java图像分割方法集合

1、import java.awt.*;import javax.swing.*;class ImageTest extends JFrame public ImageTest() setSize(300,300); setVisible(true); public Image splitImage(String file, int rows, int cols) System.out.println("Test");Image t=new ImageIcon(file).getImage(); Image result = new Imagerows * cols; int

2、w = t.getWidth(this)/cols; int h = t.getHeight(this)/rows; try for(int i = 0;i<result.length;i+) resulti = this.createImage(w,h); Graphics g = resulti.getGraphics(); g.translate(-i%cols)*w,(-i/cols)*h); g.drawImage(t,0,0,this); System.out.println("Test"); catch(Exception e) return resul

3、t; class Test extends JFrame public Test() setSize(300,300); setVisible(true); public void paint(Graphics g) ImageTest tt = new ImageTest(); Image image = tt.splitImage("1.gif",5,5); g.drawImage(image0,0,0,this); public static void main(String args) new Test(); 将一个大图像分割成几个小图像的代码/分割图像的方法。 i

4、mport javax.swing.*; import java.awt.*; import java.awt.image.*;import .URL; import java.io.File;import java.util.Hashtable; public class ChenWin504 extends JApplet Image im; MediaTracker me; Image imag; public static Hashtable cache; public void init() URL ur=ChenWin504.class.getResource("imag

5、es/ima"); imag=new Image10; System.out.println(ur); im=getToolkit().getImage("images/ima/jumptojavastrip.png"); me=new MediaTracker(this); me.addImage(im,0); try me.waitForID(0); catch(Exception e) DemoImages(); for(int i=0;i<10;i+) imagi=(Image)cache.get("jumptojavastrip-&quo

6、t;+i+".png"); if(imagi=null) System.out.println("null"); public void paint(Graphics g) int x=5; int y=100; g.drawImage(im,5,0,null); for(int i=0;i<10;i+) g.drawImage(imagi,x,y,null); x+=100; if(x>300) x=5;y+=100; public void DemoImages() URL url = ChenWin504.class.getResour

7、ce("images/ima"); File dir = new File(url.getFile(); if (dir != null && dir.isDirectory() String list = dir.list(); System.out.println(list.length); cache = new Hashtable(list.length); for (int i = 0; i < list.length; i+) cache.put(listi, createImage(listi, this); if (cache.cont

8、ainsKey("jumptojavastrip.png") Image img = (Image) cache.get("jumptojavastrip.png"); for (int i=0, x=0; i < 10; i+, x+=80) String s = "jumptojavastrip-" + String.valueOf(i) + ".png" cache.put(s, getCroppedImage(img, x, 0, 80, 80, this); public static Image

9、createImage(String fileName, Component cmp) URL url = ChenWin504.class.getResource("images/ima/" + fileName); Image img = cmp.getToolkit().createImage(url); trackImage(img, cmp); return img; /分割图像的方法。 public static Image getCroppedImage(Image img, int x, int y, int w, int h, Component cmp)

10、 ImageProducer imgP = img.getSource(); CropImageFilter cif = new CropImageFilter(x, y, w, h); ImageProducer ip = new FilteredImageSource(imgP, cif); Image croppedimage = cmp.getToolkit().createImage(ip); trackImage(croppedimage, cmp); return croppedimage; private static void trackImage(Image img, Co

11、mponent cmp) MediaTracker tracker = new MediaTracker(cmp); tracker.addImage(img, 0); try tracker.waitForID(0); catch (Exception ex) ex.printStackTrace(); 效果图：java 图片切割,缩放,转换类型等等 import java.io.*;import java.awt.*;import java.awt.image.*;import java.awt.Graphics;import java.awt.color.ColorSpace;impor

12、t javax.imageio.ImageIO;public class ImageCut /* * 缩放图像 * param srcImageFile源图像文件地址 * param result缩放后的图像地址 * param scale缩放比例 * param flag缩放选择:true 放大; false 缩小; */ public static void scale(String srcImageFile, String result, int scale, boolean flag) try BufferedImage src = ImageIO.read(new File(srcI

