Image analysis – Image enhancement or restoration
Reexamination Certificate
2008-09-16
2008-09-16
Ahmed, Samir A (Department: 2624)
Image analysis
Image enhancement or restoration
C382S274000
Reexamination Certificate
active
11174679
ABSTRACT:
A method and system for contrast enhancement of an input image that utilizes luminance values of pixels of the input image to derive transforms. The method down-samples and partitions an image into sub-images whereby transforms are generated for selected sub-images. The selected sub-image transforms are used to generate an output transform which is applied to the input image for local contrast enhancement of the image. Furthermore, a decision method as to whether or not the input image is to receive local contrast enhancement wherein darkness features of the input image are compared to threshold values and combined into an expression which results in the determination.
REFERENCES:
patent: 2297691 (1942-10-01), Carlson
patent: 5450502 (1995-09-01), Eschbach et al.
patent: 6204940 (2001-03-01), Lin et al.
patent: 6205257 (2001-03-01), Eschbach
patent: 6646762 (2003-11-01), Balasubramanian et al.
patent: 6738161 (2004-05-01), Moriwaki
patent: 6748119 (2004-06-01), Bollman
patent: 7139416 (2006-11-01), Vuylsteke
patent: 2003/0108250 (2003-06-01), Luo et al.
patent: 2003/0161497 (2003-08-01), Vuylsteke
patent: 2004/0120599 (2004-06-01), Henley
patent: 2005/0013506 (2005-01-01), Yano
patent: 2005/0128496 (2005-06-01), Bala
patent: 2005/0163393 (2005-07-01), Asari
Zuiderveld, Karel, “Contrast Limited Adaptive Histogram Equalization”, Computer Vision Research Group, Utrecht University, Utrecht, The Netherlands, Copyright 1994 by Academic Press, Inc. VIII.5, Image Processing, pp. 474-485.
Durand, Fredo et al., “Fast Bilateral Filtering for the Display of High-Dynamic-Range Images”, SIGGRAPH 2002 Conference Graphics Proceedings, pp. 257-265. ACM Press, 2002.
Tomasi, C. et al., “Bilateral Filtering for Gray and Color Images”, Proceedings of the 1998 IEEE International Conference on Computer Vision, Bombay, India, pp. 836-846.
Schell, Michael J. et al., “The Reduced Monotonic Regression Method”, Journal of the American Statistical Association, Mar. 1997, vol. 92, No. 437, Theory and Methods, pp. 128-135.
Perona, Pietro et al., “Scale-Space and Edge Detection Using Anisotropic Diffusion”, Electrical Engingeering and Computer Science Department, University of California at Berkeley, Berkeley, California. 94720, Dec. 20, 1988, pp. 1-30.
Devlin, Kate, “A Review of Tone Reproduction Techniques”, Department of Computer Science, University of Bristol, Nov. 2002, pp. 1-13.
Arregui Damian
Dance Christopher R.
Ahmed Samir A
Fay Sharpe LLP
Koziol Stephen R
LandOfFree
Contrast enhancement of images does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Contrast enhancement of images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Contrast enhancement of images will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3928841