EPFL | Biomedical Imaging Group

Wavelet Primal Sketch Representation Using Marr Wavelet Pyramid and Its Reconstruction

D. Van De Ville, M. Unser

Proceedings of the SPIE Optics and Photonics 2009 Conference on Mathematical Methods: Wavelet XIII, San Diego CA, USA, August 2-6, 2009, vol. 7446, pp. 74460W-1/74460W-8.

Based on the class of complex gradient-Laplace operators, we show the design of a non-separable two-dimensional wavelet basis from a single and analytically defined generator wavelet function. The wavelet decomposition is implemented by an efficient FFT-based filterbank. By allowing for slight redundancy, we obtain the Marr wavelet pyramid decomposition that features improved translation-invariance and steerability. The link with Marr's theory of early vision is due to the replication of the essential processing steps (Gaussian smoothing, Laplacian, orientation detection). Finally, we show how to find a compact multiscale primal sketch of the image, and how to reconstruct an image from it.

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AUTHOR="Van De Ville, D. and Unser, M.",
TITLE="Wavelet Primal Sketch Representation Using {M}arr Wavelet Pyramid
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	{W}avelet {XIII}",
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