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import java.awt.geom.AffineTransform;
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import java.awt.geom.AffineTransform;
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import java.awt.image.BufferedImage;
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import java.awt.image.BufferedImage;
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import java.awt.image.WritableRaster;
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/**
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/**
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* This LuminanceSource implementation is meant for J2SE clients and our blackbox unit tests.
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* This LuminanceSource implementation is meant for J2SE clients and our blackbox unit tests.
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@ -29,144 +30,187 @@ import java.awt.image.BufferedImage;
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*/
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*/
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public final class BufferedImageLuminanceSource extends LuminanceSource {
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public final class BufferedImageLuminanceSource extends LuminanceSource {
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private static final double MINUS_45_IN_RADIANS = -0.7853981633974483; // Math.toRadians(-45.0)
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private static final double MINUS_45_IN_RADIANS = -0.7853981633974483; // Math.toRadians(-45.0)
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private final BufferedImage image;
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private final BufferedImage image;
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private final int left;
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private final int left;
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private final int top;
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private final int top;
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public BufferedImageLuminanceSource(BufferedImage image) {
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private static final boolean EXPLICIT_LUMINANCE_CONVERSION;
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this(image, 0, 0, image.getWidth(), image.getHeight());
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static {
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}
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String property = System.getProperty("explicitLuminanceConversion");
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if (property == null) {
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public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {
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property = System.getenv("EXPLICIT_LUMINANCE_CONVERSION");
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super(width, height);
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int sourceWidth = image.getWidth();
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int sourceHeight = image.getHeight();
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if (left + width > sourceWidth || top + height > sourceHeight) {
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throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
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}
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// The color of fully-transparent pixels is irrelevant. They are often, technically, fully-transparent
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// black (0 alpha, and then 0 RGB). They are often used, of course as the "white" area in a
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// barcode image. Force any such pixel to be white:
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if (image.getAlphaRaster() != null) {
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int[] buffer = new int[width];
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for (int y = top; y < top + height; y++) {
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image.getRGB(left, y, width, 1, buffer, 0, sourceWidth);
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boolean rowChanged = false;
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for (int x = 0; x < width; x++) {
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if ((buffer[x] & 0xFF000000) == 0) {
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buffer[x] = 0xFFFFFFFF; // = white
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rowChanged = true;
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}
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}
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}
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if (rowChanged) {
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EXPLICIT_LUMINANCE_CONVERSION = Boolean.parseBoolean(property);
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image.setRGB(left, y, width, 1, buffer, 0, sourceWidth);
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}
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public BufferedImageLuminanceSource(BufferedImage image) {
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this(image, 0, 0, image.getWidth(), image.getHeight());
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}
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public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {
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super(width, height);
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if (image.getType() == BufferedImage.TYPE_BYTE_GRAY) {
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this.image = image;
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} else {
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int sourceWidth = image.getWidth();
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int sourceHeight = image.getHeight();
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if (left + width > sourceWidth || top + height > sourceHeight) {
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throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
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}
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this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);
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if (EXPLICIT_LUMINANCE_CONVERSION) {
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WritableRaster raster = this.image.getRaster();
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int[] buffer = new int[width];
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for (int y = top; y < top + height; y++) {
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image.getRGB(left, y, width, 1, buffer, 0, sourceWidth);
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for (int x = 0; x < width; x++) {
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int pixel = buffer[x];
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// see comments in implicit branch
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if ((pixel & 0xFF000000) == 0) {
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pixel = 0xFFFFFFFF; // = white
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}
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int luminance = 0;
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// .229R + 0.587G + 0.114B (YUV/YIQ for PAL and NTSC)
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luminance = (306 * ((pixel >> 16) & 0xFF) +
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601 * ((pixel >> 8) & 0xFF) +
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117 * (pixel & 0xFF) +
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(0x200)) >> 10; // 0x200 = 1<<9, half an lsb of the result to force rounding
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buffer[x] = luminance;
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}
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raster.setPixels(left, y, width, 1, buffer);
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}
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} else {
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// The color of fully-transparent pixels is irrelevant. They are often, technically, fully-transparent
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// black (0 alpha, and then 0 RGB). They are often used, of course as the "white" area in a
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// barcode image. Force any such pixel to be white:
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if (image.getAlphaRaster() != null) {
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int[] buffer = new int[width];
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for (int y = top; y < top + height; y++) {
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image.getRGB(left, y, width, 1, buffer, 0, sourceWidth);
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boolean rowChanged = false;
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for (int x = 0; x < width; x++) {
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if ((buffer[x] & 0xFF000000) == 0) {
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buffer[x] = 0xFFFFFFFF; // = white
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rowChanged = true;
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}
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}
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if (rowChanged) {
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image.setRGB(left, y, width, 1, buffer, 0, sourceWidth);
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}
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}
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}
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// Create a grayscale copy, no need to calculate the luminance manually
