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Compressive sampling method and device

A compression sampling, sparse base technology, applied in television, electrical components, digital video signal modification and other directions, can solve the problems of different data volumes, inability to achieve acquisition, etc., to achieve the effect of high reconstruction quality and low computational complexity

Active Publication Date: 2012-06-27
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

In order to obtain the same quality reconstruction results on different blocks, more data needs to be collected on blocks with lower sparseness, and less data can be collected on blocks with higher sparsity, which cannot be realized in different blocks. Regions collect different amounts of data

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  • Compressive sampling method and device
  • Compressive sampling method and device

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Embodiment Construction

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0038] These and other aspects of embodiments of the invention will become apparent with reference to the following description and drawings. In these descriptions and drawings, some specific implementations of the embodiments of the present invention are specifically disclosed to represent some ways of implementing the principles of the embodiments of the present invention, but it should be understood that the scope of the embodiments of the present invention is not limited by this limit. On the contrary, the embodiments of the present...

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Abstract

The invention provides a compressive sampling method, which includes: acquiring signals of a target object, selecting a sparse base capable of indicating the signals of the target object sparsely; generating quick projection operators according to the initial sparse base, a preset random permutation matrix and a random matrix, solving the optimum value of subcomponents according to the quick projection operators, and obtaining optimized sparse components; determining the sparse coefficient of the optimized sparse components in the initial sparse base, and reconfiguring to-be-sampled signals according to the sparse coefficient. Data in different data quantity can be acquired on blocks different in sparse degree by the quick compressive sampling method, and the random projection operators have lower computing complexity so that higher reconfiguring quality can be obtained. Besides, the invention discloses a compressive sampling device.

Description

technical field [0001] The invention relates to the fields of signal sampling image reconstruction and the like, and in particular to a compression sampling method and device. Background technique [0002] In the field of signal compression and reconstruction, the Shannon-Nyquist sampling law points out that when the sampling frequency is not lower than twice the cutoff frequency of the signal, the original signal can be accurately reconstructed by the sinc function. However, there is a high degree of redundancy among the data collected in this sampling method, which is very unfavorable for storage and transmission, and further compression of the collected data is required. From the perspective of the whole process, the data collected at a high cost is finally discarded through the compression method. [0003] For this reason, based on the compressed sensing theory (D.L.Donoho, "Compressed sensing," IEEE Transactions on Information Theory, vol.52, no.4, pp.1289-1306, Apr., ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/132
Inventor 戴琼海付长军季向阳
Owner TSINGHUA UNIV
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