Previously described Complex 2D Matched Filter (CMF) is an angle invariant line-like object detection filter. CMF provides additional information about angular orientation of extracted obejcts, which simplifies the segmentation procedure. Although CMF was successfully used for palm vein extraction from images CMF produces unwanted halo artifacts around the extracted objects (in our case – veins). Therefore, we have introduced an improved CMF approach that gets rid of the unwanted artifacts. This method is called Non Halo – Complex 2D Matched Filter (NH-CMF). Below is an example of the palm image filtered with CMF and NH-CMF. For further information please see the paper on NH-CMF in publications page.

Palm image filtered with CMF

Palm image filtered with NH-CMF