A chromaticity diagram is divided into a plurality of sections by a
primary color line and a complementary color line of a color that does
not cause hue turn, then it is decided to which section a color signal
being output from an imaging device belongs, and then a color correcting
operation is performed for the color signal every section. Accordingly,
it is not needed to detect the flesh color itself when the hue turn of
the flesh color is corrected by the color correcting operation. Any flesh
color can be decided easily according to whether or not the color signal
being output from the imaging device has entered into the section
including the flesh color. Therefore, the appropriate color correcting
operation can be applied to the flesh color.