public BufferedImage filter(BufferedImage src, BufferedImage dst) {
int width = src.getWidth();
int height = src.getHeight();
int type = src.getType();
WritableRaster srcRaster = src.getRaster();
originalSpace = new Rectangle(0, 0, width, height);
transformedSpace = new Rectangle(0, 0, width, height);
transformSpace(transformedSpace);
if (dst == null) {
ColorModel dstCM = src.getColorModel();
dst =
new BufferedImage(
dstCM,
dstCM.createCompatibleWritableRaster(transformedSpace.width, transformedSpace.height),
dstCM.isAlphaPremultiplied(),
null);
}
WritableRaster dstRaster = dst.getRaster();
int[] inPixels = getRGB(src, 0, 0, width, height, null);
inPixels = filterPixels(width, height, inPixels, transformedSpace);
setRGB(dst, 0, 0, transformedSpace.width, transformedSpace.height, inPixels);
return dst;
}
public BufferedImage createCompatibleDestImage(BufferedImage src, ColorModel dstCM) {
if (dstCM == null) dstCM = src.getColorModel();
return new BufferedImage(
dstCM,
dstCM.createCompatibleWritableRaster(src.getWidth(), src.getHeight()),
dstCM.isAlphaPremultiplied(),
null);
}
public int filterRGB(int x, int y, int rgb) {
int R, G, B, color;
ColorModel cm = ColorModel.getRGBdefault();
if (x == -1) ;
R = cm.getRed(rgb) & 0xff;
G = cm.getGreen(rgb) & 0xff;
B = cm.getBlue(rgb) & 0xff;
if (R >= 100 && G >= 100 && B >= 100) color = 0xffffffff;
else color = 0xff000000;
return color;
}
public final BufferedImage filter(BufferedImage src, BufferedImage dst) {
if (src == dst) {
// awt.252=Source can't be same as the destination
throw new IllegalArgumentException(Messages.getString("awt.252")); // $NON-NLS-1$
}
ColorModel srcCM = src.getColorModel();
BufferedImage finalDst = null;
if (srcCM instanceof IndexColorModel
&& (iType != TYPE_NEAREST_NEIGHBOR || srcCM.getPixelSize() % 8 != 0)) {
src = ((IndexColorModel) srcCM).convertToIntDiscrete(src.getRaster(), true);
srcCM = src.getColorModel();
}
if (dst == null) {
dst = createCompatibleDestImage(src, srcCM);
} else {
if (!srcCM.equals(dst.getColorModel())) {
// Treat BufferedImage.TYPE_INT_RGB and
// BufferedImage.TYPE_INT_ARGB as same
if (!((src.getType() == BufferedImage.TYPE_INT_RGB
|| src.getType() == BufferedImage.TYPE_INT_ARGB)
&& (dst.getType() == BufferedImage.TYPE_INT_RGB
|| dst.getType() == BufferedImage.TYPE_INT_ARGB))) {
finalDst = dst;
dst = createCompatibleDestImage(src, srcCM);
}
}
}
// Skip alpha channel for TYPE_INT_RGB images
if (slowFilter(src.getRaster(), dst.getRaster()) != 0) {
// awt.21F=Unable to transform source
throw new ImagingOpException(Messages.getString("awt.21F")); // $NON-NLS-1$
// TODO - uncomment
// if (ippFilter(src.getRaster(), dst.getRaster(), src.getType()) !=
// 0)
// throw new ImagingOpException ("Unable to transform source");
}
if (finalDst != null) {
Graphics2D g = finalDst.createGraphics();
g.setComposite(AlphaComposite.Src);
g.drawImage(dst, 0, 0, null);
} else {
finalDst = dst;
}
return finalDst;
}
/**
* Makes the Mandelbrot image.
