Method of and device for image enhancement

Details Method of and device for image enhancement Method of and device for image enhancement

2005-01-11

2010-06-29

Tran, Douglas Q (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S001900

Reexamination Certificate

active

07746503

ABSTRACT:
A method of enhancing an image comprises determining whether brightness values have changed in an output screen of documents that include a text and an image, with respect to a pixel located in a predetermined edge detection region; calculating binarization data values based on each pixel brightness values of a plurality of windows that are formed by applying different samplings to the detected region, when the brightness values are changed in excess of a predetermined threshold Tha, and determining a connectivity of the calculated binarization data values with respect to each of a plurality of windows; estimating the pixel to be edge pixel when the binarization data values have a connectivity; and determining finally the estimated pixel to be an edge pixel when a number of pixels estimated as an edge is in excess of a predetermined fixed value THd, and if not, determining the estimated edge pixel as not being an edge pixel.

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Fisher et al., Logical AND/NAND, Hypermedia Image Processing Reference, 1994, University of Edinburgh, http://www.cee.hw.ac.uk/hipr/html/and.html.

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