A raw image and a processed image having several color assigned to IHb values, which correspond to hematic information, can be produced from a signal produced by a CCD incorporated in an electronic endoscope. When display of a quasi color image is enabled, the processed image is displayed in the form of a still image. When a release switch is handled, the quasi color processed image is photographed using a monitor photographing apparatus and thus recorded. Thereafter, a still image of a raw image depicting the same scene as the processed image can be displayed.
