Method for adaptively masking off a video window in an overscann

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

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358280, 358282, 382 22, H04N 1387

Patent

active

047745690

ABSTRACT:
A method for extracting (masking off) a desired video window, such as that which forms a scanned image of a document or a portion thereof, from a overscanned image stored in a frame buffer is disclosed herein. Specifically, this method involves first determining horizontal pixel locations for left and right edges of the document for each of a plurality of scan lines located within said scanned image. Then, histograms of the left and right edge locations are fabricated. Once this has occurred, the positions of top and bottom edges of an escribing rectangle is found. The escribing rectangle is a rectangular area, located within the frame buffer, which includes the entire document. Now, with the top and bottom edge locations known, the inventive method locates the right and left edge locations of the escribing rectangle by suitably analyzing the histogram results. Next, memory address corresponding to the first pixel location in the escribing rectangle and the vertical and horizontal size of the rectangle are determined, using all the edge locations of the escribing rectangle, and then applied as input to addressing circuitry located within the frame buffer. Once this occurs, then all (or a portion of) the pixel values stored within the frame buffer and located on and within the escribing rectangle are successively accessed and routed to an output connection as being those pixel values that form the image, or a selected portion thereof, of the document.

REFERENCES:
patent: 4053928 (1977-10-01), Orton et al.
patent: 4189711 (1980-02-01), Frank
patent: 4399461 (1983-08-01), Powell
patent: 4428077 (1984-01-01), Shimada
patent: 4451854 (1984-05-01), Daigo
patent: 4499598 (1985-02-01), Chittineni
patent: 4501016 (1985-02-01), Persoon et al.
patent: 4553260 (1985-11-01), Belt et al.
patent: 4561104 (1985-12-01), Martin
patent: 4569079 (1986-02-01), Yoshida
patent: 4575751 (1986-03-01), Duschl
patent: 4577235 (1986-03-01), Kannapell et al.
patent: 4578765 (1986-03-01), Barker
patent: 4611349 (1986-09-01), Hou
patent: 4618990 (1986-10-01), Sieb et al.
patent: 4625330 (1986-11-01), Higgins
patent: 4631599 (1986-12-01), Cawkell
patent: 4636863 (1987-01-01), Kaizaki et al.
patent: 4637059 (1987-01-01), Habitzreiter et al.
patent: 4638369 (1987-01-01), Hsieh
patent: 4648120 (1987-03-01), Chittineni
patent: 4672461 (1987-06-01), Yoshida
patent: 4685143 (1987-08-01), Choate
patent: 4700237 (1987-10-01), Yoshioka

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