Translucent or transparent quality of computer-generated 3-D images with a complex of reflected scene among boundary surfaces may be visualized using a constructive solid geometry model (CSGM) and a ray tracing method (RTM) on a color CRT. Generally, the CSGM is composed of a combination of some primitives and quadratic surfaces. The RTM has been widely used as the principal means for displaying computer-generated 3-D images with reality. The effects of additive and pseudo-subtractive color mixings are compared with a view to examining the visual appearance of color and image quality of transparent objects on a color CRT. The relation between the degree of transparency and the value of depth level: a kind of parameter for taking stock of the total number of times of specular reflection at the surface of opaque objects and/or that of reflection and refraction at the border of transparent media is discussed from a viewpoint of color rendering and color shift.
[1]
HENRI GOURAUD,et al.
Continuous Shading of Curved Surfaces
,
1971,
IEEE Transactions on Computers.
[2]
Masayuki Iizuka,et al.
Generation of quasi-fine colour images by random dither techniques and photographic multiple exposure techniques
,
1987
.
[3]
Donald P. Greenberg,et al.
The hemi-cube: a radiosity solution for complex environments
,
1985,
SIGGRAPH.
[4]
Turner Whitted,et al.
An improved illumination model for shaded display
,
1979,
CACM.
[5]
Bui Tuong Phong.
Illumination for computer generated pictures
,
1975,
Commun. ACM.
[6]
James F. Blinn,et al.
Simulation of wrinkled surfaces
,
1978,
SIGGRAPH.