Frame reconstruction of the Laplacian pyramid
作者： M.N. Do , M. Vetterli
DOI: 10.1109/ICASSP.2001.940631
关键词:
摘要: We study the Laplacian pyramid (LP) as a frame operator, and this reveals that usual reconstruction is suboptimal. With orthogonal filters, LP shown to be tight frame, thus optimal linear using dual operator has simple structure symmetrical with forward transform. For more general cases, we propose an efficient filter bank for in perform better than method. Numerical results indicate gains of 1 dB are actually achieved.
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