*
* @param width the width
* @parah height the height
* @return the image
*/
public BufferedImage makeMandelbrot(int width, int height) {
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
WritableRaster raster = image.getRaster();
ColorModel model = image.getColorModel();
Color fractalColor = Color.red;
int argb = fractalColor.getRGB();
Object colorData = model.getDataElements(argb, null);
for (int i = 0; i < width; i++)
for (int j = 0; j < height; j++) {
double a = XMIN + i * (XMAX - XMIN) / width;
double b = YMIN + j * (YMAX - YMIN) / height;
if (!escapesToInfinity(a, b)) raster.setDataElements(i, j, colorData);
}
return image;
}
// This method returns true if the specified image has transparent pixels
// Source: http://www.exampledepot.com/egs/java.awt.image/HasAlpha.html
public static boolean hasAlpha(Image image) {
// If buffered image, the color model is readily available
if (image instanceof BufferedImage) {
BufferedImage bimage = (BufferedImage) image;
return bimage.getColorModel().hasAlpha();
}
// Use a pixel grabber to retrieve the image's color model;
// grabbing a single pixel is usually sufficient
PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
try {
pg.grabPixels();
} catch (InterruptedException e) {
}
// Get the image's color model
ColorModel cm = pg.getColorModel();
return cm.hasAlpha();
}
public BufferedImage filter(BufferedImage src, BufferedImage dst) {
int w = src.getWidth();
int h = src.getHeight();
if (dst == null) {
ColorModel dstCM = src.getColorModel();
dst =
new BufferedImage(
dstCM,
dstCM.createCompatibleWritableRaster(width, height),
dstCM.isAlphaPremultiplied(),
null);
}
Graphics2D g = dst.createGraphics();
g.drawRenderedImage(src, AffineTransform.getTranslateInstance(-x, -y));
g.dispose();
return dst;
}
public class Test extends Applet {
private ColorModel defaultRGB = ColorModel.getRGBdefault();
private Image image;
private int imw, imh, pixels[];
public void init() {
MediaTracker mt = new MediaTracker(this);
URL url = getClass().getResource("tiger.gif");
try {
image = createImage((ImageProducer) url.getContent());
mt.addImage(image, 0);
mt.waitForID(0);
} catch (Exception e) {
e.printStackTrace();
}
imw = image.getWidth(this);
imh = image.getWidth(this);
pixels = new int[imw * imh];
try {
PixelGrabber pg = new PixelGrabber(image, 0, 0, imw, imh, pixels, 0, imw);
pg.grabPixels();
} catch (InterruptedException e) {
e.printStackTrace();
}
addMouseMotionListener(
new MouseMotionAdapter() {
public void mouseMoved(MouseEvent e) {
int mx = e.getX(), my = e.getY();
if (mx > 0 && mx < imw && my > 0 && my < imh) {
int pixel = ((int[]) pixels)[my * imw + mx];
int red = defaultRGB.getRed(pixel),
green = defaultRGB.getGreen(pixel),
blue = defaultRGB.getBlue(pixel),
alpha = defaultRGB.getAlpha(pixel);
showStatus("red=" + red + " green=" + green + " blue=" + blue + " alpha=" + alpha);
}
}
});
}
public void paint(Graphics g) {
Insets insets = getInsets();
g.drawImage(image, insets.left, insets.top, this);
}
}
// ///////////////////////////////////////////////////////////////
// 双线性内插值算法
// 参数：img：要缩放的Image对象
// dstW:目标图像宽
// dstH:目标图像高
// comp：组件参数，比如Applet
//
// 公式：f(i+u,j+v) = (1-u)(1-v)f(i,j) + (1-u)vf(i,j+1) + u(1-v)f(i+1,j) +
// uvf(i+1,j+1)
//
// ///////////////////////////////////////////////////////////////
public static Image doubleLinearScale(Image img, int dstW, int dstH) {
OperateImage OI = new OperateImage();
Image imgTemp;
int[] scaled, src;
int srcW, srcH;
int R, G, B;
double widthFactor, heightFactor, tempX, tempY;
// double srcX_float = 0.0, srcY_float = 0.0;// 坐标的小数部分
// int srcX_int = 0, srcY_int = 0;// 坐标的整数部分
src = OI.takeImg(img, img.getWidth(null), img.getHeight(null));
ColorModel cm = ColorModel.getRGBdefault();
for (int j = 0; j < src.length; j++) {
R = cm.getRed(src[j]);
G = cm.getGreen(src[j]);
B = cm.getBlue(src[j]);
if (R >= 200 && G >= 200 && B >= 200) src[j] = 0xffffffff;
else src[j] = 0xff000000;
}
scaled = new int[dstW * dstH]; // 存放缩放后的图片
srcW = img.getWidth(null);
srcH = img.getHeight(null);
widthFactor = srcW / (dstW + 0.0);
// System.out.println("widthFactor:"+widthFactor);
heightFactor = srcH / (dstH + 0.0);
// System.out.println("heightFactor:"+heightFactor);
for (int a = 0; a < dstH; a++)
for (int b = 0; b < dstW; b++) {
tempX = b * widthFactor;
tempY = a * heightFactor;
scaled[a * dstW + b] = getDestPixle(src, srcW, srcH, tempX, tempY);
}
