On CFI and CFI-based filters

We have proposed that the co-occurrence frequency image based on the co-occurrence frequency histogram of the gray value of an image has a new potential to introduce a new scheme for image feature extraction. This paper proposes a couple of new enhancement filters to achieve sharpening and smoothing of images. These filters are very similar to but quite different from those which have been used so far. Thus, we could show a possibility for introducing a new paradigm for basic image enhancement filters. We also introduce the application for wrinkle extraction from facial image.