Image analysis – Histogram processing – For setting a threshold
Patent
1990-02-28
1992-05-26
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 49, G06K 936
Patent
active
051174685
ABSTRACT:
An image processing system for extracting a plurality of local images each composed of m.times.n pixels, successively from a two-dimensional original image, to process the extracted local images and to convert the original imae into a second image composed of modified pixel data corresponding to the local images is disclosed which system includes a plurality of local image extracting circuits for temporarily storing time-sequentially applied pixel data in each local image extracting circuit while shifting the storage position thereof, to deliver m.times.n pixels having a predetermined positional relation on the original image, from each local image extracting circuit in parallel, a first data transfer circuit for allotting pixels extracted successively from the original image, to the local image extracting circuits, a local image reconstruction circuit for combining a plurality of pixels from the local image extracting circuits to reconstruct a plurality of local images deviated from each other by one pixel on the original image and to deliver the local images in parallel, a local image processing circuit for processing the local images from the local image reconstruction circuit in parallel, to convert the local images into a plurality of modified pixel data for forming the second image, and a second data transfer circuit for transferring the modified pixel data to an image memory.
REFERENCES:
patent: 4363104 (1982-12-01), Nussmeier
patent: 4484349 (1984-11-01), McCubbrey
patent: 4550437 (1985-10-01), Kobayashi et al.
patent: 4710965 (1987-12-01), Kobayashi
Fukuda Kouji
Hino Masatoshi
Machida Tetsuo
Boudreau Leo H.
Fox David
Hitachi , Ltd.
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