// System.out.println("双线性内插值算法完成！");
imgTemp = OI.madeImg(scaled, dstW, dstH);
ImageFilter filter = new BWFilter();
return Toolkit.getDefaultToolkit()
.createImage(new FilteredImageSource(imgTemp.getSource(), filter));
// return imgTemp;
}
/**
* PS see http://astronomy.swin.edu.au/~pbourke/geomformats/postscript/ Java
* http://show.docjava.com:8086/book/cgij/doc/ip/graphics/SimpleImageFrame.java.html
*/
public boolean drawImage(
Image img, int x, int y, int width, int height, Color bgcolor, ImageObserver observer) {
try {
// get data from image
int[] pixels = new int[width * height];
PixelGrabber grabber = new PixelGrabber(img, 0, 0, width, height, pixels, 0, width);
grabber.grabPixels();
ColorModel model = ColorModel.getRGBdefault();
// print data to ps
m_printstream.println("gsave");
m_printstream.println(
xTransform(xScale(x)) + " " + (yTransform(yScale(y)) - yScale(height)) + " translate");
m_printstream.println(xScale(width) + " " + yScale(height) + " scale");
m_printstream.println(
width + " " + height + " " + "8" + " [" + width + " 0 0 " + (-height) + " 0 " + height
+ "]");
m_printstream.println("{<");
int index;
for (int i = 0; i < height; i++) {
for (int j = 0; j < width; j++) {
index = i * width + j;
m_printstream.print(toHex(model.getRed(pixels[index])));
m_printstream.print(toHex(model.getGreen(pixels[index])));
m_printstream.print(toHex(model.getBlue(pixels[index])));
}
m_printstream.println();
}
m_printstream.println(">}");
m_printstream.println("false 3 colorimage");
m_printstream.println("grestore");
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
public BufferedImage createCompatibleDestImage(BufferedImage src, ColorModel destCM) {
Rectangle2D newBounds = getBounds2D(src);
// Destination image should include (0,0) + positive part
// of the area bounded by newBounds (in source coordinate system).
double dstWidth = newBounds.getX() + newBounds.getWidth();
double dstHeight = newBounds.getY() + newBounds.getHeight();
if (dstWidth <= 0 || dstHeight <= 0) {
// awt.251=Transformed width ({0}) and height ({1}) should be
// greater than 0
throw new RasterFormatException(
Messages.getString("awt.251", dstWidth, dstHeight)); // $NON-NLS-1$
}
if (destCM != null) {
return new BufferedImage(
destCM,
destCM.createCompatibleWritableRaster((int) dstWidth, (int) dstHeight),
destCM.isAlphaPremultiplied(),
null);
}
ColorModel cm = src.getColorModel();
// Interpolation other than NN doesn't make any sense for index color
if (iType != TYPE_NEAREST_NEIGHBOR && cm instanceof IndexColorModel) {
return new BufferedImage((int) dstWidth, (int) dstHeight, BufferedImage.TYPE_INT_ARGB);
}
// OK, we can get source color model
return new BufferedImage(
cm,
src.getRaster().createCompatibleWritableRaster((int) dstWidth, (int) dstHeight),
cm.isAlphaPremultiplied(),
null);
}
public static void main(String args[]) {
try {
ICC_Profile inProfile =
ICC_Profile.getInstance("/System/Library/ColorSync/Profiles/AdobeRGB1998.icc");
ICC_Profile outProfile =
ICC_Profile.getInstance("/Library/ColorSync/Profiles/CIE 1931 D50 Gamma 1.icm");
Profile cmsOutProfile = new Profile(outProfile);
Profile cmsInProfile = new Profile(inProfile);
BufferedImage inputImage = ImageIO.read(new File("/Stuff/Reference/small-q60-adobergb.TIF"));
ShortInterleavedRaster inputRaster = (ShortInterleavedRaster) inputImage.getTile(0, 0);
ColorSpace outCS = new ICC_ColorSpace(outProfile);
ColorModel outCM =
new ComponentColorModel(outCS, false, false, Transparency.OPAQUE, DataBuffer.TYPE_USHORT);
ShortInterleavedRaster outputRaster =
(ShortInterleavedRaster)
outCM.createCompatibleWritableRaster(inputImage.getWidth(), inputImage.getHeight());
BufferedImage outputImage = new BufferedImage(outCM, outputRaster, false, null);
Transform cmsTransform =
new Transform(
cmsInProfile, TYPE_RGB_16, cmsOutProfile, TYPE_RGB_16, INTENT_PERCEPTUAL, 0);
cmsTransform.doTransform(inputRaster, outputRaster);
ImageIO.write(outputImage, "TIF", new File("/Stuff/small-q60-CIED65.TIF"));
cmsTransform.dispose();
cmsOutProfile.dispose();
cmsInProfile.dispose();
// System.out.println("Profile: " + hProfile + ", " + );
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Paint the image onto a Graphics object. The painting is performed tile-by-tile, and includes a
* grey region covering the unused portion of image tiles as well as the general background. At
* this point the image must be byte data.
