public static boolean compressPic(String srcFilePath, String descFilePath) {
File file = null;
BufferedImage src = null;
FileOutputStream out = null;
ImageWriter imgWrier;
ImageWriteParam imgWriteParams;
// 指定写图片的方式为 jpg
imgWrier = ImageIO.getImageWritersByFormatName("jpg").next();
imgWriteParams = new javax.imageio.plugins.jpeg.JPEGImageWriteParam(null);
// 要使用压缩，必须指定压缩方式为MODE_EXPLICIT
imgWriteParams.setCompressionMode(imgWriteParams.MODE_EXPLICIT);
// 这里指定压缩的程度，参数qality是取值0~1范围内，
imgWriteParams.setCompressionQuality((float) 0.1);
imgWriteParams.setProgressiveMode(imgWriteParams.MODE_DISABLED);
ColorModel colorModel = ColorModel.getRGBdefault();
// 指定压缩时使用的色彩模式
imgWriteParams.setDestinationType(
new javax.imageio.ImageTypeSpecifier(
colorModel, colorModel.createCompatibleSampleModel(16, 16)));
try {
if (StringUtils.isBlank(srcFilePath)) {
return false;
} else {
file = new File(srcFilePath);
src = ImageIO.read(file);
out = new FileOutputStream(descFilePath);
imgWrier.reset();
// 必须先指定 out值，才能调用write方法, ImageOutputStream可以通过任何 OutputStream构造
imgWrier.setOutput(ImageIO.createImageOutputStream(out));
// 调用write方法，就可以向输入流写图片
imgWrier.write(null, new IIOImage(src, null, null), imgWriteParams);
out.flush();
out.close();
}
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
/**
* 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 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);
}
