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- W2391592893 abstract "In order to overcome the frequency spectrum aliasing limitation,the Steerable Pyramid Contourlet Transform(SPCT) is proposed based on the nonsubsampled steerable pyramid and directional filter band.The Laplacian pyramid in the contourlet transform is replaced with the steerable pyramid which satisfies perfect reconstruction conditions.The steerable pyramid decomposes an image into multi-resolution detail subbands and one low-frequency subband,and the detail subbands are decomposed into directional subbands by the directional filter bank.The nonsubsampled steerable pyramid has no downsampling or upsampling,and hence it is shift-invariant.Denoising Lena images using adaptive thresholding show that the proposed algorithm can efficiently suppress frequency spectrum aliasing and preserve detailed information and textures of the original image.Compared with the denoising algorithm based on the wavelet transform and contourlet transform,the proposed algorithm improves both the peak signal-to-noise ratio and visual quality significantly." @default.
- W2391592893 created "2016-06-24" @default.
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- W2391592893 date "2009-01-01" @default.
- W2391592893 modified "2023-09-25" @default.
- W2391592893 title "Construction of Contourlet Transform Based on Steerable Pyramid and Its Application" @default.
- W2391592893 hasPublicationYear "2009" @default.
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