*/
public synchronized void paintComponent(Graphics g) {
Graphics2D g2D = null;
if (g instanceof Graphics2D) {
g2D = (Graphics2D) g;
} else {
return;
}
// if source is null, it's just a component
if (source == null) {
g2D.setColor(getBackground());
g2D.fillRect(0, 0, componentWidth, componentHeight);
return;
}
int transX = -originX;
int transY = -originY;
// Get the clipping rectangle and translate it into image coordinates.
Rectangle clipBounds = g.getClipBounds();
if (clipBounds == null) {
clipBounds = new Rectangle(0, 0, componentWidth, componentHeight);
}
// clear the background (clip it) [minimal optimization here]
if (transX > 0
|| transY > 0
|| transX < (componentWidth - source.getWidth())
|| transY < (componentHeight - source.getHeight())) {
g2D.setColor(getBackground());
g2D.fillRect(0, 0, componentWidth, componentHeight);
}
clipBounds.translate(-transX, -transY);
// Determine the extent of the clipping region in tile coordinates.
int txmin, txmax, tymin, tymax;
int ti, tj;
txmin = XtoTileX(clipBounds.x);
txmin = Math.max(txmin, minTileX);
txmin = Math.min(txmin, maxTileX);
txmax = XtoTileX(clipBounds.x + clipBounds.width - 1);
txmax = Math.max(txmax, minTileX);
txmax = Math.min(txmax, maxTileX);
tymin = YtoTileY(clipBounds.y);
tymin = Math.max(tymin, minTileY);
tymin = Math.min(tymin, maxTileY);
tymax = YtoTileY(clipBounds.y + clipBounds.height - 1);
tymax = Math.max(tymax, minTileY);
tymax = Math.min(tymax, maxTileY);
Insets insets = getInsets();
// Loop over tiles within the clipping region
for (tj = tymin; tj <= tymax; tj++) {
for (ti = txmin; ti <= txmax; ti++) {
int tx = TileXtoX(ti);
int ty = TileYtoY(tj);
Raster tile = source.getTile(ti, tj);
if (tile != null) {
DataBuffer dataBuffer = tile.getDataBuffer();
WritableRaster wr = tile.createWritableRaster(sampleModel, dataBuffer, null);
BufferedImage bi =
new BufferedImage(colorModel, wr, colorModel.isAlphaPremultiplied(), null);
// correctly handles band offsets
if (brightnessEnabled == true) {
SampleModel sm =
sampleModel.createCompatibleSampleModel(tile.getWidth(), tile.getHeight());
WritableRaster raster = RasterFactory.createWritableRaster(sm, null);
BufferedImage bimg =
new BufferedImage(colorModel, raster, colorModel.isAlphaPremultiplied(), null);
// don't move this code
ByteLookupTable lutTable = new ByteLookupTable(0, lutData);
LookupOp lookup = new LookupOp(lutTable, null);
lookup.filter(bi, bimg);
g2D.drawImage(bimg, biop, tx + transX + insets.left, ty + transY + insets.top);
} else {
AffineTransform transform;
transform =
AffineTransform.getTranslateInstance(
tx + transX + insets.left, ty + transY + insets.top);
g2D.drawRenderedImage(bi, transform);
}
}
}
}
}
@Override
protected void computeRect(Raster[] sources, WritableRaster dest, Rectangle destRect) {
synchronized (this) {
if (transform == null) {
int lcms_intent =
intent.getValue() < 4 ? intent.getValue() : LCMS.INTENT_RELATIVE_COLORIMETRIC;
int lcms_proofIntent =
proofIntent.getValue() < 4 ? proofIntent.getValue() : LCMS.INTENT_RELATIVE_COLORIMETRIC;
int lcms_flags =
intent.getValue() == 4 || proofIntent.getValue() == 4
? LCMS.cmsFLAGS_BLACKPOINTCOMPENSATION
: 0;
ColorSpace sourceCS = source.getColorModel().getColorSpace();
LCMS.Profile sourceProfile =
sourceCS instanceof LCMS_ColorSpace
? ((LCMS_ColorSpace) sourceCS).getProfile()
: new LCMS.Profile(((ICC_ColorSpace) sourceCS).getProfile());
ColorSpace targetCS = targetColorModel.getColorSpace();
LCMS.Profile targetProfile =
targetCS instanceof LCMS_ColorSpace
