Java分割拼接图片

分割图片

 privatestaticvoidsplitImage()throwsIOException{

 StringoriginalImg="C:\\img\\split\\a380_1280x1024.jpg";

 //读入大图
 Filefile=newFile(originalImg);
 FileInputStreamfis=newFileInputStream(file);
 BufferedImageimage=ImageIO.read(fis);

 //分割成4*4(16)个小图
 introws=4;
 intcols=4;
 intchunks=rows*cols;

 //计算每个小图的宽度和高度
 intchunkWidth=image.getWidth()/cols;
 intchunkHeight=image.getHeight()/rows;

 intcount=0;
 BufferedImageimgs[]=newBufferedImage[chunks];
 for(intx=0;x<rows;x++){
 for(inty=0;y<cols;y++){
 //设置小图的大小和类型
 imgs[count]=newBufferedImage(chunkWidth,chunkHeight,image.getType());

 //写入图像内容
 Graphics2Dgr=imgs[count++].createGraphics();
 gr.drawImage(image,0,0,
 chunkWidth,chunkHeight,
 chunkWidth*y,chunkHeight*x,
 chunkWidth*y+chunkWidth,
 chunkHeight*x+chunkHeight,null);
 gr.dispose();
 }
 }

 //输出小图
 for(inti=0;i<imgs.length;i++){
 ImageIO.write(imgs[i],"jpg",newFile("C:\\img\\split\\img"+i+".jpg"));
 }

 System.out.println("完成分割！");
 }

拼接图片

 privatestaticvoidmergeImage()throwsIOException{

 introws=2;
 intcols=2;
 intchunks=rows*cols;

 intchunkWidth,chunkHeight;
 inttype;

 //读入小图
 File[]imgFiles=newFile[chunks];
 for(inti=0;i<chunks;i++){
 imgFiles[i]=newFile("C:\\img\\merge\\img"+i+".jpg");
 }

 //创建BufferedImage
 BufferedImage[]buffImages=newBufferedImage[chunks];
 for(inti=0;i<chunks;i++){
 buffImages[i]=ImageIO.read(imgFiles[i]);
 }
 type=buffImages[0].getType();
 chunkWidth=buffImages[0].getWidth();
 chunkHeight=buffImages[0].getHeight();

 //设置拼接后图的大小和类型
 BufferedImagefinalImg=newBufferedImage(chunkWidth*cols,chunkHeight*rows,type);

 //写入图像内容
 intnum=0;
 for(inti=0;i<rows;i++){
 for(intj=0;j<cols;j++){
 finalImg.createGraphics().drawImage(buffImages[num],chunkWidth*j,chunkHeight*i,null);
 num++;
 }
 }

 //输出拼接后的图像
 ImageIO.write(finalImg,"jpeg",newFile("C:\\img\\merge\\finalImg.jpg"));

 System.out.println("完成拼接！");
 }