13、mageFile); / 读入文件 int width = src.getWidth(); / 得到源图宽 int height = src.getHeight(); / 得到源图长 if (flag) / 放大 width = width * scale; height = height * scale; else / 缩小 width = width / scale; height = height / scale; Image image = src.getScaledInstance(width, height, Image.SCALE_DEFAULT); BufferedImage

14、tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics g = tag.getGraphics(); g.drawImage(image, 0, 0, null); / 绘制缩小后的图 g.dispose(); ImageIO.write(tag, "JPEG", new File(result);/ 输出到文件流 catch (IOException e) e.printStackTrace(); /* * 图像切割 * param srcImageFile源图像地址 * p

15、aram descDir切片目标文件夹 * param destWidth目标切片宽度 * param destHeight目标切片高度 */ public static void cut(String srcImageFile, String descDir, int destWidth, int destHeight) try Image img; ImageFilter cropFilter;/ 读取源图像 BufferedImage bi = ImageIO.read(new File(srcImageFile); int srcWidth = bi.getHeight(); / 源图

16、宽度 int srcHeight = bi.getWidth(); / 源图高度 if (srcWidth > destWidth && srcHeight > destHeight) Image image = bi.getScaledInstance(srcWidth, srcHeight, Image.SCALE_DEFAULT); destWidth = 200; / 切片宽度 destHeight = 150; / 切片高度 int cols = 0; / 切片横向数量 int rows = 0; / 切片纵向数量 / 计算切片的横向和纵向数量 if (s

17、rcWidth % destWidth = 0) cols = srcWidth / destWidth; else cols = (int) Math.floor(srcWidth / destWidth) + 1; if (srcHeight % destHeight = 0) rows = srcHeight / destHeight; else rows = (int) Math.floor(srcHeight / destHeight) + 1; / 循环建立切片 / 改进的想法:是否可用多线程加快切割速度 for (int i = 0; i < rows; i+) for (

18、int j = 0; j < cols; j+) / 四个参数分别为图像起点坐标和宽高 / 即: CropImageFilter(int x,int y,int width,int height) cropFilter = new CropImageFilter(j * 200, i * 150, destWidth, destHeight); img = Toolkit.getDefaultToolkit().createImage( new FilteredImageSource(image.getSource(), cropFilter); BufferedImage tag =

19、new BufferedImage(destWidth, destHeight, BufferedImage.TYPE_INT_RGB); Graphics g = tag.getGraphics(); g.drawImage(img, 0, 0, null); / 绘制缩小后的图 g.dispose(); / 输出为文件 ImageIO.write(tag, "JPEG", new File(descDir + "pre_map_" + i + "_" + j + ".jpg"); catch (Exceptio

20、n e) e.printStackTrace(); / 图像类型转换GIF->JPG GIF->PNG PNG->JPG PNG->GIF(X) public static void convert(String source, String result) try File f = new File(source); f.canRead(); f.canWrite(); BufferedImage src = ImageIO.read(f); ImageIO.write(src, "JPG", new File(result); catch (Ex

21、ception e) / TODO Auto-generated catch block e.printStackTrace(); / 彩色转为黑白 public static void gray(String source, String result) try BufferedImage src = ImageIO.read(new File(source); ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY); ColorConvertOp op = new ColorConvertOp(cs, null); src =

22、op.filter(src, null); ImageIO.write(src, "JPEG", new File(result); catch (IOException e) e.printStackTrace(); public static void main(String args) /cut("e:/1.jpg", "e:/t/", 200, 150); 求助大图像分割并输出分割后的小图，程序有问题，求教程序要求就是，把一幅1620x1620的大图片分割成20x20个 81x81的小图片，并把小图片以PNG格式输出，源码如下

23、，需输入三个参数：Inputimagefile XCell YCell 2.jpg 20 20源码不完全，现在暂时先计划分割大图第一个横轴的长条，因为运行到ImageIO.write(CellImage, "png", new File("2"+spliter+i+spliter+"0"+outFileName);这行时就有问题。请求教哪里出了问题，急/package imageslicer;import java.awt.Container;import java.awt.Dimension;import java.awt.Grap

