基于幾何校正的聚束SAR快速分級(jí)后投影算法

左紹山; 楊澤民; 孫光才; 邢孟道

doi:10.11999/JEIT141254

基于幾何校正的聚束SAR快速分級(jí)后投影算法

doi: 10.11999/JEIT141254

基金項(xiàng)目:

國(guó)家自然科學(xué)青年基金(61301292)和教育部博士點(diǎn)基金(20130203120007)資助課題

計(jì)量
- 文章訪問數(shù): 1729
- HTML全文瀏覽量: 164
- PDF下載量: 547
- 被引次數(shù): 0
出版歷程
- 收稿日期: 2014-09-26
- 修回日期: 2015-02-09
- 刊出日期: 2015-06-19

Geometric Correction Based Fast Factorized Back Projection Algorithm for Spotlight SAR Imaging

摘要

摘要: 快速分級(jí)后投影(Fast Factorized Back Projection, FFBP)算法大幅減少了原始后投影算法的插值次數(shù)，提升運(yùn)算效率。然而圖像合成過程中仍然需要大量的圖像域2維插值操作，龐大的計(jì)算量限制了其在實(shí)際中的應(yīng)用。該文提出一種基于幾何校正的聚束SAR快速分級(jí)后投影算法。該算法利用幾何校正的方法實(shí)現(xiàn)子圖像配準(zhǔn)，即在滿足聚焦性能的前提下，通過距離維平移和角度維旋轉(zhuǎn)完成子圖像在不同坐標(biāo)系下的投影和子圖像合成。該算法避免了逐點(diǎn)插值運(yùn)算，進(jìn)一步降低了FFBP算法的計(jì)算量。仿真結(jié)果表明，該算法能高精度聚焦成像，并且其運(yùn)算效率相對(duì)于基于圖像域2維插值的FFBP算法顯著提高。
- SAR /
- 聚束 /
- 快速分級(jí)后投影 /
- 幾何校正 /
- 逐點(diǎn)插值
Abstract: Compared with the Back Projection Algorithm (BPA), the interpolation load of the Fast Factorized Back Projection Algorithm (FFBPA) is released. However, the 2D interpolation in the image domain is essential for the FFBPA and the intensive computational burden limits its application in practice. This paper presents the geometric correction based FFBPA for the spotlight SAR imaging. In this algorithm, the sub-image registration is accomplished by the geometric correction method that the sub-image projection in the different coordinate systems and sub-image fusion are fulfilled by the shift in the range dimension and the rotation in the angle dimension. Thus the method avoids the individual interpolation and it is more efficient than the FFBPA. Simulation results validate its imaging performance and efficiency.
- SAR /
- Spotlight /
- Fast Factorized Back Projection Algorithm (FFBPA) /
- Geometric correction /
- Individual interpolation

HTML全文

參考文獻(xiàn)(25)

保錚, 邢孟道, 王彤. 雷達(dá)成像技術(shù)[M]. 北京: 電子工業(yè)出版社, 2005: 2-6.

Cumming I G and Wong F H. Digital Processing of Synthetic Aperture Radar Data: Algorithms and Implementation[M]. Norwood, MA: Artech House, 2005: 308-319.

楊澤民, 孫光才, 吳玉峰, 等. 一種新的基于極坐標(biāo)格式的快速后向投影算法[J]. 電子與信息學(xué)報(bào), 2014, 36(3): 537-544.

Yang Ze-min, Sun Guang-cai, Wu Yu-feng, et al.. A new fast back projection algorithm based on polar format algorithm [J]. Journal of Electronics Information Technology, 2014, 36(3): 537-544.

Ozsoy S and Ergin A. A pencil back projection method for SAR imaging[J]. IEEE Transactions on Image Processing, 2009, 18(3): 573-581.

Scudder H J. Introduction to computer aided tomography[J]. Proceedings of the IEEE, 1978, 66(6): 628-637.

Munson D C, Jr OBrien J D, and Jenkins W K. A tomographic formulation of spotlight mode synthetic aperture radar[J]. Proceedings of the IEEE, 1983, 71(8): 917-925.

