光电工程
光電工程
광전공정
OPTO-ELECTRONIC ENGINEERING
2014年
4期
9-14
,共6页
目标尺度%小目标检测%自适应尺度%拉普拉斯尺度空间
目標呎度%小目標檢測%自適應呎度%拉普拉斯呎度空間
목표척도%소목표검측%자괄응척도%랍보랍사척도공간
target scale%small target detection%adaptive scale%Laplacian scale space
传统的光电成像跟踪系统中,通常采用固定尺度的滤波器对图像中的小目标进行检测。由于目标与系统距离的改变,通常会带来其成像特征尤其是大小的不断变化,这种特点导致传统的固定尺度检测器难以适应目标大小的改变,无法获得最优的提取结果。针对这一问题,提出了一种尺度自适应的小目标检测方法。基于拉普拉斯尺度空间理论,利用对尺度归一化的拉普拉斯图像的分析,达到了目标信号增强的同时抑制背景杂波的效果,分别在空间与尺度上求得了最优的目标特征参数,完成了对不同尺度最优的小目标检测。通过仿真与外场试验表明,该方法显著提高了系统对小目标尤其是大小不断变化目标的检测能力。
傳統的光電成像跟蹤繫統中,通常採用固定呎度的濾波器對圖像中的小目標進行檢測。由于目標與繫統距離的改變,通常會帶來其成像特徵尤其是大小的不斷變化,這種特點導緻傳統的固定呎度檢測器難以適應目標大小的改變,無法穫得最優的提取結果。針對這一問題,提齣瞭一種呎度自適應的小目標檢測方法。基于拉普拉斯呎度空間理論,利用對呎度歸一化的拉普拉斯圖像的分析,達到瞭目標信號增彊的同時抑製揹景雜波的效果,分彆在空間與呎度上求得瞭最優的目標特徵參數,完成瞭對不同呎度最優的小目標檢測。通過倣真與外場試驗錶明,該方法顯著提高瞭繫統對小目標尤其是大小不斷變化目標的檢測能力。
전통적광전성상근종계통중,통상채용고정척도적려파기대도상중적소목표진행검측。유우목표여계통거리적개변,통상회대래기성상특정우기시대소적불단변화,저충특점도치전통적고정척도검측기난이괄응목표대소적개변,무법획득최우적제취결과。침대저일문제,제출료일충척도자괄응적소목표검측방법。기우랍보랍사척도공간이론,이용대척도귀일화적랍보랍사도상적분석,체도료목표신호증강적동시억제배경잡파적효과,분별재공간여척도상구득료최우적목표특정삼수,완성료대불동척도최우적소목표검측。통과방진여외장시험표명,해방법현저제고료계통대소목표우기시대소불단변화목표적검측능력。
In the traditional photoelectric tracking system, the fixed scale filter is usually used for target detection. The target features especially the target size is changing all the time due to the distance change between the target and tracking system. It results in the filter not suitable for the target size changing, and it is difficult for the system to obtain the best extraction results. For this question, a small target detection method based on adaptive scale is proposed. Based on the Laplacian scale-space theory, the normalized Laplacian scale-space images are studied, the target signal is enhanced and the noise is suppressed at the same time. By finding the best parameter of target both in the scale and space, the small targets with different scale could be detected effectively. The simulation test and the experimental results show that the method proposed improved the detection capability of the system for small target with different size remarkably.