Three-dimensional image processing apparatus

Details Three-dimensional image processing apparatus Three-dimensional image processing apparatus

Filed on

1995-10-24

Date issued

1998-05-19

Examiner

Smith, Ruth S.

Patent Class

Computer graphics processing and selective visual display system

SubClass

Computer graphics processing

SubSubClass

Three-dimension

Other Related Categories

382131, 378901, G06F 1542

Type

Patent

Status

active

Patent number

RE0357987

Description

ABSTRACT:
A three-dimensional image processing apparatus includes a first three-dimensional memory for storing first voxel data representing a three-dimensional CT image, a level detector for comparing the first voxel data with CT values of an epidermis, a bone, and a blood vessel, second three-dimensional memories for storing second voxel data (binary) of the epidermis, the bone, and the blood vessel obtained by the level detector, a distance detector for detecting distances between a predetermined projection plane in a three-dimensional space and the second voxel data, a minimum detector for detecting a distance between the projection plane and one of the second voxel data of the epidermis, bone, and blood vessel, which is closest to the projection plane, and a surface image generating circuit for shading minimum values of pixels in the projection plane to generate a surface image. The projection plane in the three-dimensional space is partially moved into a memory space in the second voxel data, thereby simulating a surface image obtained when a three-dimensional CT image is cut.

REFERENCES:
patent: 4131021 (1978-12-01), Mezrich et al.
patent: 4630203 (1986-12-01), Szirtes
patent: 4631750 (1986-12-01), Gabriel et al.
patent: 4751643 (1988-06-01), Lorensen et al.

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