cvResize function with JavaCV

Question

Says I'm using the wrong types here. Both img and image are iplImages, what type should I be using and how do I use it? Thanks

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

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

Answer 1

this should work

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

and here a full example

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");
}

Answer 2

you should use the same number of the channels as in the source image

Answer 3

replace IPL_DEPTH_8U parameter with img.nChannels()