Apparatus and method for rotating of three-dimensional images

Details Apparatus and method for rotating of three-dimensional images Apparatus and method for rotating of three-dimensional images

1990-10-10

1991-11-19

Razavi, Michael

Image analysis

Histogram processing

For setting a threshold

382 49, 340727, 395137, 395119, G06K 932, G06K 954, G06F 1500, G09G 106

Patent

active

050671677

ABSTRACT:
A system is described for rotating a 3D image so that a selected projection thereof is oriented to a chosen angular orientation in a three-dimensional space. The 3D image comprises a plurality of pixels, each pixel identified by a three-dimensional spatial coordinate value and a grey scale value. The system includes a data processor for storing the pixel coordinates and includes circuitry for rapidly altering the pixel spatial coordinate values to accomplish 90.degree. rotations of the 3D image about the axes of three-dimensional space. A pipeline processor is associated with the data processor for rapidly altering pixel spatial coordinate values to orient a 3D image to an arbitrary angle, but only about an axis perpendicular to a rotator plane of the three-dimensional space. The data processor is controlled to modify the spatial coordinate values of the 3D image, to rotate the image through three-dimensional space until the selected projection of the image is coplanar with the rotator plane. The pipeline processor is then controlled to orient the reoriented 3D image to the chosen angle about the perpendicular axis to the rotator plane.

REFERENCES:
patent: 4618991 (1986-10-01), Tabata et al.
patent: 4759076 (1988-07-01), Tanaka et al.
patent: 4975977 (1990-12-01), Kurosu et al.

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