Data acquisition in tomography
Image-data reduction technique
High-speed image generation of complex solid objects using octree encoding
Displaying a single parameter image
Shading apparatus for displaying three dimensional objects
System and method for the display of surface structures contained within the interior region of a solid body
Dividing cubes system and method for the display of surface structures contained within the interior region of a solid body
Three dimensional medical image display system Patent #: 4737921
ApplicationNo. 07/118628 filed on 11/09/1987
US Classes:382/131, Tomography (e.g., CAT scanner)345/419Three-dimension
ExaminersPrimary: Smith, Jerry
Assistant: Kibby, Steven G.
Attorney, Agent or Firm
International ClassG06T 17/00 (20060101)
AbstractData 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.