空间调制全偏振成像系统的最优解调算法

IF 2 4区地球科学 Q4 GEOGRAPHY, PHYSICAL

Photogrammetric Engineering and Remote Sensing Pub Date : 2020-12-01 DOI:10.14358/pers.86.12.761

Zhang Ziyang, Song Ye, Li Shu, Yuting Zhang, Zhang Wentao, Wang Jiejun, Xin-qiang Wang, Wang Fangyuan

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引用次数: 1

摘要

空间调制全偏振成像系统可以通过单次成像获得全斯托克斯参数信息，具有较强的实时性和稳定性。由于所有偏振信息都被调制成干涉图，解调成为必不可少的步骤。随着所获得的图像的分辨率不断增加，要计算的数据也增加。因此，解调处理需要更高的速度。本文提出了一种局部滤波方法，并在频域中绕过了频率集中方法，以提高解调速度。1024×1024像素干涉图的解调时间从3.027 473 s缩短到0.134 637 s，解调速度提高了97.72%；6144×6144像素干涉图解调时间从444.329 92 s缩短到4.637 069 s，解调速率提高了98.75%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Optimal Demodulation Algorithm of Spatially Modulated Full-Polarization Imaging System

Spatially modulated full-polarization imaging systems can obtain full Stokes parameter information by single imaging, with strong characteristics of real-time execution and stability. Since all the polarization information is modulated into an interferogram, demodulation becomes an essential step. As the resolution of the obtained image continuously increases, the data to be calculated also increase. Therefore, a higher speed for the demodulation process is requisite. This article proposes a local filtering method and bypasses the frequency centralization method in the frequency domain to improve the speed of demodulation. The demodulation time of an interferogram of size 1024×1024 pixels was reduced from 3.027 473 s to 0.134 637 s, increasing the speed of demodulation by 97.72%. Meanwhile, the demodulation time of an interferogram of size 6144×6144 pixels was reduced from 444.329 92 s to 4.637 069 s, increasing the speed of demodulation by 98.75%.

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来源期刊

Photogrammetric Engineering and Remote Sensing 地学-成像科学与照相技术

CiteScore

1.70

自引率

15.40%

发文量

审稿时长

9 months

期刊介绍： Photogrammetric Engineering & Remote Sensing commonly referred to as PE&RS, is the official journal of imaging and geospatial information science and technology. Included in the journal on a regular basis are highlight articles such as the popular columns “Grids & Datums” and “Mapping Matters” and peer reviewed technical papers. We publish thousands of documents, reports, codes, and informational articles in and about the industries relating to Geospatial Sciences, Remote Sensing, Photogrammetry and other imaging sciences.