MULTICHANNEL EDGE ENHANCEMENT IN COLOR IMAGE-PROCESSING

In this paper, a multichannel edge enhancing filter (MEEF) based on th e vector median is introduced for enhancing degraded edges in color im ages. An input multichannel signal is filtered with three subfilters, and the final output is determined by comparing the outputs of the sub filters and their vector median. Root signal and edge enhancement prop erties of the MEEF are examined in detail. In addition, we discuss lin e preservation and edge jitter resistance of the MEEF in noisy conditi ons. Finally, the MEEF is tested with: i) blurred edges caused by unfo cusing or fast movement of camera, ii) serrated edges caused by interl aced scan, iii) false color edges caused by channel dispersion. The re sults show that the MEEF outperforms channelwise edge enhancing filter ing in enhancing these degraded edges.