topic Re: cvFilter2D function fails when using IPP in Intel® Integrated Performance Primitives

cvFilter2D function fails when using IPP

mprobst — Thu, 09 Mar 2006 01:09:12 GMT

Hi all,

I am using openCV's cvFilter2D function with different filter kernels. When I have IPP installed the resulting images get covered with white/black (depending on the background) stripes (~6 with 8-bit and >10 with 32-bit images). As soon as I remove IPP the function works just fine. Does anybody have an idea what that could be. Could this be a bug in IPP?

Thanks a lot,

Martin.

Re: cvFilter2D function fails when using IPP

Vladimir_Dudnik — Thu, 16 Mar 2006 02:31:45 GMT

Hi Martin,

there is answer from our expert:

As the stripe size depends on the datatype, it looks like a bug in OpenCV wrapping code. The suggestion is to try the latest OpenCV version from CVS. And/or provide the parameters used (filter size, anchor point coordinates, filter coefficients, image size and type (bit-depth and number of channels)).

Regards,
Vladimir

Re: cvFilter2D function fails when using IPP

mprobst — Thu, 16 Mar 2006 14:55:08 GMT

Hi Vladimir,

thanks very much for your reply. I am already using the newest openCV version (0.9.7 under Linux). OpenCV's cvFilter2D function prototype looks like this:

void cvFilter2D( const CvArr* src, CvArr* dst,
const CvMat* kernel,
CvPoint anchor=cvPoint(-1,-1)),

so the only parameters I can play with are the anchor point. src and dst are images with the same size, number of channels and bit-depth and the kernel I am using is either a 3x3 or 5x5 matrix. I just don't see why it works fine without IPP. Please let me know if you have more ideas. I will try to go through openCV's wrapping code upon time.

Cheers,

Martin.