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Title: Rotation of foveated image in the wavelet domain
Authors: Yu, H. 
Nguyen, V.-T.
Chang, E.-C. 
Issue Date: 2004
Citation: Yu, H., Nguyen, V.-T., Chang, E.-C. (2004). Rotation of foveated image in the wavelet domain. Proceedings - International Conference on Image Processing, ICIP 4 : 2515-2518. ScholarBank@NUS Repository.
Abstract: An advantage of wavelet transform is its efficiency in representing natural images, that is, a natural image can be accurately represented by only a small number of retained wavelet coefficients. It is interesting to know whether some common image operations, e.g. rotation, can be performed very fast in wavelet domain. Preferably, the running time should depend only on the number of retained coefficients, not the size of the original image. However, it is not clear how this can be achieved. In this paper, we consider rotation, and images with a special structure: foveated images. Wavelet coefficients of a foveated image vanish outside an arrangement of circles. We exploit this structure to derive algorithms that accurately approximate rotation. The running time is Θ(m) where m is the number of retained coefficients. Experiments show the accuracy of the approximation. © 2004 IEEE.
Source Title: Proceedings - International Conference on Image Processing, ICIP
ISBN: 0780385543
ISSN: 15224880
DOI: 10.1109/ICIP.2004.1421614
Appears in Collections:Staff Publications

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