SAR分布目标多视图像分辨特性研究

王岩飞; 刘中梅

doi:10.11999/JETI170118

SAR分布目标多视图像分辨特性研究

doi: 10.11999/JETI170118

王岩飞¹,
刘中梅²

1.
(中国科学院电子学研究所北京 100190) ②(中国科学院大学北京 100049)

基金项目:

国家自然科学基金(61471340)

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- 文章访问数: 1386
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- 被引次数: 0
出版历程
- 收稿日期: 2017-02-15
- 修回日期: 2017-04-20
- 刊出日期: 2017-10-19

Study on Distributed Targets Resolution of Multilook SAR Image

WANG Yanfei¹,
LIU Zhongmei²

1.
(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)

Funds:

The National Natural Science Foundation of China (61471340)

摘要

摘要: 该文提出了结合目标特性与图像多视数对SAR分辨特性进行分析和评定的方法。基于对SAR目标可分辨概率的研究，以及对SAR复散射回波信号特性的分析，得到了目标之间关于信号幅度比、相位差和多视数的联合概率密度函数，建立了SAR分布目标可分辨特性与目标统计特性以及图像多视数之间的数学关系模型。结合目标可区分条件，探讨分析了目标统计特性和多视处理对SAR系统分辨特性的影响。从该文的研究分析可以看出，由于分布目标信号具有的随机特性，在目标间距离小于传统的分辨率时也存在可分辨性，目标间距离大于系统分辨率时也存在不可分辨性。多视处理相当于增加了目标间的相关性，同样对SAR的分辨特性有较大的影响。该文提出的分辨特性评价指标将SAR系统特性与目标特性相结合，更能真实反映SAR的分辨性能，对SAR系统参数设计和评定有重要意义。
- SAR /
- 分布目标 /
- 可分辨概率 /
- 统计特性 /
- 多视处理
Abstract: A method is proposed to analyze and assess the SAR resolution, which considers the statistical characteristics of the distributed targets and the number of multi-look. The joint probability density function of two points on the amplitude radio, phase difference, correlation coefficient, and the number of multi-look is deduced from the SAR complex scattering echo signal. Based on the study of the SAR separable probability and the PDF, a mathematical model is built that reflects the mathematical relationship between the SAR resolution and the statistical properties of the targets and the number of multi-look. Considering the condition that the points can be separated, the influence that the statistical properties of SAR distributed targets and multi-look processing have on SAR resolution is discussed. From the numerical results, when the distance between targets is less than the traditional resolution, the targets also can be distinguished; and when the distance is larger than the traditional resolution, the targets may not be distinguished. The effect of multi-look processing is equivalent to increasing the relevance between the targets, and it also has great influence on SAR resolution. The separable probability can reflect the resolution performance correctly and is important for designing and evaluating the SAR system.
- SAR /
- Distributed targets /
- Resolution characteristics /
- Statistical properties /
- Multi-look processing

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参考文献(27)

LI Yong, ZHU Daiyin, and ZHU Zhaoda. Study on high resolution overlapped subaperture imaging algorithm for high squint airborne SAR processing[J]. Journal of Electronics Information Technology, 2006, 28(9): 1577-1581.

李勇, 日贷寅, 朱兆达. 机载合成孔径雷达大斜视高分辨率重叠子孔径成像算法研究. 电子与信息学报, 2006, 28(9): 1577-1581.

SUN Zhichao, WU Junjie, HUANG Yulin, et al. Performance analysis and mission design for inclined geosynchronous spaceborne-airborne bistatic SAR[C]. IEEE Radar Conference, Arlington, VA, USA, 2015: 1177-1181. doi: 10.1109/ RADAR.2015.7131172.

YANG Jian, YAMAGUCHI Yoshio, LEE Jongsen, et al. Application of polarimetric SAR[J]. Journal of Sensors, 2015, 2015: 1-2. doi: 10.1155/2015/316391.

AZMEDROUB B, OUARZEDDINE M, and SOUISSI B. Extraction of urban areas from polarimetric SAR imagery[J]. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2016, 9(6): 2583-2591. doi: 10.1109/JSTARS.2016.2527242.

XIN Kai and ZHU Lidong. Analysis and simulation of azimuth resolution for formation flying satellites SAR[C]. 2010 3rd International Conference on Advanced Computer Theory and Engineering, Chengdu, China, 2010, 2: 625-628. doi: 10.1109/ICACTE.2010.5579501.

ZHANG Rui, WEI Xizhang, and LI Xiang. The resolution of high resolution range profile for two ideal point targets[C]. IEEE International Conference on Information Science and Technology, Hubei, China, 2012: 397-400. doi: 10.1109/ ICIST.2012.6221676.

