关键词: 合成孔径雷达（SAR）图像, 目标检测, 频域恒虚预警（CFAR）, 效能评估, 平均判决阀值（ADT）

Abstract: Aimed at the problem of lacking impersonal effectiveness evaluation of SAR target image detection, method is given utilizing ADT to evaluate detecting capability of CFAR method in frequency-domain. The simulation of three kinds of CFAR detectors in frequency-domain for heterogeneous area in SAR image has been realized by using MATLAB and evaluation of emulational effect has been made using ADT. It manifests the feasibility, veracity and availability, which sloves the automatic targets detection of SAR image based on CFAR method in frequency-domain.

Key words: Synthetic Aperture Radar（SAR） image, targets detection, frequency-domain Constant False Alarm Rate（CFAR）, performance evaluation, Average Decided Threshold（ADT）