I tested the FaceDetection sample of the IPP and it works quiet good.
Now I wrote a converter of the opencv haar feature cascade and an extendet detection code for using the tilted features of opencv.
After testing a lot of parameters, ic got my code running and it detect some faces.
The problem is, that it detect not the right faces. I noticed that the detected faces are on regions in the images, where no edges and a very high illumination is present.
I thought I used all the parameter combinations that are used in the opencv code, but it seems to be not the same, because the cascade I use gives with the performance tool of the opencv code good results.
Is there somebody who tried to use the opencv cascade and can give me some hints what the problem good be.