这应该工作
IplImage resizeImage = IplImage.create(120, 120, origImg.depth(), origImg.nChannels());
这里有一个完整的例子
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");
}