A region identifier identifies a region within a diagnostic image corresponding to one of plural predetermined clinical findings according to a first feature value from a feature value detector. A level detector performs level detection of the region at one of plural levels associated with the clinical findings for evaluation of the clinical findings according to a second feature value from a feature value detector. A color mapped image generator generates a color mapped image by color mapping of the diagnostic image with a display color associated with respectively the clinical findings and chromaticity of the display color associated with the levels. A monitor display panel is caused to display the color mapped image by control of a display control unit. Preferably, the diagnostic image is an image generated by an endoscope. The color mapped image generator is included in a processing apparatus.