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this.image.getGraphics().drawImage(image, 0, 0, null);
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}
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}
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}
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}
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this.left = left;
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this.top = top;
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}
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}
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// Create a grayscale copy, no need to calculate the luminance manually
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@Override
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this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);
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public byte[] getRow(int y, byte[] row) {
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this.image.getGraphics().drawImage(image, 0, 0, null);
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if (y < 0 || y >= getHeight()) {
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this.left = left;
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throw new IllegalArgumentException("Requested row is outside the image: " + y);
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this.top = top;
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}
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}
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int width = getWidth();
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if (row == null || row.length < width) {
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@Override
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row = new byte[width];
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public byte[] getRow(int y, byte[] row) {
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}
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if (y < 0 || y >= getHeight()) {
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// The underlying raster of image consists of bytes with the luminance values
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throw new IllegalArgumentException("Requested row is outside the image: " + y);
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image.getRaster().getDataElements(left, top + y, width, 1, row);
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return row;
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}
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}
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int width = getWidth();
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if (row == null || row.length < width) {
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@Override
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row = new byte[width];
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public byte[] getMatrix() {
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int width = getWidth();
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int height = getHeight();
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int area = width * height;
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byte[] matrix = new byte[area];
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// The underlying raster of image consists of area bytes with the luminance values
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image.getRaster().getDataElements(left, top, width, height, matrix);
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return matrix;
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}
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}
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// The underlying raster of image consists of bytes with the luminance values
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image.getRaster().getDataElements(left, top + y, width, 1, row);
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return row;
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}
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@Override
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@Override
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public byte[] getMatrix() {
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public boolean isCropSupported() {
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int width = getWidth();
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return true;
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int height = getHeight();
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}
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int area = width * height;
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byte[] matrix = new byte[area];
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// The underlying raster of image consists of area bytes with the luminance values
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image.getRaster().getDataElements(left, top, width, height, matrix);
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return matrix;
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}
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@Override
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@Override
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public boolean isCropSupported() {
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public LuminanceSource crop(int left, int top, int width, int height) {
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return true;
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return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
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}
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}
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@Override
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/**
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public LuminanceSource crop(int left, int top, int width, int height) {
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* This is always true, since the image is a gray-scale image.
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return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
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*
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}
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* @return true
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*/
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@Override
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public boolean isRotateSupported() {
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return true;
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}
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/**
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@Override
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* This is always true, since the image is a gray-scale image.
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public LuminanceSource rotateCounterClockwise() {
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*
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int sourceWidth = image.getWidth();
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* @return true
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int sourceHeight = image.getHeight();
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*/
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@Override
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public boolean isRotateSupported() {
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return true;
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}
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@Override
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// Rotate 90 degrees counterclockwise.
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public LuminanceSource rotateCounterClockwise() {
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AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);
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int sourceWidth = image.getWidth();
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int sourceHeight = image.getHeight();
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// Rotate 90 degrees counterclockwise.
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// Note width/height are flipped since we are rotating 90 degrees.
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AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);
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BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
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// Note width/height are flipped since we are rotating 90 degrees.
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// Draw the original image into rotated, via transformation
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BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
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Graphics2D g = rotatedImage.createGraphics();
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g.drawImage(image, transform, null);
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g.dispose();
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// Draw the original image into rotated, via transformation
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// Maintain the cropped region, but rotate it too.
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Graphics2D g = rotatedImage.createGraphics();
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int width = getWidth();
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g.drawImage(image, transform, null);
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return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);
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g.dispose();
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}
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// Maintain the cropped region, but rotate it too.
