如何绘制j帧上图像的单个RGB分量

Question

我需要在Jframe上打印此程序的输出（即三个图像）...代码如下...我可以将其存储在“test “的NetBeans的文件夹，但只是不能显示它..

import javax.imageio.ImageIO; 
import java.io.File; 
import java.awt.image.BufferedImage; 

public class RGBSpliter { 
    static BufferedImage image; 
    static BufferedImage redImage, greenImage, blueImage; 
    static final int TYPE = BufferedImage.TYPE_INT_ARGB; 

    public static void main(String[] args) throws Exception { 
     image = ImageIO.read(new File("F:\\Images\\animated\\008.jpg")); 
     int w = image.getWidth(); 
     int h = image.getHeight(); 
     redImage = new BufferedImage(w, h, TYPE); 
     greenImage = new BufferedImage(w, h, TYPE); 
     blueImage = new BufferedImage(w, h, TYPE); 
     for (int y = 0; y < h; y++) 
     for (int x = 0; x < w; x++) { 
      int pixel = image.getRGB(x, y); 
      int alpha_mask = pixel & 0xff000000; 
      int red = (pixel >> 16) & 0xff; 
      int green = (pixel >> 8) & 0xff; 
      int blue = (pixel) & 0xff; 
      redImage.setRGB(x, y, alpha_mask | (red << 16)); 
      greenImage.setRGB(x, y, alpha_mask | (green << 8)); 
      blueImage.setRGB(x, y, alpha_mask | blue); 
     } 
     String format = "png"; 
     ImageIO.write(redImage, format, new File("image_red.png")); 
     ImageIO.write(greenImage, format, new File("image_green.png")); 
     ImageIO.write(blueImage, format, new File("image_blue.png")); 
    } 
} 

Answer 1

你的代码工作对我来说：

import javax.imageio.ImageIO; 
import javax.swing.ImageIcon; 
import javax.swing.JOptionPane; 
import java.net.URL; 
import java.awt.Image; 
import java.awt.image.BufferedImage; 

public class RGBSpliter { 
    static BufferedImage image; 
    static BufferedImage redImage, greenImage, blueImage; 
    static final int TYPE = BufferedImage.TYPE_INT_ARGB; 

    public static void main(String[] args) throws Exception { 
     String imgPath = 
      "https://duke.kenai.com/china/.Midsize/DragonGoldenMedium.jpg.png"; 
     URL imgUrl = new URL(imgPath); 
     image = ImageIO.read(imgUrl); 


     int w = image.getWidth(); 
     int h = image.getHeight(); 
     redImage = new BufferedImage(w, h, TYPE); 
     greenImage = new BufferedImage(w, h, TYPE); 
     blueImage = new BufferedImage(w, h, TYPE); 
     for (int y = 0; y < h; y++) { 
     for (int x = 0; x < w; x++) { 
      int pixel = image.getRGB(x, y); 
      int alpha_mask = pixel & 0xff000000; 
      int red = (pixel >> 16) & 0xff; 
      int green = (pixel >> 8) & 0xff; 
      int blue = (pixel) & 0xff; 
      redImage.setRGB(x, y, alpha_mask | (red << 16)); 
      greenImage.setRGB(x, y, alpha_mask | (green << 8)); 
      blueImage.setRGB(x, y, alpha_mask | blue); 
     } 
     } 
     // String format = "png"; 

     Image[] images = {image, redImage, greenImage, blueImage}; 
     for (Image localImage : images) { 
     ImageIcon icon = new ImageIcon(localImage); 
     JOptionPane.showMessageDialog(null, icon); 
     } 
    } 
}