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;
}
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 static void main(String args[]) {
ColorModel cm =
new ColorModel(32) {
public int getAlpha(int pixel) {
return 255;
}
public int getBlue(int pixel) {
return 255;
}
public int getGreen(int pixel) {
return 255;
}
public int getRed(int pixel) {
return 255;
}
};
cm.hasAlpha();
cm.isAlphaPremultiplied();
cm.getTransferType();
cm.getPixelSize();
cm.getComponentSize();
cm.getComponentSize();
cm.getTransparency();
cm.getNumComponents();
cm.getNumColorComponents();
cm.getRed(20);
cm.getGreen(20);
cm.getBlue(20);
cm.getAlpha(20);
cm.getRGB(20);
cm.isAlphaPremultiplied();
cm.isAlphaPremultiplied();
cm = ColorModel.getRGBdefault();
}
// ///////////////////////////////////////////////////////////////
// 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;
}
}