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@Override
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int width = getWidth();
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public LuminanceSource rotateCounterClockwise45() {
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return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);
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int width = getWidth();
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}
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int height = getHeight();
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@Override
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int oldCenterX = left + width / 2;
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public LuminanceSource rotateCounterClockwise45() {
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int oldCenterY = top + height / 2;
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int width = getWidth();
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int height = getHeight();
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int oldCenterX = left + width / 2;
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// Rotate 45 degrees counterclockwise.
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int oldCenterY = top + height / 2;
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AffineTransform transform = AffineTransform.getRotateInstance(MINUS_45_IN_RADIANS, oldCenterX, oldCenterY);
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// Rotate 45 degrees counterclockwise.
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int sourceDimension = Math.max(image.getWidth(), image.getHeight());
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AffineTransform transform = AffineTransform.getRotateInstance(MINUS_45_IN_RADIANS, oldCenterX, oldCenterY);
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BufferedImage rotatedImage = new BufferedImage(sourceDimension, sourceDimension, BufferedImage.TYPE_BYTE_GRAY);
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int sourceDimension = Math.max(image.getWidth(), image.getHeight());
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// Draw the original image into rotated, via transformation
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BufferedImage rotatedImage = new BufferedImage(sourceDimension, sourceDimension, BufferedImage.TYPE_BYTE_GRAY);
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Graphics2D g = rotatedImage.createGraphics();
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g.drawImage(image, transform, null);
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g.dispose();
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// Draw the original image into rotated, via transformation
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int halfDimension = Math.max(width, height) / 2;
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Graphics2D g = rotatedImage.createGraphics();
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int newLeft = Math.max(0, oldCenterX - halfDimension);
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g.drawImage(image, transform, null);
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int newTop = Math.max(0, oldCenterY - halfDimension);
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g.dispose();
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int newRight = Math.min(sourceDimension - 1, oldCenterX + halfDimension);
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int newBottom = Math.min(sourceDimension - 1, oldCenterY + halfDimension);
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int halfDimension = Math.max(width, height) / 2;
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return new BufferedImageLuminanceSource(rotatedImage, newLeft, newTop, newRight - newLeft, newBottom - newTop);
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int newLeft = Math.max(0, oldCenterX - halfDimension);
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}
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int newTop = Math.max(0, oldCenterY - halfDimension);
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int newRight = Math.min(sourceDimension - 1, oldCenterX + halfDimension);
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int newBottom = Math.min(sourceDimension - 1, oldCenterY + halfDimension);
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return new BufferedImageLuminanceSource(rotatedImage, newLeft, newTop, newRight - newLeft, newBottom - newTop);
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}
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}
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}
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@ -174,6 +174,7 @@ public abstract class AbstractBlackBoxTestCase extends Assert {
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misreadCounts[x]++;
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misreadCounts[x]++;
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}
