Image analysis – Histogram processing
Reexamination Certificate
2006-09-05
2010-11-30
Le, Brian Q (Department: 2624)
Image analysis
Histogram processing
C382S274000
Reexamination Certificate
active
07844112
ABSTRACT:
We describe a device that dynamically increases the contrast of the effective gray level based on the gray level distribution of serial images, performs soft-transfer of dynamic contrast adjustment curve when a scene switch occurs thereby realizing adaptive contrast enhancing while effectively avoiding image flicker. A device and associated method for enhancing image contrast includes a gray level distribution statistic circuit to calculate gray level statistic data of an image responsive to an image brightness signal. An adaptive contrast mapping curve calculation circuit calculates a gray level mapping curve responsive to the gray level statistic data. An inter-frame curve soft-merging circuit performs inter-frame soft-merging to the gray level mapping curve. And a gray level mapping circuit performs gray level mapping of the input image brightness signal.
REFERENCES:
patent: 5727080 (1998-03-01), Cox et al.
patent: 5808697 (1998-09-01), Fujimura et al.
patent: 5937090 (1999-08-01), Kim
patent: 5963665 (1999-10-01), Kim et al.
patent: 6148103 (2000-11-01), Nenonen
patent: 6285798 (2001-09-01), Lee
patent: 6850642 (2005-02-01), Wang
patent: 7174049 (2007-02-01), Bhattacharjya
patent: 7424148 (2008-09-01), Goh
patent: 7433536 (2008-10-01), Kim
patent: 2001/0046320 (2001-11-01), Nenonen et al.
patent: 2002/0171852 (2002-11-01), Zhang et al.
Le Brian Q
Marger Johnson & McCollom PC
Patel Jayesh
Pixelworks, Inc.
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