topic Wiener filter in Intel® Integrated Performance Primitives

Wiener filter

szakatszozo — Fri, 30 Jul 2004 03:57:35 GMT

Hi everybody,

I would like to restore a blurred image by constant object motion, useing the Wiener filter.
I can calculate the motion of the object in pixels in the captured image and also the angle of the motion. Is it possible to use the ippiFilterWiener to remove the blurr or that is only made for noise reduction?
What other possibilities I have with IPP functions?

Thank you in advance for the help,
zozo'

Re: Wiener filter

Vladimir_Dudnik — Mon, 02 Aug 2004 16:31:07 GMT

Hi,

Yes, Wiener is for denoise operation. Unsharp filtering can help

/// another way, shorter. just one operation with unsharp mask

Ipp32f kernel[] = { -0.1667f, -0.6667f, -0.1667f, -0.6667f, 4.3333f, -0.6667f, -0.1667f, -0.6667f, -0.1667f };

IppiSize kernelSize = {3,3};
IppiPoint kernelAnchor = {1,1};

ippiFilter32f_8u_C1R( src+srcStep+1, srcStep, dst+dstStep+1, dstStep, dstSize, kernel, kernelSize,kernelAnchor);

Regards,
Vladimir

Re: Wiener filter

szakatszozo — Tue, 03 Aug 2004 01:03:23 GMT

ok, i will try this, but i would need to construct the kernel in way to use the info about the motion bluri know apriori: the number of pixels it moves and the angle;

in my case the number of pixels is the important one, the movement itself is always a vertical one...

could you help me in this?

thank you,

zozo'