File talk:Ondelette schema de compression.png
Code Java (langage) ayant cervi à la générations des image
[edit]
package org.wikipedia;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.ColorModel;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.io.File;
import javax.imageio.ImageWriter;
import javax.imageio.stream.FileImageOutputStream;
import javax.imageio.stream.ImageOutputStream;
import javax.swing.ImageIcon;
import javax.swing.JApplet;
import com.sun.imageio.plugins.png.PNGImageWriterSpi;
/**
* @author sbrunner
* Create on 6 janv. 2005
*/
public class Ondelettes {
private static final int MULTIPLIER = 2;
public static void main(String s[]) {
BufferedImage bi = open("/home/sbrunner/Desktop/imgstartb.png");
int iw = bi.getWidth();
int ih = bi.getWidth();
save(new OndeOP().filter(bi, new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB)), "/home/sbrunner/Desktop/img-vertical.png");
save(new OndeOP(1).filter(bi, new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB)), "/home/sbrunner/Desktop/img-1.png");
save(new OndeOP(2).filter(bi, new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB)), "/home/sbrunner/Desktop/img-2.png");
save(new OndeOP(-1).filter(bi, new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB)), "/home/sbrunner/Desktop/img-all.png");
}
private static BufferedImage open(String pFileName) {
ImageIcon imageIcon =new ImageIcon(pFileName);
Image img = imageIcon.getImage();
int iw = imageIcon.getIconWidth();
int ih = imageIcon.getIconHeight();
BufferedImage result = new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
Graphics2D big = result.createGraphics();
big.drawImage(img,0,0,null);
return result;
}
private static void save(BufferedImage pImage, String pFileName) {
try {
ImageOutputStream out = new FileImageOutputStream(new File(pFileName));
ImageWriter encoder = new PNGImageWriterSpi().createWriterInstance();
encoder.setOutput(out);
encoder.write(pImage);
out.close();
}
catch (Exception e) {
e.printStackTrace();
}
}
private static class OndeOP extends AbstractOP {
int mNbPass;
boolean pDoVertical = true;
public OndeOP(int nbPass) {
mNbPass = nbPass;
}
public OndeOP() {
mNbPass = 1;
pDoVertical = false;
}
public final WritableRaster filter (Raster pSrc, WritableRaster pDst) {
int numBands = pSrc.getNumBands();
int totalLength = pSrc.getWidth();
//int width = pSrc.getWidth();
//int height = pSrc.getHeight();
Raster src = pSrc;
WritableRaster dst = new BufferedImage(totalLength, totalLength, BufferedImage.TYPE_INT_RGB).getRaster();
int length = totalLength;
for (int p = 0 ; (p < mNbPass || mNbPass < 0) && length > 1; p++) {
for (int y=0; y < length; y++) {
for (int x = 0; x < length / 2; x++) {
int[] pix = new int[numBands];
// Get data for all bands at this x,y position
int[] p1 = src.getPixel(2*x, y, new int[numBands]);
int[] p2 = src.getPixel(2*x+1, y, new int[numBands]);
for (int z=0; z<numBands; z++) {
pix[z] = (p1[z] + p2[z]) / 2;
}
// Put it back for all bands
dst.setPixel(x, y, pix);
}
for (int x = 0; x < length / 2; x++) {
int[] pix = new int[numBands];
// Get data for all bands at this x,y position
int[] p1 = src.getPixel(2*x, y, new int[numBands]);
int[] p2 = src.getPixel(2*x+1, y, new int[numBands]);
for (int z=0; z<numBands; z++) {
pix[z] = 255 - MULTIPLIER * Math.abs(p1[z] - p2[z]) / 2;
}
// Put it back for all bands
dst.setPixel(length / 2 + x, y, pix);
}
}
cpNext(src, dst, length);
src = dst;
boolean last = p == mNbPass - 1 || length == 2;
dst = last ? pDst : new BufferedImage(totalLength, totalLength, BufferedImage.TYPE_INT_RGB).getRaster();
if (pDoVertical) {
for (int x = 0; x < length; x++) {
for (int y=0; y < length / 2; y++) {
int[] pix = new int[numBands];
// Get data for all bands at this x,y position
int[] p1 = src.getPixel(x, 2*y, new int[numBands]);
int[] p2 = src.getPixel(x, 2*y+1, new int[numBands]);
for (int z=0; z<numBands; z++) {
pix[z] = (p1[z] + p2[z]) / 2;
}
// Put it back for all bands
dst.setPixel(x, y, pix);
}
for (int y=0; y < length / 2; y++) {
int[] pix = new int[numBands];
// Get data for all bands at this x,y position
int[] p1 = src.getPixel(x, 2*y, new int[numBands]);
int[] p2 = src.getPixel(x, 2*y+1, new int[numBands]);
for (int z=0; z<numBands; z++) {
pix[z] = 255 - MULTIPLIER * Math.abs(p1[z] - p2[z]) / 2;
}
// Put it back for all bands
dst.setPixel(x, length / 2 + y, pix);
}
}
cpNext(src, dst, length);
}
else {
for (int x = 0; x < totalLength; x++) {
for (int y=0; y < totalLength; y++) {
dst.setPixel(x, y, src.getPixel(x, y, new int[numBands]));
}
}
}
length /= 2;
if (!last) {
src = dst;
dst = new BufferedImage(totalLength, totalLength, BufferedImage.TYPE_INT_RGB).getRaster();
}
}
return pDst;
}
private void cpNext(Raster src, WritableRaster dst, int length) {
int numBands = src.getNumBands();
int totalLength = src.getWidth();
for (int x = length; x < totalLength; x++) {
for (int y=0; y < totalLength; y++) {
dst.setPixel(x, y, src.getPixel(x, y, new int[numBands]));
}
}
for (int x = 0; x < length; x++) {
for (int y=length; y < totalLength; y++) {
dst.setPixel(x, y, src.getPixel(x, y, new int[numBands]));
}
}
}
}
private static abstract class AbstractOP implements BufferedImageOp {
public abstract WritableRaster filter (Raster src, WritableRaster dst);
public final BufferedImage filter (BufferedImage src, BufferedImage dst) {
filter(src.getRaster(), dst.getRaster());
return dst;
}
public final Rectangle2D getBounds2D (BufferedImage src) {
return getBounds2D(src.getRaster());
}
public final Rectangle2D getBounds2D (Raster src) {
return src.getBounds();
}
public BufferedImage createCompatibleDestImage (BufferedImage src,
ColorModel destCM) {
return null;
}
public WritableRaster createCompatibleDestRaster (Raster src) {
return src.createCompatibleWritableRaster(src.getWidth(), src.getHeight());
}
public final Point2D getPoint2D (Point2D srcPt, Point2D dstPt) {
if (dstPt == null) {
dstPt = new Point2D.Float();
}
dstPt.setLocation(srcPt.getX(), srcPt.getY());
return dstPt;
}
public final RenderingHints getRenderingHints() {
return null;
}
}
}
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orthographe
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il manque un "u" à Quantification, il me semble, quelque part... et le titre de l'image aurait pas un "t" en trop quelque part ? à schemaT ? --Moala 20 juillet 2005 à 11:21 (CEST)