LU Xin and SUN Hong. Parameter assessment for SAR image quality evaluation system[C]. 2007 1st Asian and Pacific Conference on Synthetic Aperture Radar, Huangshan, China, 2007: 58-60. doi: 10.1109/APSAR.2007.4418554.

FREEDMAN Jerome. Resolution in radar systems[J]. Proceedings of the IRE, 1951, 39(7): 813-818. doi: 10.1109/ JRPROC.1951.273680.

SHOLNIK M. Radar Handbook[M]. New York: McGraw Hill, 1990, Chapter 21.4.

LAO Guochao, YE Wei, LI Guojing, et al. A quality evaluation method of SAR image based on grayscale image and electromagnetic scattering characteristics[C]. Eighth International Conference on Digital Image Processing, Chengdu, China, 2016: 100333S. doi: 10.1117/12.2244666.

BOS A V D and DEKKER A D. Coherent model-based optical resolution[J]. Journal of the Optical Society of America A, 1996, 13(8): 1667-1669.

MARTINEZ A and MARCHAND J L. SAR image assessment[J]. Asoc. Espanola de Teledeteccion Revista de Teledeteccion, 1993, 2: 12-18.

RIHACZEK A W. Radar resolution of ideal point scatterers[J]. IEEE Transactions on Aerospace and Electronic Systems, 1996, 32(2): 842-845. doi: 10.1109/7.489527.

王岩飞. 合成孔径雷达相干目标的分辨力评定[J]. 电子信息学报, 1996, 18(3): 230-235.

WANG Yanfei. The assessment of SAR resolution of coherent targets[J]. Journal of Electronics Information Technology, 1996, 18(3): 230-235.

TORRES L, SANTANNA S J S, da COSTA FREITAS C, et al. Speckle reduction in polarimetric SAR imagery with stochastic distances and nonlocal means[J]. Pattern Recognition, 2014, 47(1): 141-157. doi: 10.1016/j.patcog.2013. 04.001.

NIE X, QIAO H, and ZHANG B. A variational model for PolSAR data speckle reduction based on the Wishart distribution[J]. IEEE Transactions on Image Processing, 2015, 24(4): 1209-1222. doi: 10.1109/TIP.2015.2396292.

LI F K, CROFT C, and HELD D N. Comparison of several techniques to obtain multiple-look SAR imagery[J]. IEEE Transactions on Geoscience and Remote Sensing, 1983, GE-21(3): 370-375. doi: 10.1109/TGRS.1983.350568.

GOODMAN N R. Statistical analysis based on a certain complex Gaussian distribution (an introduction)[J]. Annals of Mathematical Statistics, 1963, 34(1): 152-177. doi: 10.1214 /aoms/1177704250.

邢艳肖, 张毅, 李宁, 等. 一种联合特征值信息的全极化SAR图像监督分类方法[J]. 雷达学报, 2016, 5(2): 217-227. doi: 10.12000/JR16019.

XING Yanxiao, ZHANG Yi, LI Ning, et al. Polarimetric SAR image supervised classification method integrating eigenvalues[J]. Journal of Radars, 2016, 5(2): 217-227. doi: 10.12000/JR16019.

崔浩贵, 刘涛, 蒋宇中, 等. 基于混合矩的极化SAR图像K分布模型参数估计新方法[J]. 电子与信息学报, 2015, 37(2): 328-333. doi: 10.11999/JEIT140551.

CUI Haogui, LIU Tao, JIANG Yuzhong, et al. Parameter estimation for the K-distribution in PolSAR imagery based on hybrid moments[J]. Journal of Electronics Information Technology, 2015, 37(2): 328-333. doi: 10.11999/JEIT 140551.

LEE J S, SCHULER D L, LANG R H, et al. K-distribution for multi-look processed polarimetric SAR imagery[C]. Geoscience and Remote Sensing Symposium, 1994. IGARSS '94, Pasadena, USA, 1994, 4: 2179-2181. doi: 10.1109/ IGARSS.1994.399685.

LEE J S, HOPPEL K W, MANGO S, et al. Intensity and phase statistics of multilook polarimetric and interferometric SAR imagery[J]. IEEE Transactions on Geoscience and Remote Sensing, 1994, 32(5): 1017-1028. doi: 10.1109/36. 312890.

LEE J S, MILLER A R, and HOPPEL K W. Statistics of phase difference and product magnitude of multi-look processed Gaussian signals[J]. Waves in Random Media, 1994, 4(4): 307-319. doi: 10.1088/0959-7174/4/3/006.

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