Apparatus and method for improvement of 3D images derived from t

Details Apparatus and method for improvement of 3D images derived from t Apparatus and method for improvement of 3D images derived from t

1987-11-09

1989-05-16

Smith, Jerry

Boots, shoes, and leggings

340729, G06F 1542, G09G 106

Patent

active

048315281

ABSTRACT:
Data in tomographic images is convolved with a low-pass filter to reduce the maximum spatial frequency permitting unique mapping of surface images to a rasterized display. The filter may use linear or other weighting. Re-sampling after the filter is optional. The filtered tomographic data is employed to determine the locations and normal vectors of the surface. The locations and normal vectors employed by a computer graphics processor for applying shading in relation to the angle between the normal vector to a surface element and an operator- defined line of sight to the surface.

REFERENCES:
patent: 4002911 (1977-01-01), Hounsfield
patent: 4692806 (1987-09-01), Anderson et al.
patent: 4694404 (1987-09-01), Meagher
patent: 4697594 (1987-10-01), Mayo
patent: 4709231 (1987-11-01), Sakalbara
patent: 4710876 (1987-12-01), Cline et al.
patent: 4719585 (1988-01-01), Cline et al.
patent: 4737921 (1988-04-01), Goldwasser et al.

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