24、hics;import java.awt.Graphics2D;import java.awt.Image;import java.awt.MediaTracker;import java.awt.Rectangle;import java.awt.RenderingHints;import java.awt.Robot;import java.awt.Toolkit;import java.awt.image.BufferedImage;import java.awt.image.CropImageFilter;import java.awt.image.FilteredImageSourc

25、e;import java.awt.image.ImageFilter;import java.awt.image.ImageProducer;import java.awt.image.RenderedImage;import java.io.File;import javax.imageio.ImageIO;import javax.imageio.stream.ImageInputStream;import javax.swing.ImageIcon;public class test private static BufferedImage CellImage; public stat

26、ic void main(String args) throws Exception / make sure we have exactly two arguments, / a waiting period and a file name if (args.length != 3) System.err.println("Usage: java test " + "Inputimagefile XCell YCell"); System.exit(1); String inputFileName = args0; Toolkit toolkit = T

27、oolkit.getDefaultToolkit(); Image image = toolkit.getImage(inputFileName); MediaTracker tracker = new MediaTracker(new Container(); tracker.addImage(image, 1); try tracker.waitForID(1); catch(InterruptedException e) String outFileName = ".png" String spliter ="-" int XCell = Inte

28、ger.parseInt(args1); int YCell = Integer.parseInt(args2); /ImageProducer producer = image.getSource(); /BufferedImage CellImage = new BufferedImage(81,81, BufferedImage.TYPE_INT_RGB); Image Cell = new Image XCell ; for (int i = 0; i <= XCell-1; i+) ImageFilter filter = new CropImageFilter(0+i * 8

29、1, 0, 81, 81); ImageProducer producer=new FilteredImageSource(image.getSource(),filter); /Celli = createImage(new FilteredImageSource(producer, filter); Celli = createImage(FilteredImageSource) producer); CellImage = (BufferedImage) Celli; tracker.addImage(Celli, 2); /CellImage = ImageIO.read(ImageI

30、nputStream) Celli); BufferedImage CellImage = new BufferedImage(81,81, BufferedImage.TYPE_INT_RGB); CellImage = (BufferedImage) Celli; ImageIO.write(CellImage, "png", new File("2"+spliter+i+spliter+"0"+outFileName); try tracker.waitForID(2); catch(InterruptedException e

31、) /BufferedImage image = robot.createScreenCapture(screenRect); public void paint(Graphics g) Graphics2D g2 = (Graphics2D) g; private static Image createImage(FilteredImageSource source) / TODO Auto-generated method stub return null; 问题解决了，原因如下切割图片并输出时，不能用下面的方法,下面的方法是适合在屏幕上显示或者copy到内存里供其它使用 ImageFil

32、ter filter = new CropImageFilter(0+i * 81, 0, 81, 81); ImageProducer producer=new FilteredImageSource(image.getSource(),filter); /Celli = createImage(new FilteredImageSource(producer, filter); Celli = createImage(FilteredImageSource) producer);而要用getSubimage 方法，这才是适合成图输出的方法BufferedImage CellImage =

33、new BufferedImage(newFile(.);CellImage.getSubimage(0+i * 81, 0, 81, 81);用Java简单实现文件分割与合并,主要应用IO的RandomAccessFile(听说断点续传是用它实现)import java.io.*;class Fen String fileName; int size; Fen(String fileName,String size) this.fileName = fileName; this.size = Integer.parseInt(size)*1024; public void cut()thro

34、ws Exception int maxx = 0; File inFile = new File(fileName); int fileLength = (int)inFile.length(); /取得文件的大小int value; /取得要分割的个数 RandomAccessFile inn = new RandomAccessFile(inFile,"r");/打开要分割的文件 value = fileLength/size; int i=0; int j=0; /根据要分割的数目输出文件 for (;j File outFile = new File(inFile

35、.getName()+j+"zzii"); RandomAccessFile outt= new RandomAccessFile(outFile,"rw"); maxx+=size; for (;i outt.write(inn.read(); outt.close(); File outFile = new File(inFile.getName()+j+"zzii");RandomAccessFile outt= new RandomAccessFile(outFile,"rw"); for(;i >)outt.write(inn.read()