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Showing 1 to 2 of 2 for “"contourlet transform"”.
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Digital Watermarking for Depth-Image-Based Rendering 3D Images and Its Application to Quality Evaluation
… 2D image and video watermarking method based on contourlet transform, which is then extended to a robust contourlet-based watermarking algorithm for DIBR 3D images. The watermark is embedded into the center view by quantizing certain contourlet coe cients. The virtual left and right views are …
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Signal representations: from images to irregular-domain signals
… from smooth edges, the optimal sparsity of the contourlet transforms, that provide directional multiresolution representations, is established under a sufficient condition on the directional decay of the contourlet profiles in frequency-domain. This Fourier-based condition does not require …