Optimizing CFAR-based SAR Target Detection Algorithm for DSP Platform

In this paper, the CFAR detection algorithm is improved, and proposed an improved two parameter CFAR detection algorithm. The improved two parameter CFAR detector delivered in this paper only uses a target window and a background window, By using special methods to remove the leaked ship pixels in the background window and estimate the remaining pixels in the background window which are sea clutter to get the local window's clutter gray mean and variance. The moving step is the same as the length of the target window. Compared with two parameter CFAR detector, the structure is simplified and the detection result's false alarms is less, targets too close can also be detected, furthermore, the computing efficiency is improved. The simulation results prove the algorithm's effectiveness. And the practicability of the algorithm is verified by DSP.

[1]  Gangyao Kuang,et al.  An Adaptive and Fast CFAR Algorithm Based on Automatic Censoring for Target Detection in High-Resolution SAR Images , 2009, IEEE Transactions on Geoscience and Remote Sensing.

[2]  Christoph H. Gierull,et al.  Ship detection with spaceborne multi-channel SAR/GMTI radars , 2012 .

[3]  S. Quegan,et al.  Understanding Synthetic Aperture Radar Images , 1998 .

[4]  Juan Wang,et al.  Study on Ship Target Detection and Recognition in SAR imagery , 2009, 2009 First International Conference on Information Science and Engineering.

[5]  Ping Zhou,et al.  Man-made target detection in SAR imagery , 2005, Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05..

[6]  YU Wen-xian.  A Modified Method of Extracting SAR Target Scattering Center Features from Imagery Domain , 2004 .

[7]  Lin Xu,et al.  New CFAR Ship Detection Algorithm based on Adaptive Background Clutter Model in Wide Swath SAR Images , 2014 .

[8]  Ai Jia.  A new CFAR ship detection algorithm based on independent joint K-distribution , 2010 .

[9]  Lance Kaplan,et al.  Improved SAR target detection via extended fractal features , 2001 .

[10]  Zou Huanxin,et al.  A fast ship detection algorithm in SAR imagery for wide area ocean surveillance , 2012, 2012 IEEE Radar Conference.

[11]  Zhang Jun,et al.  Comparison on Two CFAR Algorithms of Vehicle Target Detection in SAR Images , 2008 .

[12]  禹卫东,et al.  A New CFAR Ship Detection Algorithm Based on 2-D Joint Log-Normal Distribution in SAR Images , 2010 .

[13]  S. Ayasli,et al.  Coherent spatial filtering for SAR detection of stationary targets , 1999 .