1. An image processing system for carrying out image processing on an image recorded on a color photographic photosensitive material which has at least three types of photographic photosensitive layers containing blue-light-photosensitive, green-light-photosensitive, and red-light-photosensitive silver halide emulsions on a light transmissible supporting member, and which is processed such that a silver image is generated in the photographic photosensitive layers after exposure of an image, said image processing system comprising: a light source for irradiating a light to a front side and a back side of the color photographic photosensitive material; a reading sensor for reading image information by light reflected from the front side and the back side of the color photographic photosensitive material, and light transmitted through the color photographic photosensitive material; an exposing device for exposing a predetermined unexposed area of the color photographic photosensitive material by each blue, green, and red light; a calculating device for determining correction conditions for correcting image information of each color on the basis of the lights reflected from the front side and an back side of the color photographic photosensitive material in an area exposed by each color and the light transmitted through the color photographic photosensitive material; and a correcting device for correcting a read image in accordance with the correction conditions.