? ((LCMS_ColorSpace) targetCS).getProfile()
: new LCMS.Profile(((ICC_ColorSpace) targetCS).getProfile());
LCMS.Profile proofProfile = proof != null ? new LCMS.Profile(proof) : null;
int inType = mapLCMSType(sourceCS.getType(), source.getColorModel().getTransferType());
int outType = mapLCMSType(targetCS.getType(), colorModel.getTransferType());
transform =
proofProfile != null
? new LCMS.Transform(
sourceProfile,
inType,
targetProfile,
outType,
proofProfile,
lcms_proofIntent,
lcms_intent,
lcms_flags)
: new LCMS.Transform(
sourceProfile, inType, targetProfile, outType, lcms_intent, lcms_flags);
}
}
RasterFormatTag[] formatTags = getFormatTags();
Rectangle srcRect = mapDestRect(destRect, 0);
RasterAccessor src =
new RasterAccessor(sources[0], srcRect, formatTags[0], getSourceImage(0).getColorModel());
RasterAccessor dst = new RasterAccessor(dest, destRect, formatTags[1], this.getColorModel());
if (src.getDataType() == dst.getDataType()) {
transform.doTransform(
src,
formatTags[0],
getSourceImage(0).getColorModel(),
dst,
formatTags[1],
this.getColorModel());
} else {
throw new IllegalArgumentException("Input and output rasters don't match!");
}
}
public void actionPerformed(ActionEvent evt) {
Graphics g = getGraphics();
if (evt.getSource() == openItem) {
JFileChooser chooser = new JFileChooser();
common.chooseFile(chooser, "./images", 0); // 设置默认目录,过滤文件
int r = chooser.showOpenDialog(null);
if (r == JFileChooser.APPROVE_OPTION) {
String name = chooser.getSelectedFile().getAbsolutePath();
// 装载图像
iImage = common.openImage(name, new MediaTracker(this));
// 取载入图像的宽和高
iw = iImage.getWidth(null);
ih = iImage.getHeight(null);
bImage = new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = bImage.createGraphics();
g2.drawImage(iImage, 0, 0, null);
loadflag = true;
repaint();
}
} else if (evt.getSource() == rotateItem) // 内置旋转
{
setTitle("第4章 图像几何变换 内置旋转 作者 孙燮华");
common.draw(g, iImage, bImage, common.getParam("旋转角(度):", "30"), 0, 0);
} else if (evt.getSource() == scaleItem) // 内置缩放
{
setTitle("第4章 图像几何变换 内置缩放 作者 孙燮华");
// 参数选择面板
Parameters pp = new Parameters("参数", "x方向:", "y方向:", "1.5", "1.5");
setPanel(pp, "内置缩放");
float x = pp.getPadx();
float y = pp.getPady();
common.draw(g, iImage, bImage, x, y, 1);
} else if (evt.getSource() == shearItem) // 内置错切
{
setTitle("第4章 图像几何变换 内置错切 作者 孙燮华");
Parameters pp = new Parameters("参数", "x方向:", "y方向:", "0.5", "0.5");
setPanel(pp, "内置错切");
float x = pp.getPadx();
float y = pp.getPady();
common.draw(g, iImage, bImage, x, y, 2);
} else if (evt.getSource() == transItem) // 内置平移
{
setTitle("第4章 图像几何变换 内置平移 作者 孙燮华");
Parameters pp = new Parameters("参数", "x方向:", "y方向:", "100", "50");
setPanel(pp, "内置平移");
float x = pp.getPadx();
float y = pp.getPady();
common.draw(g, iImage, bImage, x, y, 3);
} else if (evt.getSource() == rotItem) // 旋转算法
{
setTitle("第4章 图像几何变换 旋转算法 作者 孙燮华");
pix = common.grabber(iImage, iw, ih);
// 旋转,输出图像宽高
int owh = (int) (Math.sqrt(iw * iw + ih * ih + 0.5));
opix = geom.imRotate(pix, common.getParam("旋转角(度):", "30"), iw, ih, owh);
// 将数组中的象素产生一个图像
MemoryImageSource memoryImage =
new MemoryImageSource(owh, owh, ColorModel.getRGBdefault(), opix, 0, owh);
oImage = createImage(memoryImage);
common.draw(g, iImage, oImage, iw, ih, owh, 4);
} else if (evt.getSource() == mirItem) // 镜象算法(type:5)
{
setTitle("第4章 图像几何变换 镜象算法 作者 孙燮华");
Parameters pp = new Parameters("选择镜象类型", "水平", "垂直");
setPanel(pp, "镜象算法");
pix = common.grabber(iImage, iw, ih);
