Method and system for removing isolated pixel portions in image

Details Method and system for removing isolated pixel portions in image Method and system for removing isolated pixel portions in image

2006-05-16

2006-05-16

Rogers, Scott A. (Department: 2627)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C382S275000

Reexamination Certificate

active

07046399

ABSTRACT:
Isolated pixel portions are removed from an image based upon a minimum of a two-step detection process. A first step is to compare the parallel edges of a predetermined unit area to a predetermined first threshold value so as to detect a possible line or continuous image in the predetermined area in a first direction. A second step is to ascertain that another line or continuous image exists in a second direction which is perpendicular to the first direction by comparing the average pixel values from lines of pixels in the second direction. Based upon the two comparison results, it is determined whether or not an isolated portion exists in the predetermined unit area.

REFERENCES:
patent: 4389677 (1983-06-01), Rushby et al.
patent: 6208763 (2001-03-01), Avinash

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