Image Compression Using Wedgelets

ABSTRACT

Images typically contain strong geometric features, such as edges, that impose a structure on pixel values and wavelet coefficients. Modeling the joint coherent behavior of wavelet coefficients is difficult, and standard image coders fail to fully exploit this geometric regularity. i.e. Most wavelet-based image coders fail to model the joint coherent behavior of wavelet coefficients near edges. Wedgelet is introduced as a geometric tool for image compression. Wedgelets offer a convenient parameterization for the edges in an image, Wedgelets offer piecewiselinear approximations of edge contours and can be efficiently encoded.

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