Ray Tracing Method Based on Spectral Distribution for Reproducing Realistic Images

The current paper proposes an improved reproduction algorithm that can produce a realistic image of a real scene based on the spectral distribution of light and objects, as perceived by human eyes. First, a backward ray tracing method is used where the spectral distribution of objects and illuminants is used to represent the physical characteristics in the real world. Next, an improved shading model is proposed based on applying BouguerBeer's law to consider the optical absorptive property of transparent objects. Finally, instead of a constant ambient light term, a new ambient light term is defined that considers the diffuse reflection of neighboring objects.