Boots – shoes – and leggings
Patent
1986-08-15
1989-05-30
Shaw, Gareth D.
Boots, shoes, and leggings
G06F 314
Patent
active
048357120
ABSTRACT:
Method and apparatus for shading an image volume so that surfaces and boundaries may be rendered to subvoxel accuracy. A gradient vector is generated for each voxel of an image volume by calculating the change in opacity across that voxel in relation to its immediate neighbors. The gradient in the X, Y and Z direction of a three-dimensional voxel array is used to define a gradient length. By multiplying the RGBA values of individual voxels by their gradient length, a image volume may be shaded so that surfaces remain, but the interiors of solids are rendered more transparent revealing additional detail. Surfaces are shaded by multiplying the RGBA values of each voxel by a shading function. A reference point for a light source illuminating the displayed image volume is defined. A light vector is chosen for each voxel, a shading function is then generated based on the angle between the gradient vector and the light vector. The shading function allows for inputs for backlighting and side lighting.
REFERENCES:
patent: 4649499 (1987-03-01), Sutton et al.
patent: 4685070 (1987-08-01), Flinchbaugh
patent: 4692878 (1987-09-01), Ciongoli
patent: 4698778 (1987-10-01), Ito et al.
patent: 4706205 (1987-11-01), Akai et al.
patent: 4720803 (1988-01-01), Ishii
patent: 4730261 (1988-03-01), Smith
Carpenter Loren C.
Drebin Robert A.
Mills John G.
Pixar
Shaw Gareth D.
LandOfFree
Methods and apparatus for imaging volume data with shading does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for imaging volume data with shading, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for imaging volume data with shading will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2158633