Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1995-08-14
1998-11-17
Lee, Thomas D.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358461, 382266, 382274, 382254, H04N 140, G06K 940
Patent
active
058384634
ABSTRACT:
A low cost binary image processor in an image processing apparatus designed to perform the shading correction and binarize the edge emphasis of an image with an automatic gain control according to background intensity using half-tone processing. This binary image processor comprises an image sensor for reading an image from a document, a converter for converting an electric signal read-out from said image sensor into image data, a threshold generator for generating a threshold value corresponding to each input pixel of the image data, an image processor for correcting shading and emphasizing edge of said image data to produce processed data having said shading corrected and edge emphasized on a line-by-line basis, and a binarizing circuit for using half-tone processing to binarize each pixel of the processed data on a basis of said threshold value and generate binary data accurately representing the image.
REFERENCES:
patent: 5165072 (1992-11-01), Kurita
patent: 5408338 (1995-04-01), Koike
patent: 5446476 (1995-08-01), Kouzaki
patent: 5523861 (1996-06-01), Tanaka et al.
"Television Engineering Handbook"; Benson; pp. 2.29, 4.18, 4.19, 17.10, 17.11.
Bushnell Esq. Robert E.
Grant II Jerome
Lee Thomas D.
Samsung Electronics Co,. Ltd.
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