Desai M D and Jenkins W K. Convolution back-projection image reconstruction for spotlight mode synthetic aperture radar[J]. IEEE Transactions on Image Processing, 1992, 1(4): 505-516.

Wang Yi-duo, Xi Ping, and Xue Wei. Fast filter back projection algorithm based on hexagonal grid[C]. International Conference on Electrical and Control Engineering, Wuhan, China, 2010: 964-969.

Xiao S, Munson D C Jr, and Basu S. An N2logN back- projection algorithm for SAR image formation[C]. Conference Record of the Thirty-Fourth Asilomar Conference on Signals Systems and Computers, Pacific Grove, CA, USA, 2000, 1: 3-7.

Yegulalp A F. Fast back-projection algorithm for synthetic aperture radar[C]. The Record of the 1999 IEEE Radar Conference, Waltham, MA, USA, 1999: 60-65.

陳思, 趙惠昌, 張淑寧, 等. 基于dechirp彈載SAR的改進(jìn)后向投影算法[J]. 物理學(xué)報(bào), 2013, 62(21): 1-9.

Chen Si, Zhao Hui-chang, Zhang Shu-ning, et al.. An improved back projection imaging algorithm for dechirped missile-borne SAR[J]. Acta Physica Sinica, 2013, 62(21): 1-9.

Durand R, Ginolhac G, and Thirion-Lefevre L. Back projection version of subspace detector SAR processors[J]. IEEE Transactions on Aerospace and Electronic Systems, 2011, 47(2): 1489-1497.

龐礴, 代大海, 邢世其, 等. SAR層析成像技術(shù)的發(fā)展和展望[J]. 系統(tǒng)工程與電子技術(shù), 2013, 35(7): 1421-1429.

Pang Bo, Dai Da-hai, Xing Shi-qi, et al.. Development and perspective of tomographic SAR imaging technique[J]. Systems Engineering and Electronics, 2013, 35(7): 1421-1429.

張文彬, 鄧云凱, 王宇, 等. 星地雙基合成孔徑雷達(dá)聚束模式快速BP算法[J]. 雷達(dá)學(xué)報(bào), 2013, 2(3): 357-366.

Zhang Wen-bin, Deng Yun-kai, Wang Yu, et al.. A fast backprojection algorithm for spotlight mode Bi-SAR imaging [J]. Journal of Radars, 2013, 2(3): 357-366.

Vu V T, Sjogren T K, and Pettersson M I. SAR imaging in ground plane using fast backprojection for mono-and bistatic cases[C]. 2012 IEEE Radar Conference, Atlanta, USA, 2012: 184-189.

Zhang Lei, Li Hao-lin, and Qiao Zhi-jun. A fast BP algorithm with wavenumber spectrum fusion for high-resolution spotlight SAR imaging[J]. IEEE Geoscience and Remote Sensing Letters, 2014, 11(9): 1460-1464.

高陽, 禹衛(wèi)東, 馮錦, 等. 一種基于勒讓德擬合的SAR后向投影自聚焦算法[J]. 雷達(dá)學(xué)報(bào), 2014, 3(2): 176-182.

Gao Yang, Yu Wei-dong, Feng Jin, et al.. A SAR back projection autofocusing algorithm based on Legendre approximation[J]. Journal of Radars, 2014, 3(2): 176-182.

張磊, 李浩林, 邢孟道, 等. 快速后向投影合成孔徑雷達(dá)成像的自聚焦方法[J]. 西安電子科技大學(xué)學(xué)報(bào)(自然科學(xué)版), 2014, 41(1): 69-74.

Zhang Lei, Li Hao-lin, Xing Meng-dao, et al.. Autofocusing the synthetic aperture radar imagery by the fast back- projection algorithm[J]. Journal of Xidian University(Natural Science), 2014, 41(1): 69-74.

Ulander L M H, Hellsten H, and Stenstrom G. Synthetic- aperture radar processing using fast factorized back- projection[J]. IEEE Transactions on Aerospace Electronic Systems, 2003, 39(3): 760-776.

相關(guān)文章

施引文獻(xiàn)

資源附件(0)

訪問統(tǒng)計(jì)