opix = geom.imMirror(pix, iw, ih, pp.getRadioState());
ImageProducer ip = new MemoryImageSource(iw, ih, opix, 0, iw);
oImage = createImage(ip);
common.draw(g, iImage, oImage, iw, ih, 0, 5);
} else if (evt.getSource() == shrItem) // 错切算法(type:6)
{
setTitle("第4章 图像几何变换 错切算法 作者 孙燮华");
Parameters pp = new Parameters("参数", "x方向:", "y方向:", "0.5", "0.5");
setPanel(pp, "错切算法");
pix = common.grabber(iImage, iw, ih);
float shx = pp.getPadx();
float shy = pp.getPady();
// 计算包围盒的宽和高
int ow = (int) (iw + (ih - 1) * shx);
int oh = (int) ((iw - 1) * shy + ih);
if (shx > 0 && shy > 0) {
opix = geom.imShear(pix, shx, shy, iw, ih, ow, oh);
ImageProducer ip = new MemoryImageSource(ow, oh, opix, 0, ow);
oImage = createImage(ip);
common.draw(g, iImage, oImage, iw, ih, 0, 6);
} else JOptionPane.showMessageDialog(null, "参数必须为正数!");
} else if (evt.getSource() == trnItem) {
setTitle("第4章 图像几何变换 平移算法 作者 孙燮华");
Parameters pp = new Parameters("参数", "x方向:", "y方向:", "100", "50");
setPanel(pp, "平移算法");
pix = common.grabber(iImage, iw, ih);
int tx = (int) pp.getPadx();
int ty = (int) pp.getPady();
if (tx > 0 && ty > 0) {
int ow = iw + tx;
int oh = ih + ty;
opix = geom.imTrans(pix, tx, ty, iw, ih, ow, oh);
ImageProducer ip = new MemoryImageSource(ow, oh, opix, 0, ow);
oImage = createImage(ip);
common.draw(g, iImage, oImage, iw, ih, 0, 7);
} else JOptionPane.showMessageDialog(null, "参数必须为正数!");
} else if (evt.getSource() == nearItem) {
setTitle("第4章 图像几何变换 最邻近插值算法 作者 孙燮华");
pix = common.grabber(iImage, iw, ih);
float p =
(Float.valueOf(JOptionPane.showInputDialog(null, "输入缩放参数(0.1-3.0)", "1.50")))
.floatValue();
int ow = (int) (p * iw); // 计算目标图宽高
int oh = (int) (p * ih);
opix = geom.nearNeighbor(pix, iw, ih, ow, oh, p);
ImageProducer ip = new MemoryImageSource(ow, oh, opix, 0, ow);
oImage = createImage(ip);
common.draw(g, oImage, "最邻近插值", p);
} else if (evt.getSource() == linrItem) {
setTitle("第4章 图像几何变换 双线性插值算法 作者 孙燮华");
pix = common.grabber(iImage, iw, ih);
float p =
(Float.valueOf(JOptionPane.showInputDialog(null, "输入缩放参数(0.1-3.0)", "1.50")))
.floatValue();
int ow = (int) (p * iw); // 计算目标图宽高
int oh = (int) (p * ih);
opix = geom.bilinear(pix, iw, ih, ow, oh, p);
ImageProducer ip = new MemoryImageSource(ow, oh, opix, 0, ow);
oImage = createImage(ip);
common.draw(g, oImage, "双线性插值", p);
} else if (evt.getSource() == cubicItem) {
setTitle("第4章 图像几何变换 三次卷积插值算法 作者 孙燮华");
pix = common.grabber(iImage, iw, ih);
float p =
(Float.valueOf(JOptionPane.showInputDialog(null, "输入缩放参数(1.1-3.0)", "1.50")))
.floatValue();
if (p < 1) {
JOptionPane.showMessageDialog(null, "参数p必须大于1!");
return;
}
int ow = (int) (p * iw); // 计算目标图宽高
int oh = (int) (p * ih);
opix = geom.scale(pix, iw, ih, ow, oh, p, p);
ImageProducer ip = new MemoryImageSource(ow, oh, opix, 0, ow);
oImage = createImage(ip);
common.draw(g, oImage, "三次卷积插值", p);
} else if (evt.getSource() == okButton) dialog.dispose();
else if (evt.getSource() == exitItem) System.exit(0);
}
private void readHeader() throws IOException {
if (gotHeader) {
iis.seek(128);
return;
}
metadata = new PCXMetadata();
manufacturer = iis.readByte(); // manufacturer
if (manufacturer != MANUFACTURER) throw new IllegalStateException("image is not a PCX file");
metadata.version = iis.readByte(); // version
encoding = iis.readByte(); // encoding
if (encoding != ENCODING)
throw new IllegalStateException("image is not a PCX file, invalid encoding " + encoding);
metadata.bitsPerPixel = iis.readByte();
metadata.xmin = iis.readShort();
metadata.ymin = iis.readShort();
