Share Email Print
cover

Proceedings Paper

Superresolution reconstruction of images by weighted wavelet bicubic interpolation search algorithm
Author(s): You-shan Qu; Chuan-ping Bian; Ying-cai Li
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The variable relationship between the threshold of high-frequency extrapolation and the entropy of its correspondent reconstructed image in the Wavelet Bicubic Interpolation Algorithm is analyzed. The information entropy is used as a cost function and a Maximal Entropy Wavelet Bicubic Interpolation Search Algorithm is proposed. This algorithm can automatically search an extrapolation threshold to reconstruct an image with maximal entropy. Although the detail information of the reconstructed maximal entropy image is larger than its original image, it may introduce a lot of uncertain and incorrect information. In order to remedy this shortcoming of the proposed algorithm, a new cost function based on the old one is established. The new cost function can not only remedy the shortcoming of the entropy function as a cost function, but also a weight introduced in the new cost function can be adjusted to reconstruct different superresolution images to satisfy different practical requirements. Thus a Weighted Wavelet Bicubic Interpolation Search Algorithm is established. The experiment results prove that if the distribution of the processed images is close to the maximum likelihood distribution, a large weight will be selected to reconstruct a relative better superresolution image with better details, and if the distribution of the processed images is far from the maximum likelihood distribution, a little weight will be selected to reconstruct a relative better superresolution image with better visual effect. Therefore, the weight in the new algorithm can be selected from the requirements to satisfy different practical cases.

Paper Details

Date Published: 11 January 2007
PDF: 8 pages
Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62793M (11 January 2007); doi: 10.1117/12.725362
Show Author Affiliations
You-shan Qu, Xi'an Institute of Optics and Precision Mechanics (China)
Chuan-ping Bian, Xi'an Institute of Optics and Precision Mechanics (China)
Ying-cai Li, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 6279:
27th International Congress on High-Speed Photography and Photonics

© SPIE. Terms of Use
Back to Top