基于改进Hough变换的海面微弱目标检测

Small-target Detection in Sea Clutter Based on Improved Hough Transform

海杂波背景下的微弱目标检测是一个具有挑战性的难题。该文提出一种应用改进Hough变换检测海面微弱目标的方法。对海面的距离-时间像进行时间向二次采样,并平滑得到的子图,对平滑图应用边缘检测然后进行Hough变换,在Hough域通过两级门限检测出微弱目标。该方法不依赖海杂波模型,具有通用性,可以在没有海面先验信息的情况下检测微弱目标。实测海杂波数据的处理结果验证了该方法的正确性和实用性。

Small target detection in sea clutter is a challenging problem.This paper proposes a novel approach to solve it.Edge detection and improved Hough transform are applied to a set of range profiles,which are resulted from re-sampling and smoothing the range-time profiles in time direction.Using the two-step masks,the moving small target can be figured out in Hough domain.This approach has a wide application due to the independence on the model of sea clutter,and can be used to detect target without prior knowledge of the ocean and environment conditions.Real sea clutter data is used to illustrate the effectiveness and the practicability of the novel approach.