Abstract - A fl exible multiscale and directional representation for images isproposed. The scheme combines directional fi lter banks with theLaplacian pyramid to provides a sparse representation for two-dimensional piecewise smooth signals resembling images. Theunderlying expansion is a frame and can be designed to be atight frame. Pyramidal directional fi lter banks provide an effectivemethod to implement the digital curvelet transform. The regularityissue of the iterated fi lters in the directional fi lter bank is examined.
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