GLOSS EXPRESSION METHOD

PROBLEM TO BE SOLVED: To provide a gloss expression method capable of making a glossiness closer to reality compared to a conventional technique and preparing the image of a three-dimensional structure expressing the glossiness without being accompanied by correction work based on the sensitivity of a user. SOLUTION: A change normal vector calculation part 105 decides change normal vectors for which the normal vectors of respective parts of the surface of the three-dimensional structure virtually displayed at a display device are dispersed for a displacement amount based on a stipulated distribution for the respective parts. A rendering processing part 107 applies a color sample spectral reflectance calculation function to an incident angle, an observation angle and a shifting angle, calculates spectral reflectance for the respective parts of the surface of the three-dimensional structure and calculates the values of the colors of the respective parts of the surface of the three-dimensional structure from the calculated spectral reflectance. COPYRIGHT: (C)2004,JPO&NCIPI