US PATENT DOCUMENTS 5.991, 456 A 11/1999 Rahman et al. 6,009,209 A 12/1999 Acker
et al. 4,970,683 A 11, 1990 Harshaw et al. 6,016,354 A 1/2000 Lin et al. 4,975,969 A …

(57) ABSTRACT A digital image processing technique is for detecting and correcting visual
imperfections using a reference image. A main image and one or more reference images …

(57) ABSTRACT A digital image processing technique detects and corrects visual
imperfections using a reference image. A main image and one or more reference images …

A database includes an identifier and associated parameters for each of a number of faces
to be recognized. A new acquired image from an image stream is received potentially …

5,905,807 A 5, 1999 Kado et al. 6,697.504 B2 2/2004 Tsai 5,911,139 A 6/1999 Jain et
al........................... 707/3 6,700,999 B1 3/2004 Yang 5,912,980 A 6, 1999 Hunke 6,714,665 …

(57) ABSTRACT A method of tracking faces in an image stream with a digital image
acquisition device includes receiving images from an image stream including faces …

(51) Int. Cl. Within a digital acquisition device, acquisition parameters of H04N
5/228(2006.01) a digital image are perfected as part of an image capture (52) US …

(57) ABSTRACT A method of tracking a face in a reference image stream using a digital
image acquisition device includes acquiring a full resolution main image and an image …

(57) ABSTRACT A technique involves distinguishing betWeen foreground and background
regions of a digital image of a scene. First and second images are captured of nominally a …

5,715,325 5,771,307 5,774,591 5,850,470 5,905,807 5,912,980 6,108,437 6,115,052
6,128,398 6,173,068 6,188,777 6,445,810 6,463,163 6,526,156 6,529,630 6,549,641 …