Image analysis – Image enhancement or restoration – Image filter
Reexamination Certificate
2006-01-20
2009-08-04
Werner, Brian P (Department: 2624)
Image analysis
Image enhancement or restoration
Image filter
C382S262000, C708S300000, C708S304000, C348S216100
Reexamination Certificate
active
07570833
ABSTRACT:
Disclosed are an image processing method capable of effectively removing noise contained in an image photographed in a low light environment by using statistical information, and a system thereof. There is provided an image processing method for an image consecutively inputted per frame unit, the method comprising: a step of segmenting the image into unit areas comprising a predetermined number of pixels; a first step of dividing each unit area into a low light region or a high light region by using the brightness of image data contained in said each unit area; a second step of outputting statistical information from image data contained in at least one unit area divided into the low light region, and detecting and removing Poisson and photon counting noise on the basis of the statistical information, the statistical information being the mean of the unit area; a third step of detecting a motion pixel from the image data; and a fourth step of detecting and removing false color noise from the image data on the basis of the detected motion pixel and the statistical information.
REFERENCES:
patent: 5442407 (1995-08-01), Iu
patent: 5768440 (1998-06-01), Campanelli et al.
patent: 5771318 (1998-06-01), Fang et al.
patent: 6295382 (2001-09-01), Karanovic
patent: 2004/0028289 (2004-02-01), Le Meur et al.
patent: 2004/0179108 (2004-09-01), Sorek et al.
patent: 2006/0055985 (2006-03-01), Ikeda
Sohn, K., et al. (Nov. 2001) “Impulsive noise filtering based on noise detection in corrupted digital color images.” Circuits, Systems, and Signal Processing, vol. 20 No. 6, pp. 643-654.
Rangayyan, R.M., et al. (Jul. 1998) “Adaptive-neighborhood filtering of images corrupted by signal-dependent noise.” Applied Optics, vol. 37 No. 20, pp. 4477-4487.
Lee, S-W., et al. (Jan. 2005) “Segmentation-based adaptive spatio-temporal filtering for noise canceling and MPEG pre-processing.” Int'l Conf. on Consumer Electronics 2005, pp. 359-360.
‘Noise-Adaptive Spatio-Temporal Filter for Real-Time Noise Removal in Low Light Images’ Lee et al., IEEE Transactions on Consumer Electronics, vol. 51, No. 2, May 2005, pp. 648-653.
AT4022 NoiseMaster II, Pentamicro Inc., Nov. 29, 2002.
Drennan Barry
Ladas & Parry LLP
Nextchip Co., Ltd.
Werner Brian P
LandOfFree
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