切分和组合图片(一)

切分和组合图片

切割图片

1. load 要切分的图片

2. 确定要切分成多少块

3. 计算小图片的高度和宽度

4. 切分图片

5. 保存图片

要切分图片:



  File file = new File("btg.jpg"); // 项目目录下有名为btg.jpg的图片  
        FileInputStream fis = new FileInputStream(file);  
        BufferedImage image = ImageIO.read(fis); //把文件读到图片缓冲流中
  
        int rows = 4; //定义图片要切分成多少块  
        int cols = 4;  
        int chunks = rows * cols;  
  
        int chunkWidth = image.getWidth() / cols; // 计算每一块小图片的高度和宽度 
        int chunkHeight = image.getHeight() / rows;  
        int count = 0;  
        BufferedImage imgs[] = new BufferedImage[chunks];  
        for (int x = 0; x < rows; x++) {  
            for (int y = 0; y < cols; y++) {  
                //初始化BufferedImage 
                imgs[count] = new BufferedImage(chunkWidth, chunkHeight, image.getType());  
  
                //画出每一小块图片
                Graphics2D gr = imgs[count++].createGraphics();  
                gr.drawImage(image, 0, 0, chunkWidth, chunkHeight, chunkWidth * y, chunkHeight * x, chunkWidth * y + chunkWidth, chunkHeight * x + chunkHeight, null);  
                gr.dispose();  
            }  
        }  
        System.out.println("切分完成");  
  
        //保存小图片到文件中
        for (int i = 0; i < imgs.length; i++) {  
            ImageIO.write(imgs[i], "jpg", new File("img" + i + ".jpg"));  
        }  
        System.out.println("小图片创建完成");  

切分完成:




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