Image processing apparatus providing a bilevel image signal by c

Details Image processing apparatus providing a bilevel image signal by c Image processing apparatus providing a bilevel image signal by c

1994-03-17

1995-09-19

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358456, 358457, 358465, 358466, H04N 132, H04N 140

Patent

active

054521076

ABSTRACT:
An image processing apparatus includes a matrix register part for reading an original image for each area containing a predetermined number of pixels of the original image, and for extracting multilevel image data corresponding to the pixels of the read area, the pixels including a target pixel and neighboring pixels surrounding the target pixel, an averaging part for providing the average of multilevel image data based on the data of the pixels extracted by the matrix register part, and a binarization part for providing a bilevel image signal corresponding to the multilevel image data of the target pixel by using the average of the multilevel image data from the averaging part as a threshold value of binarization.

REFERENCES:
patent: 5072291 (1991-12-01), Sekizawa
patent: 5200841 (1993-04-01), Kotaki

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