1. An image processing apparatus comprising: an input unit configured to input a color signal representing an image and an image quality signal representing a texture of the image; a conversion unit configured to convert the image quality signal into a physical quantity signal representing a physical quantity; and a determination unit configured to determine a color material amount for outputting the image based on the color signal and the physical quantity signal, wherein the image quality signal includes a signal representing glossiness value and a signal representing gloss clarity, and the physical quantity corresponding to the signal representing the glossiness value and the physical quantity corresponding to the signal representing the gloss clarity are a refractive index and a surface roughness of the image.