Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-04-18
1994-03-22
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358456, 382 51, H04N 140
Patent
active
052969401
ABSTRACT:
A method and an apparatus for converting the gray images inputted from the image pickup elements into binary images without losing the shape information of the gray images. The image processing method comprises the steps of obtaining the maximum values and the minimum values of the density for each horizontal scanning line and each vertical scanning line of the inputted images, obtaining the threshold values from the adjacent maximum values and minimum values, obtaining the two type binary images for each horizontal scanning line and each vertical scanning line with the threshold values, obtaining the composed binary images with the logical product or the logical sum between the respective pixels of the above two type binary images.
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patent: 5065444 (1991-11-01), Garber
patent: 5133022 (1992-07-01), Weideman
Coles Sr. Edward L.
Jackson Jill
Toyo Boseki Kabushiki Kaisha
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