带JavaCV的cvResize函数

说我用错了。img和image都是iplImages，我应该使用哪种类型以及如何使用它？谢谢

                    IplImage image = IplImage.create(120, 120, IPL_DEPTH_8U, 4);
                    //resize the image
                     cvResize(img,image);

                    cvSaveImage("4-rjb" + capture + ".pgm", img);

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您应该使用与源图像中相同数量的通道

将IPL_DEPTH_8U参数替换为img.nChannels（）

这应该有效

                    IplImage image = IplImage.create(120, 120, IPL_DEPTH_8U, 4);
                    //resize the image
                     cvResize(img,image);

                    cvSaveImage("4-rjb" + capture + ".pgm", img);

IplImage resizeImage = IplImage.create(120, 120, origImg.depth(), origImg.nChannels());

这里有一个完整的例子

                    IplImage image = IplImage.create(120, 120, IPL_DEPTH_8U, 4);
                    //resize the image
                     cvResize(img,image);

                    cvSaveImage("4-rjb" + capture + ".pgm", img);

OpenCVFrameGrabber frameGrabber = new OpenCVFrameGrabber(video_in);
try {
    frameGrabber.start();
    IplImage origImg = frameGrabber.grab();
    IplImage resizedImage = IplImage.create(IMG_WIDTH, IMG_HEIGHT, origImg.depth(), origImg.nChannels());

    //cvSmooth(origImg, origImg);
    cvResize(origImg, resizedImage);
    cvSaveImage(image_out.getAbsolutePath(),resizedImage);
    cvReleaseImage(resizedImage);

} catch (OpenCVFrameGrabber.Exception e) {
    e.printStackTrace();
    throw new NullPointerException("fileExtension");
}