Implementation for high speed arbitrary angle of rotation

Details Implementation for high speed arbitrary angle of rotation Implementation for high speed arbitrary angle of rotation

1996-03-22

1998-08-11

Jankus, Almis R.

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

G06T 300

Patent

active

057933782

ABSTRACT:
A circuit for rotating a digital image through any angle at the rate of one pixel per clock period. First, the circuit divides the image to be rotated into blocks which can be rotated without pause once each is started. Then a nearest neighbor calculating circuit is used to determine the value of each rotated pixel in the block. The circuit is divided and pipelined so that each part can produce its output in one clock cycle. The nearest neighbor calculation is done in two sections of the circuit, and other sections of the circuit set up initial conditions or provide for transitions from one rotated scan line, or block, to the next.

REFERENCES:
patent: 5412768 (1995-05-01), Ozaki

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