Method and apparatus for reducing the gray scale resolution...

Details Method and apparatus for reducing the gray scale resolution... Method and apparatus for reducing the gray scale resolution...

G - Physics

06

K

354/66

G06K 5/00 (2006.01) G06K 7/00 (2006.01) G06K 9/00 (2006.01) G06K 9/56 (2006.01) G06K 11/00 (2006.01) H04N 1/403 (2006.01) H04N 1/41 (2006.01)

Patent

CA 1152219

A METHOD AND APPARATUS FOR REDUCING THE GRAY SCALE RESOLUTION OF A DIGITIZED IMAGE Abstract of the Disclosure A method and apparatus for reducing the gray scale resolution of a document. The apparatus includes a scanning module for scanning a document along x and y coordinates with regard thereto for generating pixels representing gray scale values for discrete areas of the document along the x and y coordinates, with each pixel having a predetermined number of bits. A high pass filter module is also included for summing the associated pixels within a window to produce a window sum as the window is moved relatively along coordinates corres- ponding to the x and y coordinates, and the high pass filter module also includes means for comparing a selec- ted pixel within a window with the associated window sum and predetermined criteria and for generating first and second output values in accordance therewith. The first and second output values have a fewer number of bits than the associated selected pixel.

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