Histogram Equalization - wrong format after cvCreateImage? about javacv HOT 9 CLOSED

Did you try cvEqualizeHist( img, out ) instead?

Yes, but even wors; it compiles, but it crashes on Runtime..
How about the Grayscale conversion problem?

I made some changes to that recently to fix issue #24. Can you try with this 
test package instead and see what happens? thanks
    http://www.ok.ctrl.titech.ac.jp/~saudet/javacv.jar

Unfortunately it's still the same..

If you are trying to convert a color image to a gray image, you should used the 
cvCvtColor() function, as exemplified in the README.txt file:
            // Let's try to detect some faces! but we need a grayscale image...
            cvCvtColor(grabbedImage, grayImage, CV_BGR2GRAY);
Does the cvCvtColor() function work or not?

That works perfect for grayscale!

However, we still have the problem with histogram equalization. In particular, 
I have found that the problem might be with the cvCreateImage part: I created a 
function to test just cvCreateImage, and in fact it does not work:
public BufferedImage testcvCreateImage(BufferedImage animg)
{
    IplImage img = IplImage.createFrom(animg);

        IplImage testimg = cvCreateImage(cvSize(img.width, img.height), IPL_DEPTH_8U, 1);       

        BufferedImage testBufferedimg = testimg.getBufferedImage();

        return testBufferedimg; //NOT DISPLAYABLE       
}

This might be causing the histogram equalization to fail? Or it may need to be 
treated as a new, separate issue?

What do you mean "NOT DISPLAYABLE"? What happens? testimg is an initialized 
image, it's not going to contain anything interesting..

True, I was doing it the wrong way. For future readers looking for a sample 
code in javacv for histogram equalization, this sample function code works just 
fine (thanks Samuel, you can now close this issue):
public BufferedImage Equalize(BufferedImage bufferedimg)
    {
        IplImage iploriginal = IplImage.createFrom(bufferedimg);

        IplImage srcimg = IplImage.create(iploriginal.width, iploriginal.height, IPL_DEPTH_8U, 1);
        IplImage destimg = IplImage.create(iploriginal.width, iploriginal.height, IPL_DEPTH_8U, 1);

        cvCvtColor(iploriginal, srcimg, CV_BGR2GRAY);

    cvEqualizeHist( srcimg, destimg );

        BufferedImage eqimg = destimg.getBufferedImage();

        return eqimg;
    }

Good!