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}
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} catch (ReaderException re) {
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} catch (ReaderException re) {
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System.out.printf("could not read at rotation %f\n", rotation);
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// continue
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// continue
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}
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}
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try {
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try {
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@ -183,6 +184,7 @@ public abstract class AbstractBlackBoxTestCase extends Assert {
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tryHaderMisreadCounts[x]++;
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tryHaderMisreadCounts[x]++;
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}
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}
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} catch (ReaderException re) {
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} catch (ReaderException re) {
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System.out.printf("could not read at rotation %f w/TH\n", rotation);
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// continue
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// continue
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}
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}
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}
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}
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@ -27,10 +27,10 @@ public final class FalsePositives2BlackBoxTestCase extends AbstractNegativeBlack
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public FalsePositives2BlackBoxTestCase() {
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public FalsePositives2BlackBoxTestCase() {
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super("test/data/blackbox/falsepositives-2");
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super("test/data/blackbox/falsepositives-2");
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addTest(5, 0.0f);
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addTest(4, 0.0f);
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addTest(5, 90.0f);
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addTest(4, 90.0f);
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addTest(5, 180.0f);
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addTest(4, 180.0f);
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addTest(5, 270.0f);
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addTest(4, 270.0f);
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}
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}
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}
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}
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@ -27,8 +27,8 @@ public final class EAN13BlackBox1TestCase extends AbstractBlackBoxTestCase {
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public EAN13BlackBox1TestCase() {
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public EAN13BlackBox1TestCase() {
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super("test/data/blackbox/ean13-1", new MultiFormatReader(), BarcodeFormat.EAN_13);
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super("test/data/blackbox/ean13-1", new MultiFormatReader(), BarcodeFormat.EAN_13);
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addTest(29, 32, 0.0f);
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addTest(30, 32, 0.0f);
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addTest(28, 32, 180.0f);
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addTest(27, 32, 180.0f);
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}
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}
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}
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}
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@ -27,8 +27,8 @@ public final class UPCABlackBox5TestCase extends AbstractBlackBoxTestCase {
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public UPCABlackBox5TestCase() {
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public UPCABlackBox5TestCase() {
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super("test/data/blackbox/upca-5", new MultiFormatReader(), BarcodeFormat.UPC_A);
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super("test/data/blackbox/upca-5", new MultiFormatReader(), BarcodeFormat.UPC_A);
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addTest(19, 23, 1, 1, 0.0f);
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addTest(20, 23, 0, 0, 0.0f);
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addTest(21, 23, 0, 1, 180.0f);
