Subjects: Geosciences >> Space Physics submitted time 2017-03-10
Abstract：运动目标成像在实际应用中具有重要作用，而如何获取高质量运动目标图像是该领域研究中的一个热点问题。本文采用行扫描的采样方式，通过构造运动测量矩阵，建立一种基于压缩感知理论的运动物体成像模型，并通过仿真及实验，验证了该模型对于恢复运动物体图像信息的可行性。实验结果证明，该方法可获得高质量的运动物体成像。通过引入图像质量评价标准，分析了运动物体成像质量与速度之间的关系。本文还将该方法与普通压缩感知算法进行比较，结果证明，在相同速度下，该方法的成像质量更高。因而，该成像方法在无人机对地观测、产品线视频监测等领域有着很好的应用前景。
Peer Review Status:
Awaiting Review
Subjects: Geosciences >> Space Physics submitted time 2016-04-22
Abstract： In this paper,in order to realize the high-resolution spectral measurement of low light,we propose a new spectral measurement method which is based on a digital micro-mirror device (DMD) and a photoelectric multiplier tube (PMT). Firstly, the spectrum of the measured light is imaged on a DMD by the dispersive optics system based on a small-size slit. Secondly, by the rotation of the micro-mirrors of the DMD per column,the spectrum is reflected to a PMT according to the different wavelengths. Lastly, the measurement of the spectrum is achieved through the scanning mode. The contrast experiments of our method and a charge-coupled device (CCD) spectrometer are performed,and the experiments for different low light conditions are also performed. At last,the signal-to-noise ratio (SNR) experiment of the system is conducted. The results show that the spectral resolution is 0.23 nm,the sensitivity of the spectral system is less than 4.6 pW,and the SNR performance is also perfect. Compared with the conventional spectroscopy technique, this spectral measurement method has the merits of low price, easy implementation and stable performance.
Peer Review Status:Awaiting Review
Hits
Hits
Downloads
Comment