多幀迭代盲解卷積在激光反射斷層成像的應用
發(fā)布時間:2018-07-18 21:49
【摘要】:激光反射斷層成像是一種新型的遠距離高分辨率成像手段。反射回波可以近似視作發(fā)射脈沖和目標反射系數(shù)投影分布的加噪卷積,因此發(fā)射脈沖的展寬將顯著影響重建圖像的分辨率,F(xiàn)有的濾波反投影方法不能有效解決這個問題,而脈沖壓縮和解卷積可以從回波中還原目標反射率分布投影,進而提高重建圖像質(zhì)量;诙嘟嵌葴y量的相似性,提出了一種多幀迭代盲解卷積逼近方法,對一維回波信號進行解卷積,并在實際激光雷達上進行了實驗,重建結(jié)果表明,此算法能顯著提高成像的分辨率和細節(jié),并能對發(fā)射脈沖給出參考。
[Abstract]:Laser reflective tomography is a new high resolution imaging method. The reflection echo can be regarded as an additive convolution of the projective distribution of the emission pulse and the target reflection coefficient. Therefore, the broadening of the emission pulse will significantly affect the resolution of the reconstructed image. The existing filtering back projection method can not solve this problem effectively. The pulse compression and convolution can reduce the target reflectivity distribution from the echo and improve the quality of the reconstructed image. Based on the similarity of multi angle measurement, a multi frame iterative blind deconvolution approximation method is proposed. The deconvolution of one dimension echo signal is carried out and the experiment is carried out on the actual excitation radar. The reconstruction results show that this calculation is used. The method can significantly improve the resolution and detail of the imaging, and provide reference for the transmitting pulse.
【作者單位】: 電子工程學院脈沖功率激光國家重點實驗室;電子工程學院電子制約技術(shù)安徽省重點實驗室;
【基金】:國家自然科學基金(61271353)
【分類號】:TN249
本文編號:2132880
[Abstract]:Laser reflective tomography is a new high resolution imaging method. The reflection echo can be regarded as an additive convolution of the projective distribution of the emission pulse and the target reflection coefficient. Therefore, the broadening of the emission pulse will significantly affect the resolution of the reconstructed image. The existing filtering back projection method can not solve this problem effectively. The pulse compression and convolution can reduce the target reflectivity distribution from the echo and improve the quality of the reconstructed image. Based on the similarity of multi angle measurement, a multi frame iterative blind deconvolution approximation method is proposed. The deconvolution of one dimension echo signal is carried out and the experiment is carried out on the actual excitation radar. The reconstruction results show that this calculation is used. The method can significantly improve the resolution and detail of the imaging, and provide reference for the transmitting pulse.
【作者單位】: 電子工程學院脈沖功率激光國家重點實驗室;電子工程學院電子制約技術(shù)安徽省重點實驗室;
【基金】:國家自然科學基金(61271353)
【分類號】:TN249
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