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Your search keyword '"Sheppard, David G."' showing total 16 results
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16 results on '"Sheppard, David G."'

4. Lapped nonlinear interpolative vector quantization and image super-resolution

Author

Sheppard, David G., Panchapakesan, Kannan, Bilgin, Ali, Hunt, Bobby R., and Marcellin, Michael W.

Subjects
Image coding -- Research, Image processing -- Research, Imaging systems -- Image quality, Business, Computers, Electronics, Electronics and electrical industries
Abstract

Research describing an improved image restoration algorithm is presented. Using original and diffraction-limited image pairs test results show that the nonlinear algorithm produces super-resolution.

Published
2000

10. Blur identification from vector quantizer encoder distortion

Author

Panchapakesan, Kannan, Sheppard, David G., Marcellin, Michael W., and Hunt, Bobby R.

Subjects
Image processing -- Research, Business, Computers, Electronics, Electronics and electrical industries
Abstract

A technique for identifying image blur using vector quantizer encoder distortion is presented. This technique needs a set of training images blurred by each of the candidate blur functions to design a corresponding vector quantizer codebook.

Published
2001

13. Comparison of image reconstruction algorithms using adaptive optics instrumentation

Author

Tyler, David W., primary, Ford, Stephen D., additional, Hunt, Bobby R., additional, Paxman, Richard G., additional, Roggemann, Michael C., additional, Rountree, Janet C., additional, Schulz, Timothy J., additional, Schulze, Kathy J., additional, Seldin, John H., additional, Sheppard, David G., additional, Stribling, Bruce E., additional, van Kampen, William C., additional, and Welch, Byron M., additional

Published
1998
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16. A vector quantizer for image restoration.

Author

Sheppard, David G., Bligin, Ali, Nadar, Mariappan S., Hunt, Bobby R., and Marcellin, Michael W.

Subjects
*NONLINEAR mechanics, *MATHEMATICAL models
Abstract

Provides information on the presentation of a novel technique for image restoratin based on nonlinear interpolative vector quantization (NLVQ). Information on the image restoration; Detailed information on nonlinear VQ image restoration; Conclusion reached.

Published
1998
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