An image processing apparatus including a first obtaining unit configured to obtain first image data to be printed, a second obtaining unit configured to obtain second image data indicating a subject identical to that of the first image data and expressed by a geometric condition different from that of the first image data, and a determination unit configured to determine ink amounts of respective inks including a first ink that reflects light in a normal reflection and a second ink that is different from the first ink and has a ratio of an intensity of light reflected in the normal reflection direction to an intensity of light reflected in the diffuse direction smaller than that of the first ink in a case where light based on brightness at each position of the first image data and the second image data.