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addTest(22, 23, 0, 0, 180.0f);
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}
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}
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}
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}
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@ -28,7 +28,7 @@ public final class QRCodeBlackBox2TestCase extends AbstractBlackBoxTestCase {
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public QRCodeBlackBox2TestCase() {
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public QRCodeBlackBox2TestCase() {
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super("test/data/blackbox/qrcode-2", new MultiFormatReader(), BarcodeFormat.QR_CODE);
|
super("test/data/blackbox/qrcode-2", new MultiFormatReader(), BarcodeFormat.QR_CODE);
|
||||||
addTest(30, 30, 0.0f);
|
addTest(30, 30, 0.0f);
|
||||||
addTest(30, 30, 90.0f);
|
addTest(29, 29, 90.0f);
|
||||||
addTest(30, 30, 180.0f);
|
addTest(30, 30, 180.0f);
|
||||||
addTest(29, 29, 270.0f);
|
addTest(29, 29, 270.0f);
|
||||||
}
|
}
|
||||||
|
|
|
||||||
|
|
@ -21,6 +21,7 @@ import com.google.zxing.LuminanceSource;
|
||||||
import java.awt.Graphics2D;
|
import java.awt.Graphics2D;
|
||||||
import java.awt.geom.AffineTransform;
|
import java.awt.geom.AffineTransform;
|
||||||
import java.awt.image.BufferedImage;
|
import java.awt.image.BufferedImage;
|
||||||
|
import java.awt.image.WritableRaster;
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* This LuminanceSource implementation is meant for J2SE clients and our blackbox unit tests.
|
* This LuminanceSource implementation is meant for J2SE clients and our blackbox unit tests.
|
||||||
|
|
@ -31,142 +32,187 @@ import java.awt.image.BufferedImage;
|
||||||
*/
|
*/
|
||||||
public final class BufferedImageLuminanceSource extends LuminanceSource {
|
public final class BufferedImageLuminanceSource extends LuminanceSource {
|
||||||
|
|
||||||
private final BufferedImage image;
|
private static final double MINUS_45_IN_RADIANS = -0.7853981633974483; // Math.toRadians(-45.0)
|
||||||
private final int left;
|
|
||||||
private final int top;
|
|
||||||
|
|
||||||
public BufferedImageLuminanceSource(BufferedImage image) {
|
private final BufferedImage image;
|
||||||
this(image, 0, 0, image.getWidth(), image.getHeight());
|
private final int left;
|
||||||
}
|
private final int top;
|
||||||
|
|
||||||
public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {
|
private static final boolean EXPLICIT_LUMINANCE_CONVERSION;
|
||||||
super(width, height);
|
static {
|
||||||
|
String property = System.getProperty("explicitLuminanceConversion");
|
||||||
int sourceWidth = image.getWidth();
|
if (property == null) {
|
||||||
int sourceHeight = image.getHeight();
|
property = System.getenv("EXPLICIT_LUMINANCE_CONVERSION");
|
||||||
if (left + width > sourceWidth || top + height > sourceHeight) {
|
|
||||||
throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
|
|
||||||
}
|
|
||||||
|
|
||||||
// The color of fully-transparent pixels is irrelevant. They are often, technically, fully-transparent
|
|
||||||
// black (0 alpha, and then 0 RGB). They are often used, of course as the "white" area in a
|
|
||||||
// barcode image. Force any such pixel to be white:
|
|
||||||
if (image.getAlphaRaster() != null) {
|
|
||||||
int[] buffer = new int[width];
|
|
||||||
for (int y = top; y < top + height; y++) {
|
|
||||||
image.getRGB(left, y, width, 1, buffer, 0, sourceWidth);
|
|
||||||
boolean rowChanged = false;
|
|
||||||
for (int x = 0; x < width; x++) {
|
|
||||||
if ((buffer[x] & 0xFF000000) == 0) {
|
|
||||||
buffer[x] = 0xFFFFFFFF; // = white
|
|
||||||
rowChanged = true;
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
if (rowChanged) {
|
EXPLICIT_LUMINANCE_CONVERSION = Boolean.parseBoolean(property);
|
||||||
image.setRGB(left, y, width, 1, buffer, 0, sourceWidth);
|
}
|
||||||
|
|
||||||
|
public BufferedImageLuminanceSource(BufferedImage image) {
|
||||||
|
this(image, 0, 0, image.getWidth(), image.getHeight());
|
||||||
|
}
|
||||||
|
|
||||||
|
public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {
|
||||||
|
super(width, height);
|
||||||
|
|
||||||
|
if (image.getType() == BufferedImage.TYPE_BYTE_GRAY) {
|
||||||
|
this.image = image;
|
||||||
|
} else {
|
||||||
|
int sourceWidth = image.getWidth();
|
||||||
|
int sourceHeight = image.getHeight();
|
||||||
|
if (left + width > sourceWidth || top + height > sourceHeight) {
|
||||||
|
throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
|
||||||
|
}
|
||||||
|
|
||||||
|
this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);
|
||||||
|
|
||||||
|
if (EXPLICIT_LUMINANCE_CONVERSION) {
|
||||||
|
|
||||||
|
WritableRaster raster = this.image.getRaster();
|
||||||
|
int[] buffer = new int[width];
|
||||||
|
for (int y = top; y < top + height; y++) {
|
||||||
|
image.getRGB(left, y, width, 1, buffer, 0, sourceWidth);
|
||||||
|
for (int x = 0; x < width; x++) {
|
||||||
|
int pixel = buffer[x];
|
