So as i understand, you maysearchthe IPP functions undersection compute vision, image edge detect, image segementation, or Image Moments or the routines from Image statistics to complete what you hope to do. for example callthe function ippiDistanceTransform_XX(),ippiTrueDistanceTransform_8u32f_C1R,ippiFastMarching_8u32f_C1R (usingfast marching method.) they calculates distance to the closest zero pixel for all non-zero pixels of source image, can be useda wide variety of subjects including skeleton finding and shape analysis.
As Ying mentioned, you can look into IPP Sobel filter functions. IPP sample code has Picnic application. This application demonstrates different image operation including edge detection (Sobel filter).