It provides: a kind of image processing equipment, color change mucous membrane that can be emphasized etc.,Atrophy irritability of stomach occurs during that due to atrophic gastritis With for operating endoscopic system. B picture signals and G picture signals are calculated between one first signal ratio (log (B/G)), and the picture signal of the picture signal of G and R is calculated between second signal ratio (log (G/R)). A kind of difference between processing execute first and second signals of amplification than between first area and the first and second signals than in second area so the color difference mucous membrane between highlighting is normal and abnormal area (atrophy mucosal areas and deep vessels region). Column color emphasizes that image is shown on a monitor.