IMAGE CAPTURE, QUANTIZATION, AND ENHANCEMENT

Improving the performance of single chip image capture devices

[+] Author Affiliations
Barbara E. Marino

Loyola Marymount University, Department of Electrical Engineering and Computer Science, Los Angeles, California?90045 E-mail: bmarino@lmu.edu

Robert L. Stevenson

University of Notre Dame, Laboratory for Image and Signal Analysis, Department of Electrical Engineering, Notre Dame, Indiana?46556

J. Electron. Imaging. 12(2), 209-218 (Apr 01, 2003). doi:10.1117/1.1560643
History: Received Jun. 8, 1999; Revised Mar. 3, 2000; Revised Dec. 19, 2001; Accepted Dec. 2, 2002; Online April 11, 2003
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Single chip charge-coupled devices (CCDs) coupled with filters for isolating red, green, and blue color content are commonly used to capture color images. While this is more cost effective than multiple chip systems, best results are obtained when full RGB color information is obtained for every point in an image. The process of color subsampling in a single chip system degrades the resulting image data by introducing artifacts such as blurry edges and false coloring. We propose an algorithm for enhancing color image data that were captured with a typical single chip CCD array. The algorithm is based on stochastic regularization using a Markov random field model for the image data. This results in a constrained optimization problem, which is solved using an iterative constrained gradient descent computational algorithm. Results of the proposed algorithm show a marked improvement over the original sampled image data. © 2003 SPIE and IS&T.

© 2003 SPIE and IS&T

Citation

Barbara E. Marino and Robert L. Stevenson
"Improving the performance of single chip image capture devices", J. Electron. Imaging. 12(2), 209-218 (Apr 01, 2003). ; http://dx.doi.org/10.1117/1.1560643


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