电子测量技术
電子測量技術
전자측량기술
ELECTRONIC MEASUREMENT TECHNOLOGY
2015年
8期
79-81
,共3页
压缩感知%二值掩膜%DCT%稀疏表示
壓縮感知%二值掩膜%DCT%稀疏錶示
압축감지%이치엄막%DCT%희소표시
compressive sensing(CS)%binary mask%DCT%sparse representation
近年来兴起的压缩感知(compressive sensing,or compressed sampling,CS)理论对信号稀疏性的要求,使信号的稀疏表示得到了前所未有的关注。考虑到现实信号往往是非稀疏性的,而压缩感知理论要求被测信号必须满足稀疏性或在某个规范正交基下满足稀疏性,因此信号的稀疏性表示变得十分重要。主要研究探索了二值掩膜预处理的稀疏表示方法。结合二值掩膜的算法去除人眼不敏感的DCT系数,在不影响图像主观质量的前提下提高测量系数的稀疏度。实验表明提出的预处理方法减少了CS的重建时间,并且提高了图像的重建质量。
近年來興起的壓縮感知(compressive sensing,or compressed sampling,CS)理論對信號稀疏性的要求,使信號的稀疏錶示得到瞭前所未有的關註。攷慮到現實信號往往是非稀疏性的,而壓縮感知理論要求被測信號必鬚滿足稀疏性或在某箇規範正交基下滿足稀疏性,因此信號的稀疏性錶示變得十分重要。主要研究探索瞭二值掩膜預處理的稀疏錶示方法。結閤二值掩膜的算法去除人眼不敏感的DCT繫數,在不影響圖像主觀質量的前提下提高測量繫數的稀疏度。實驗錶明提齣的預處理方法減少瞭CS的重建時間,併且提高瞭圖像的重建質量。
근년래흥기적압축감지(compressive sensing,or compressed sampling,CS)이론대신호희소성적요구,사신호적희소표시득도료전소미유적관주。고필도현실신호왕왕시비희소성적,이압축감지이론요구피측신호필수만족희소성혹재모개규범정교기하만족희소성,인차신호적희소성표시변득십분중요。주요연구탐색료이치엄막예처리적희소표시방법。결합이치엄막적산법거제인안불민감적DCT계수,재불영향도상주관질량적전제하제고측량계수적희소도。실험표명제출적예처리방법감소료CS적중건시간,병차제고료도상적중건질량。
In recent years,the rise of the theory of compressed sensing signal sparsity requirements,so sparse representation of the signal received unprecedented attention.Taking into account the real signal is often non-sparsity, and compressive sensing theory must meet the requirements of the measured signal sparsity or meet at a certain sparseness orthonormal base,so sparse representation of the signal becomes very important.This paper studies explored the sparse representation of the binary mask pretreatment.The algorithm combines the binary mask the human eye is not sensitive to the removal of the DCT coefficients to improve the measurement sparsity factor in subj ective image without compromising quality. Experimental results show that our proposed method reduces pretreatment CS reconstruction time and improve the quality of the reconstructed image.
