Image analysis – Pattern recognition – Feature extraction
Reexamination Certificate
2007-08-28
2007-08-28
LaRose, Colin (Department: 2624)
Image analysis
Pattern recognition
Feature extraction
C382S269000
Reexamination Certificate
active
10697361
ABSTRACT:
A system that detects the location as well as the luminance transition range of slant image edge in a digital image. The variance value of the pixels inside a rectangular image window centered with a current pixel is checked to determine if the current pixel is in an edge region or a in non-edge region. If the current pixel is in a non-edge region, no further checking is performed. Otherwise, it is determined if the current pixel is a center pixel in a luminance transition range of a slant edge. The values of the current pixel and its neighboring pixels inside the rectangular window are used to determine if the selected pixel is the center pixel in a luminance transition range of a slant edge. If it is, then the exact length of the luminance transition range of the slant edge is determined. Through such a detection process, both the center position and the luminance transition range of slant image edge can be determined.
REFERENCES:
patent: 4853970 (1989-08-01), Ott et al.
patent: 6304269 (2001-10-01), Ito
patent: 6477282 (2002-11-01), Ohtsuki et al.
patent: 6982723 (2006-01-01), Szymaniak
patent: 2004/0189874 (2004-09-01), Wang et al.
Kim Yeong-Taeg
Wang Xianglin
LaRose Colin
Myers Dawes Andras & Sherman LLP
Sherman, Esq. Kenneth L.
Zarrabian, Esq. Michael
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