Image rotation circuit

Details Image rotation circuit Image rotation circuit

1989-05-22

1990-04-10

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

340727, G06K 932

Patent

active

049167464

ABSTRACT:
An image rotation circuit comprises a first-in-first-out memory (FIFO) for holding a block of data representing a portion of an image. Data is read out of the FIFO a word at a time, and written back into the FIFO with a displacement of one bit position. Thus, the data effectively travels around a spiral data path, producing a serial output stream. A shift register assembles the output data into words, representing the rotated image.

REFERENCES:
patent: 3811110 (1974-05-01), Inose et al.
patent: 4052699 (1977-10-01), Micka et al.
patent: 4168488 (1979-09-01), Evans
patent: 4225929 (1980-09-01), Ikeda
patent: 4593407 (1986-06-01), Konishi et al.
patent: 4636783 (1987-01-01), Omachi
patent: 4736442 (1988-04-01), Kornfeld

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