Provided is an image processing system including: a specific wavelength image obtaining section that obtains a specific wavelength image being an image of light from an object existing inside a substance, the light belonging to a specific wavelength region; a depth calculator that calculates a depth of the object from a surface of the substance, using a plurality of specific wavelength images corresponding to different specific wavelength regions from each other; and an object image generator that generates an image of the object according to the depth of the object calculated by the depth calculator.