An ATR algorithm finds target like regions (regions-of-interest (ROIs)) within a SAR image and computes a class for each ROI. The meaning of SAR ATR is explained, and the general architecture of SAR ATR system is introduced in this paper.

• SAR ATR过程可概述为:从观测得到的SAR图象中；找到感兴趣的区域(ROI)；并计算出每个ROI的种类.