IMAGE ENHANCEMENT PROCESSING SYSTEM AND ELECTRONIC ENDOSCOPE SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an image enhancement processing system that obtains a motion sharpening effect almost close to the perception of human and prevents the occurrence of processing error.SOLUTION: The latest frame image fof multiple images photographed in time series to form a moving image is made a processing reference image. As a past frame, average calculation areas A, A, Aare expanded, and spatial average images fs_av, fs_av, fs_avof the frame images f, f, fare calculated. A time average image ft_av is generated from the average of the spatial average images fs_av, fs_av, fs_av. A difference image fde is generated from a difference between the processing reference image fand the time average image ft_av. An enhanced image f' to the processing reference image fis obtained by adding α times of the difference image fde to the processing reference image f.