CAJ | 학술논문

增强成像方法将待检测目标的先验知识引入到成像过程中对其进行增强,有助于提高图像的直观性和改善后续检测效果.旋转体目标具有散射特性的方位不变性,而大多数人造和自然杂波不具备该特点,因此可利用方位散射不变性对旋转体目标进行增强成像.该文首先提出了方位散射熵的概念以度量目标不同方位向散射特性的一致性,在此基础上提出了基于方位散射熵的旋转体目标增强成像算法,最后针对实际机载 SAR 应用中存在的位置和姿态误差给出了结合运动误差补偿的方位散射熵的计算方法.实测数据结果证明了该文所提方法的有效性和实用性.
증강성상방법장대검측목표적선험지식인입도성상과정중대기진행증강,유조우제고도상적직관성화개선후속검측효과.선전체목표구유산사특성적방위불변성,이대다수인조화자연잡파불구비해특점,인차가이용방위산사불변성대선전체목표진행증강성상.해문수선제출료방위산사적적개념이도량목표불동방위향산사특성적일치성,재차기출상제출료기우방위산사적적선전체목표증강성상산법,최후침대실제궤재 SAR 응용중존재적위치화자태오차급출료결합운동오차보상적방위산사적적계산방법.실측수거결과증명료해문소제방법적유효성화실용성.
@@@@By applying the prior knowledge of targets to be detected, enhanced imaging for the targets can be realized and beneficial improvements in image quality and detection performance can be expected. Body Of Revolution (BOR) has the unique feature of aspect scattering invariance, which can be used for the classification of BOR targets. In this paper, Aspect Scattering Entropy (ASE) is introduced to measure the aspect invariance of target scattering. Then the enhanced imaging algorithm based on ASE is proposed to emphasize BOR targets. Afterwards, the effect of fluctuant location and attitude on enhanced imaging is analyzed, and compensation method is integrated with aspect scattering feature extraction. The results of experimental data demonstrate the effectiveness and practicability of the proposed algorithm.