CAJ | 학술논문

低对比度目标探测在司法取证、反恐维安、远距离监控、搜救等应用中具有重要意义，然而传统二维成像方法则难以对其有效探测。由此，提出了基于2D/3D距离选通成像探测低对比度目标的方法：通过2D距离选通成像直接获取目标无背景或背景部分滤除的二维选通图像，从而突显目标，简化目标提取图像处理；当复杂背景无法有效滤除时，可进一步通过3D距离选通成像重建二维选通图像中丢失的三维空间信息，通过距离图区分目标与背景，实现目标有效探测。在该方法中，3D距离选通成像是基于上述二维选通图像采用超分辨率三维成像反演实现的，因此无需耗时获取新数据，从而提高了实时性，并压缩了数据量。研究和实验表明：该方法可有效解决低对比度目标探测问题，在低照度及恶劣天气环境下均可有效工作。
저대비도목표탐측재사법취증、반공유안、원거리감공、수구등응용중구유중요의의，연이전통이유성상방법칙난이대기유효탐측。유차，제출료기우2D/3D거리선통성상탐측저대비도목표적방법：통과2D거리선통성상직접획취목표무배경혹배경부분려제적이유선통도상，종이돌현목표，간화목표제취도상처리；당복잡배경무법유효려제시，가진일보통과3D거리선통성상중건이유선통도상중주실적삼유공간신식，통과거리도구분목표여배경，실현목표유효탐측。재해방법중，3D거리선통성상시기우상술이유선통도상채용초분변솔삼유성상반연실현적，인차무수모시획취신수거，종이제고료실시성，병압축료수거량。연구화실험표명：해방법가유효해결저대비도목표탐측문제，재저조도급악렬천기배경하균가유효공작。
Low contrast target detection is important in the applications of evidence gathering, protection from terrorists, remote surveillance, search and rescue, but it is difficult to detect by traditional imaging techniques. 2D/3D range-gated imaging(RGI) was proposed to detect low contrast targets. In our method, 2D range-gated imaging can output two-dimensional gate images of targets with background filtered or partly filtered to silhouette targets and simplify image processing of target extraction. If background is complex in gate images, 3D range-gated imaging can further reconstruct the spatial depth information collapsed in two-dimensional gate images, and then target can be easily distinguished from background by the depth map of target in a scene. Note that 3DRGI is realized by supperresolution depth mapping only based on the data of 2DRGI and there is no need to take time to get new data like depth scanning. Therefore, real-time performance is improved, and data volume is also reduced. Our research and experiments demonstrate that 2D/3D range-gated imaging is effective for low contrast target detection, even under low light or bad weather conditions.