如何检索tiff图像中的像素（使用JAI加载）？

Question

我使用一个类（DisplayContainer）持有应显示给用户的RenderedOp图像：

RenderedOp image1 = JAI.create("tiff", params); 
DisplayContainer d = new DisplayContainer(image1); 
JScrollPane jsp = new JScrollPane(d); 

// Create a frame to contain the panel. 
Frame window = new Frame(); 
window.add(jsp); 
window.pack(); 
window.setVisible(true); 

类DisplayContainer看起来是这样的：

import java.awt.event.MouseEvent; 
import java.awt.geom.AffineTransform; 

import javax.media.jai.RenderedOp; 

import com.sun.media.jai.widget.DisplayJAI; 

public class DisplayContainer extends DisplayJAI { 

    private static final long serialVersionUID = 1L; 
    private RenderedOp img; 

    // Affine tranform 
    private final float ratio = 1f; 
    private AffineTransform scaleForm = AffineTransform.getScaleInstance(ratio, ratio); 

    public DisplayContainer(RenderedOp img) { 
     super(img); 
     this.img = img; 
     addMouseListener(this); 
    } 

    public void mouseClicked(MouseEvent e) { 
     System.out.println("Mouseclick at: (" + e.getX() + ", " + e.getY() + ")"); 
     // How to retrieve the RGB-value of the pixel where the click took 
     // place? 
    } 

    // OMISSIONS 

} 

我想要知道点击像素的RGB值是如何获得的？

Answer 1

如果source是BufferedImage，则可以使用getRGB()，如here所示。