DISPLAY METHOD OF AREA EXTRACTION RESULTS, AND IMAGE PROCESSING DEVICE

A composite image is generated which synthesizes an extraction result image in a target image, and this composite image is displayed on a display device. When generating the extraction result image, all colors, or representative colors, are extracted from a pixel group within a boundary periphery area that includes the boundary between the estimated foreground area and the estimated background area and spans both the estimated foreground area and the estimated background area, and the colors of the extraction result image are determined so as to be as different as possible from the extracted colors.