xmax = iis.readShort();
ymax = iis.readShort();
metadata.hdpi = iis.readShort();
metadata.vdpi = iis.readShort();
iis.readFully(smallPalette);
iis.readByte(); // reserved
colorPlanes = iis.readByte();
bytesPerLine = iis.readShort();
paletteType = iis.readShort();
metadata.hsize = iis.readShort();
metadata.vsize = iis.readShort();
iis.skipBytes(54); // skip filler
width = xmax - metadata.xmin + 1;
height = ymax - metadata.ymin + 1;
if (colorPlanes == 1) {
if (paletteType == PALETTE_GRAYSCALE) {
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
int[] nBits = {8};
colorModel =
new ComponentColorModel(
cs, nBits, false, false, Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
sampleModel =
new ComponentSampleModel(DataBuffer.TYPE_BYTE, width, height, 1, width, new int[] {0});
} else {
if (metadata.bitsPerPixel == 8) {
// read palette from end of file, then reset back to image data
iis.mark();
if (iis.length() == -1) {
// read until eof, and work backwards
while (iis.read() != -1) ;
iis.seek(iis.getStreamPosition() - 256 * 3 - 1);
} else {
iis.seek(iis.length() - 256 * 3 - 1);
}
int palletteMagic = iis.read();
if (palletteMagic != 12)
processWarningOccurred(
"Expected palette magic number 12; instead read "
+ palletteMagic
+ " from this image.");
iis.readFully(largePalette);
iis.reset();
colorModel = new IndexColorModel(metadata.bitsPerPixel, 256, largePalette, 0, false);
sampleModel = colorModel.createCompatibleSampleModel(width, height);
} else {
int msize = metadata.bitsPerPixel == 1 ? 2 : 16;
colorModel = new IndexColorModel(metadata.bitsPerPixel, msize, smallPalette, 0, false);
sampleModel = colorModel.createCompatibleSampleModel(width, height);
}
}
} else {
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
int[] nBits = {8, 8, 8};
colorModel =
new ComponentColorModel(
cs, nBits, false, false, Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
sampleModel =
new ComponentSampleModel(
DataBuffer.TYPE_BYTE,
width,
height,
1,
width * colorPlanes,
new int[] {0, width, width * 2});
}
originalSampleModel = sampleModel;
originalColorModel = colorModel;
gotHeader = true;
}
@Override
public Color compute(double x, double y) {
return model.compute(
x * Math.cos(angle) - y * Math.sin(angle), x * Math.sin(angle) + y * Math.cos(angle));
}
public BufferedImage filter(BufferedImage src, BufferedImage dst) {
int width = src.getWidth();
int height = src.getHeight();
int type = src.getType();
WritableRaster srcRaster = src.getRaster();
originalSpace = new Rectangle(0, 0, width, height);
transformedSpace = new Rectangle(0, 0, width, height);
transformSpace(transformedSpace);
if (dst == null) {
ColorModel dstCM = src.getColorModel();
dst =
new BufferedImage(
dstCM,
dstCM.createCompatibleWritableRaster(transformedSpace.width, transformedSpace.height),
dstCM.isAlphaPremultiplied(),
null);
}
WritableRaster dstRaster = dst.getRaster();
int[] inPixels = getRGB(src, 0, 0, width, height, null);
if (interpolation == NEAREST_NEIGHBOUR)
return filterPixelsNN(dst, width, height, inPixels, transformedSpace);
int srcWidth = width;
int srcHeight = height;
int srcWidth1 = width - 1;
int srcHeight1 = height - 1;
int outWidth = transformedSpace.width;
int outHeight = transformedSpace.height;
int outX, outY;
int index = 0;
int[] outPixels = new int[outWidth];
outX = transformedSpace.x;
outY = transformedSpace.y;
float[] out = new float[2];
for (int y = 0; y < outHeight; y++) {
for (int x = 0; x < outWidth; x++) {
transformInverse(outX + x, outY + y, out);
