Question

I’m trying to aplicate an image filter with cvfilter2d

    cvmSet(kernel,0,0,5);
    cvmSet(kernel,0,1,5);
    cvmSet(kernel,0,2,5);   
    cvmSet(kernel,1,0,-3);
    cvmSet(kernel,1,1,0);
    cvmSet(kernel,1,2,-3);
    cvmSet(kernel,2,0,-3);
    cvmSet(kernel,2,1,-3);
    cvmSet(kernel,2,2,-3);

and then I aplicate this

cvFilter2D(imgMedia,imgRestitucion , kernel, cvPoint(-1,-1) );

but my result is a black image…what can I do? there’s some alternative?

Thanks in advance.

Answer 1

Finally I’ve found the solution about this.

All you have to do is initialize the kernel with a cvRealScalar number.

for(int y=0;y<9;y++) {
    for(int x=0; x<9; x++) {
        cvSet2D(kernel,x,y,cvRealScalar(-0.00132704 ));
    }
}

Then you can applicate the image filter to the ker and when you use cvFilter2D you won’t get black image.