Image analysis – Color image processing – Color correction
Reexamination Certificate
2006-06-27
2006-06-27
Bali, Vikkram (Department: 2624)
Image analysis
Color image processing
Color correction
C382S254000
Reexamination Certificate
active
07068841
ABSTRACT:
A method and apparatus for enhancing a digital image. First, human faces are located within a digital image. The digital image is then analyzed, including analysis of the regions determined to be human faces and the analysis of the digital image as a whole. A tone mapping function is then determined for enhancing the image quality of the digital image. The tone mapping function is determined using both the analysis of detected faces and the analysis of the image as a whole to obtain a tone mapping function that incorporates both psychological factors (e.g., average face region lightness and average picture lightness) and signal factors (e.g., digital resolution, face region contrast, histogram uniformity, and noise issue). The tone mapping function is then applied to the digital image so as to produce an enhanced digital image. The present invention is automatic and does not require that the user provide any input. In addition, because the method and apparatus of the present invention incorporates both psychological factors and signal factors, the resulting enhanced images are perceived to be of good image quality.
REFERENCES:
patent: 5130935 (1992-07-01), Takiguchi
patent: 5497431 (1996-03-01), Nakamura
patent: 5528339 (1996-06-01), Buhr et al.
patent: 5539523 (1996-07-01), Nakai et al.
patent: 6535301 (2003-03-01), Kuwata et al.
patent: 6587225 (2003-07-01), Sakatani et al.
patent: 6748097 (2004-06-01), Gindele et al.
patent: 2002/0172419 (2002-11-01), Lin et al.
patent: WO 98/39914 (1998-09-01), None
Materka, A. and Strzelecki, M., “Texture Analysis Methods—A Review”, Technical University of Lodz, Institute of Electronics, COST B11 Report, Brussels, 1998.
Sonka, Hlavac, and Boyle, “Image Processing, Analysis, and Machine Vision”, 2nd Edition, © 1999, Brooks/Cole Publishing Company, pp. 59-60.
Kim Y H et al: “Region Based Histogram Specification for Dynamic Range Expansion” Proceedings of the SPIE, SPIE, Bellingham VA US vol. 3302, 1998 pp. 90-97.
Fischer S et al: “Analysis of skin lesions with pigmented networks” Proceedings of the International Conference on Image Processing (ICIP) Lausanne, Sep. 16-19, 1996, New York, IEEE US vol. 1 pp. 323-326.
Bali Vikkram
Hewlett--Packard Development Company, L.P.
LaRose Colin
LandOfFree
Automatic digital image enhancement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic digital image enhancement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic digital image enhancement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3703400