1. An image processing apparatus, comprising: a color imager that generates an image signal from an excitation light to which an object is exposed, the image signal including at least first, second and third color components; a memory that stores color matrix information based on a percentage of each of the second color component and the third color component with respect to the first color component, the color matrix information corresponding to the excitation light from which the color imager generates the image signal, the matrix information being determined in advance based on spectral characteristics of the color imager; and circuitry that corrects color components of the image signal based on an amount of the first color component and the color matrix information.