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To obtain the sparse property of signals better, a mliti-directional adaptive sparse model and recovery algorithm for it in compressive sensing were proposed. The mliti-directional autoregressive model could use the local statistical correlation and texture directions of image to represent signal sparsely. In a transform based codec framework, the transform matrix was regarded as a measurement matrix. The traditional inverse transform in decoder is replaced by the multidirectional adaptive sparse model. Simulation results over a wide range of images show that the proposed technique can improve the reconstruction quality of JPEG.
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