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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

左紹山, 楊澤民, 孫光才, 邢孟道. 基于幾何校正的聚束SAR快速分級(jí)后投影算法[J]. 電子與信息學(xué)報(bào), 2015, 37(6): 1389-1394. doi: 10.11999/JEIT141254
引用本文: 左紹山, 楊澤民, 孫光才, 邢孟道. 基于幾何校正的聚束SAR快速分級(jí)后投影算法[J]. 電子與信息學(xué)報(bào), 2015, 37(6): 1389-1394. doi: 10.11999/JEIT141254
Zuo Shao-shan, Yang Ze-min, Sun Guang-cai, Xing Meng-dao. Geometric Correction Based Fast Factorized Back Projection Algorithm for Spotlight SAR Imaging[J]. Journal of Electronics & Information Technology, 2015, 37(6): 1389-1394. doi: 10.11999/JEIT141254
Citation: Zuo Shao-shan, Yang Ze-min, Sun Guang-cai, Xing Meng-dao. Geometric Correction Based Fast Factorized Back Projection Algorithm for Spotlight SAR Imaging[J]. Journal of Electronics & Information Technology, 2015, 37(6): 1389-1394. 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

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

  • 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。
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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

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