Determining orientation of transformed image

Details Determining orientation of transformed image Determining orientation of transformed image

1986-06-26

1988-06-14

Harkcom, Gary V.

Boots, shoes, and leggings

340707, 340723, 340724, 340728, 358101, 382 25, 382 41, 382 44, 364522, G06F 1546, G06K 948

Patent

active

047516607

ABSTRACT:
A method of processing video signals to achieve a visual effect involving three-dimensional manipulation of an input image includes the use of a circuit for determining pixel address by pixel address whether in the resulting transformed image the front or the back of the input image should be displayed. The circuit comprises a device defining an incremental surface in the transformed image by at least three adjacent non-collinear pixel addresses from the transformed image, a circuit for determining from the transformed pixel addresses whether or not a vector normal to the incremental surface points towards or away from a viewing point, and a device for selecting for display at one of the transformed pixel addresses the corresponding portion of the front or the back of the input image in dependence on whether the vector points towards or away from the viewing point.

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