多帧迭代盲解卷积在激光反射断层成像的应用
发布时间：2018-07-18 21:49
【摘要】：激光反射断层成像是一种新型的远距离高分辨率成像手段。反射回波可以近似视作发射脉冲和目标反射系数投影分布的加噪卷积,因此发射脉冲的展宽将显著影响重建图像的分辨率。现有的滤波反投影方法不能有效解决这个问题,而脉冲压缩和解卷积可以从回波中还原目标反射率分布投影,进而提高重建图像质量。基于多角度测量的相似性,提出了一种多帧迭代盲解卷积逼近方法,对一维回波信号进行解卷积,并在实际激光雷达上进行了实验,重建结果表明,此算法能显著提高成像的分辨率和细节,并能对发射脉冲给出参考。
[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.
【作者单位】： 电子工程学院脉冲功率激光国家重点实验室;电子工程学院电子制约技术安徽省重点实验室;
【基金】：国家自然科学基金(61271353)
【分类号】：TN249
本文编号：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.
【作者单位】： 电子工程学院脉冲功率激光国家重点实验室;电子工程学院电子制约技术安徽省重点实验室;
【基金】：国家自然科学基金(61271353)
【分类号】：TN249
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