如何检索tiff图像中的像素（加载JAI）？

Question

我正在使用一个类（DisplayContainer）来保存应该向用户显示的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如下所示：

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

}

我想知道的是如何获得点击像素的RGB值？

Answer 1

如果source是BufferedImage，您可以使用getRGB()，如图here所示。