int srcX = (int) Math.floor(out[0]);
int srcY = (int) Math.floor(out[1]);
float xWeight = out[0] - srcX;
float yWeight = out[1] - srcY;
int nw, ne, sw, se;
if (srcX >= 0 && srcX < srcWidth1 && srcY >= 0 && srcY < srcHeight1) {
// Easy case, all corners are in the image
int i = srcWidth * srcY + srcX;
nw = inPixels[i];
ne = inPixels[i + 1];
sw = inPixels[i + srcWidth];
se = inPixels[i + srcWidth + 1];
} else {
// Some of the corners are off the image
nw = getPixel(inPixels, srcX, srcY, srcWidth, srcHeight);
ne = getPixel(inPixels, srcX + 1, srcY, srcWidth, srcHeight);
sw = getPixel(inPixels, srcX, srcY + 1, srcWidth, srcHeight);
se = getPixel(inPixels, srcX + 1, srcY + 1, srcWidth, srcHeight);
}
outPixels[x] = ImageMath.bilinearInterpolate(xWeight, yWeight, nw, ne, sw, se);
}
setRGB(dst, 0, y, transformedSpace.width, 1, outPixels);
}
return dst;
}
public BufferedImage decompress(final QuickTime.ImageDesc pDescription, final InputStream pStream)
throws IOException {
byte[] data = new byte[pDescription.dataSize];
DataInputStream stream = new DataInputStream(pStream);
try {
stream.readFully(data, 0, pDescription.dataSize);
} finally {
stream.close();
}
DataBuffer buffer = new DataBufferByte(data, data.length);
WritableRaster raster;
// TODO: Depth parameter can be 1-32 (color) or 33-40 (gray scale)
switch (pDescription.depth) {
case 40: // 8 bit gray (untested)
raster =
Raster.createInterleavedRaster(
buffer,
pDescription.width,
pDescription.height,
pDescription.width,
1,
new int[] {0},
null);
break;
case 24: // 24 bit RGB
raster =
Raster.createInterleavedRaster(
buffer,
pDescription.width,
pDescription.height,
pDescription.width * 3,
3,
new int[] {0, 1, 2},
null);
break;
case 32: // 32 bit ARGB
// WORKAROUND: There is a bug in the way Java 2D interprets the band offsets in
// Raster.createInterleavedRaster (see below) before Java 6. So, instead of
// passing a correct offset array below, we swap channel 1 & 3 to make it ABGR...
for (int y = 0; y < pDescription.height; y++) {
for (int x = 0; x < pDescription.width; x++) {
int offset = 4 * y * pDescription.width + x * 4;
byte temp = data[offset + 1];
data[offset + 1] = data[offset + 3];
data[offset + 3] = temp;
}
}
raster =
Raster.createInterleavedRaster(
buffer,
pDescription.width,
pDescription.height,
pDescription.width * 4,
4,
new int[] {3, 2, 1, 0}, // B & R mixed up. {1, 2, 3, 0} is correct
null);
break;
default:
throw new IIOException("Unsupported RAW depth: " + pDescription.depth);
}
ColorModel cm =
new ComponentColorModel(
pDescription.depth <= 32
? ColorSpace.getInstance(ColorSpace.CS_sRGB)
: ColorSpace.getInstance(ColorSpace.CS_GRAY),
pDescription.depth == 32,
false,
pDescription.depth == 32 ? Transparency.TRANSLUCENT : Transparency.OPAQUE,
DataBuffer.TYPE_BYTE);
return new BufferedImage(cm, raster, cm.isAlphaPremultiplied(), null);
}
public int[] doContrast(int[] pix, int iw, int ih, double contrast)
{
ColorModel cm = ColorModel.getRGBdefault();
int r, g, b;
for(int i = 0; i < iw*ih; i++)
{
r = (int) (contrast>=0?cm.getRed(pix[i]) + (255-cm.getRed(pix[i]))*contrast:
cm.getRed(pix[i]) + cm.getRed(pix[i])*contrast);
g = (int) (contrast>=0?cm.getGreen(pix[i]) + (255-cm.getGreen(pix[i]))*contrast:
cm.getGreen(pix[i]) + cm.getGreen(pix[i])*contrast);
b = (int) (contrast>=0?cm.getBlue(pix[i]) + (255-cm.getBlue(pix[i]))*contrast:
cm.getBlue(pix[i]) + cm.getBlue(pix[i])*contrast);
pix[i] = 255 << 24|r << 16|g << 8|b;
}
System.out.println("contrast is: " + contrast);
return pix;
}
