穿墙雷达中的一种多层墙体强度补偿方法

摘要

For through-wall-radar imaging of building layout,the intensity difference of multi-layer wall images caused by wall propagation attenuation makes it impossible to express the building layout accurately. This paper presents a method to compensate the intensity difference.First,back proj ected algorithm is ap-plied to form an original image,then an image enhancement method based on PCA and fuzzy logic analysis is used to preprocess the image.Second,the target region and the non-target region are separated by a fixed threshold which is achieved by Hough transform.Then,the existed data connected domains are confirmed. Finally,the compensation rates of these domains are obtained and the intensity compensation is performed. The experiment results validate the proposed method.%在穿墙雷达建筑布局成像中，由墙体对电磁波信号的衰减而引起多层墙体成像强度的非均匀现象，这为建筑布局的重构带来极大的不便。对此提出一种基于霍夫变换门限检测的多层墙体衰减补偿方法。首先，对实测数据采用后向投影成像算法，并用基于主成份分析和模糊逻辑图像增强方法处理，形成原始图像。其次，基于霍夫变换直线检测原理完成固定门限值的选取，并依此判决和划分目标墙体区域和非目标杂波区域。再次，根据门限判决后的数据连通域的特性，获得目标墙体连通域的强度补偿率并完成多层墙体衰减补偿。实测数据的处理验证了基于霍夫变换门限检测的多层墙体成像强度衰减补偿方法的有效性。