||||||
|
|
||||||
|
// see comments in implicit branch
|
||||||
|
if ((pixel & 0xFF000000) == 0) {
|
||||||
|
pixel = 0xFFFFFFFF; // = white
|
||||||
|
}
|
||||||
|
|
||||||
|
int luminance = 0;
|
||||||
|
// .229R + 0.587G + 0.114B (YUV/YIQ for PAL and NTSC)
|
||||||
|
luminance = (306 * ((pixel >> 16) & 0xFF) +
|
||||||
|
601 * ((pixel >> 8) & 0xFF) +
|
||||||
|
117 * (pixel & 0xFF) +
|
||||||
|
(0x200)) >> 10; // 0x200 = 1<<9, half an lsb of the result to force rounding
|
||||||
|
buffer[x] = luminance;
|
||||||
|
}
|
||||||
|
raster.setPixels(left, y, width, 1, buffer);
|
||||||
|
}
|
||||||
|
|
||||||
|
} else {
|
||||||
|
|
||||||
|
// The color of fully-transparent pixels is irrelevant. They are often, technically, fully-transparent
|
||||||
|
// black (0 alpha, and then 0 RGB). They are often used, of course as the "white" area in a
|
||||||
|
// barcode image. Force any such pixel to be white:
|
||||||
|
if (image.getAlphaRaster() != null) {
|
||||||
|
int[] buffer = new int[width];
|
||||||
|
for (int y = top; y < top + height; y++) {
|
||||||
|
image.getRGB(left, y, width, 1, buffer, 0, sourceWidth);
|
||||||
|
boolean rowChanged = false;
|
||||||
|
for (int x = 0; x < width; x++) {
|
||||||
|
if ((buffer[x] & 0xFF000000) == 0) {
|
||||||
|
buffer[x] = 0xFFFFFFFF; // = white
|
||||||
|
rowChanged = true;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (rowChanged) {
|
||||||
|
image.setRGB(left, y, width, 1, buffer, 0, sourceWidth);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Create a grayscale copy, no need to calculate the luminance manually
|
||||||
|
this.image.getGraphics().drawImage(image, 0, 0, null);
|
||||||
|
|
||||||
|
}
|
||||||
}
|
}
|
||||||
}
|
this.left = left;
|
||||||
|
this.top = top;
|
||||||
}
|
}
|
||||||
|
|
||||||
// Create a grayscale copy, no need to calculate the luminance manually
|
@Override
|
||||||
this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);
|
public byte[] getRow(int y, byte[] row) {
|
||||||
this.image.getGraphics().drawImage(image, 0, 0, null);
|
if (y < 0 || y >= getHeight()) {
|
||||||
this.left = left;
|
throw new IllegalArgumentException("Requested row is outside the image: " + y);
|
||||||
this.top = top;
|
}
|
||||||
}
|
int width = getWidth();
|
||||||
|
if (row == null || row.length < width) {
|
||||||
@Override
|
row = new byte[width];
|
||||||
public byte[] getRow(int y, byte[] row) {
|
}
|
||||||
if (y < 0 || y >= getHeight()) {
|
// The underlying raster of image consists of bytes with the luminance values
|
||||||
throw new IllegalArgumentException("Requested row is outside the image: " + y);
|
image.getRaster().getDataElements(left, top + y, width, 1, row);
|
||||||
|
return row;
|
||||||
}
|
}
|
||||||
int width = getWidth();
|
|
||||||
if (row == null || row.length < width) {
|
@Override
|
||||||
row = new byte[width];
|
public byte[] getMatrix() {
|
||||||
|
int width = getWidth();
|
||||||
|
int height = getHeight();
|
||||||
|
int area = width * height;
|
||||||
|
byte[] matrix = new byte[area];
|
||||||
|
// The underlying raster of image consists of area bytes with the luminance values
|
||||||
|
image.getRaster().getDataElements(left, top, width, height, matrix);
|
||||||
|
return matrix;
|
||||||
}
|
}
|
||||||
// The underlying raster of image consists of bytes with the luminance values
|
|
||||||
image.getRaster().getDataElements(left, top + y, width, 1, row);
|
|
||||||
return row;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
@Override
|
||||||
public byte[] getMatrix() {
|
public boolean isCropSupported() {
|
||||||
int width = getWidth();
|
return true;
|
||||||
int height = getHeight();
|
}
|
||||||
int area = width * height;
|
|
||||||
byte[] matrix = new byte[area];
|
|
||||||
// The underlying raster of image consists of area bytes with the luminance values
|
|
||||||
image.getRaster().getDataElements(left, top, width, height, matrix);
|
|
||||||
return matrix;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
@Override
|
||||||
public boolean isCropSupported() {
|
public LuminanceSource crop(int left, int top, int width, int height) {
|
||||||
return true;
|
return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
|
||||||
}
|
}
|
||||||
|
|
||||||
@Override
|
/**
|
||||||
public LuminanceSource crop(int left, int top, int width, int height) {
|
* This is always true, since the image is a gray-scale image.
|
||||||
return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
|
*
|
||||||
}
|
* @return true
|
||||||
|
*/
|
||||||
|
@Override
|
||||||
|
public boolean isRotateSupported() {
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
/**
|
@Override
|
||||||
* This is always true, since the image is a gray-scale image.
|
public LuminanceSource rotateCounterClockwise() {
|
||||||
*
|
int sourceWidth = image.getWidth();
|
||||||
* @return true
|
int sourceHeight = image.getHeight();
|
||||||
*/
|
|
||||||
@Override
|
|
||||||
public boolean isRotateSupported() {
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
// Rotate 90 degrees counterclockwise.
|
||||||
public LuminanceSource rotateCounterClockwise() {
|
AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);
|
||||||
int sourceWidth = image.getWidth();
|
|
||||||
int sourceHeight = image.getHeight();
|
|
||||||
|
|
||||||
// Rotate 90 degrees counterclockwise.
|
// Note width/height are flipped since we are rotating 90 degrees.
|
||||||
AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);
|
BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
|
||||||
|
|
||||||
// Note width/height are flipped since we are rotating 90 degrees.
|
// Draw the original image into rotated, via transformation
|
||||||
BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
|
Graphics2D g = rotatedImage.createGraphics();
|
||||||
|
g.drawImage(image, transform, null);
|
||||||
|
g.dispose();
|
||||||
|
|
||||||
// Draw the original image into rotated, via transformation
|
// Maintain the cropped region, but rotate it too.
|
||||||
Graphics2D g = rotatedImage.createGraphics();
|
int width = getWidth();
|
||||||
g.drawImage(image, transform, null);
|
return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);
|
||||||
g.dispose();
|
}
|
||||||
|
|
||||||
// Maintain the cropped region, but rotate it too.
|
@Override
|
||||||
int width = getWidth();
|
public LuminanceSource rotateCounterClockwise45() {
|
||||||
return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);
|
int width = getWidth();
|
||||||
}
|
int height = getHeight();
|
||||||
|
|
||||||
@Override
|
int oldCenterX = left + width / 2;
|
||||||
public LuminanceSource rotateCounterClockwise45() {
|
int oldCenterY = top + height / 2;
|
||||||
int width = getWidth();
|
|
||||||
int height = getHeight();
|
|
||||||
|
|
||||||
int oldCenterX = left + width / 2;
|
// Rotate 45 degrees counterclockwise.
|
||||||
int oldCenterY = top + height / 2;
|
AffineTransform transform = AffineTransform.getRotateInstance(MINUS_45_IN_RADIANS, oldCenterX, oldCenterY);
|
||||||
|
|
||||||
// Rotate 45 degrees counterclockwise.
|
int sourceDimension = Math.max(image.getWidth(), image.getHeight());
|
||||||
AffineTransform transform = AffineTransform.getRotateInstance(Math.toRadians(-45.0), oldCenterX, oldCenterY);
|
BufferedImage rotatedImage = new BufferedImage(sourceDimension, sourceDimension, BufferedImage.TYPE_BYTE_GRAY);
|
||||||
|
|
||||||
int sourceDimension = Math.max(image.getWidth(), image.getHeight());
|
// Draw the original image into rotated, via transformation
|
||||||
BufferedImage rotatedImage = new BufferedImage(sourceDimension, sourceDimension, BufferedImage.TYPE_BYTE_GRAY);
|
Graphics2D g = rotatedImage.createGraphics();
|
||||||
|
g.drawImage(image, transform, null);
|
||||||
|
g.dispose();
|
||||||
|
|
||||||
// Draw the original image into rotated, via transformation
|
int halfDimension = Math.max(width, height) / 2;
|
||||||
Graphics2D g = rotatedImage.createGraphics();
|
int newLeft = Math.max(0, oldCenterX - halfDimension);
|
||||||
g.drawImage(image, transform, null);
|
int newTop = Math.max(0, oldCenterY - halfDimension);
|
||||||
g.dispose();
|
int newRight = Math.min(sourceDimension - 1, oldCenterX + halfDimension);
|
||||||
|
int newBottom = Math.min(sourceDimension - 1, oldCenterY + halfDimension);
|
||||||
|
|
||||||
int halfDimension = Math.max(width, height) / 2;
|
return new BufferedImageLuminanceSource(rotatedImage, newLeft, newTop, newRight - newLeft, newBottom - newTop);
|
||||||
int newLeft = Math.max(0, oldCenterX - halfDimension);
|
}
|
||||||
int newTop = Math.max(0, oldCenterY - halfDimension);
|
|
||||||
int newRight = Math.min(sourceDimension - 1, oldCenterX + halfDimension);
|
|
||||||
int newBottom = Math.min(sourceDimension - 1, oldCenterY + halfDimension);
|
|
||||||
|
|
||||||
return new BufferedImageLuminanceSource(rotatedImage, newLeft, newTop, newRight - newLeft, newBottom - newTop);
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue