光学学报, 2019, 39 (7): 0728010, 网络出版: 2019-07-16
扫描探测系统多尺度舰船目标的空间特性分析 下载: 792次
Spatial Characteristics Analysis of Multi-Scale Ship Target in Scanning Detection System
传感器 光学遥感 系统仿真 相机模型 图像多分辨率 舰船目标 sensors optical remote sensing system simulation camera model image multi-resolution ship target
摘要
基于相机模型,建立多分辨率下的成像链路仿真,对不同尺度和采样体制下的舰船目标结构和方向特征进行分析。结果表明:对于长度在百米级的舰船,当空间分辨率高于12 m时,形状和方向特性能够保持稳定;当空间分辨率低于12 m时,随着分辨率下降,很难通过单帧图像信息来识别目标类型和判断目标的方向;与单采样相比,过采样虽然能够提高图像的空间分辨率,但目标边缘的扩散更明显,不利于目标形状特征的提取;对于具有对称结构的舰船目标,两种采样体制对运动目标方向的捕捉和判断能力相当。
Abstract
This study presents an imaging chain simulation based on the camera model under multi-resolution conditions. The structure and directional characteristics of ship target are analyzed under different scales and sampling systems. For a 100-m-long boat, the shape and directional characteristics are stable when the image spatial resolution is >12 m. When the spatial resolution is <12 m, as resolution decreases, identifying the target type and obtaining the target direction using single-frame information become difficult. Compared with single sampling, oversampling can improve the spatial resolution of the image; however, diffusion of the target edge becomes more evident, which degrades the extraction of the target shape characteristics. For a ship target with symmetrical structure, these two sampling systems can equally capture and determine a moving target’s direction.
宋文韬, 胡勇, 巩彩兰, 匡定波. 扫描探测系统多尺度舰船目标的空间特性分析[J]. 光学学报, 2019, 39(7): 0728010. Wentao Song, Yong Hu, Cailan Gong, Dingbo Kuang. Spatial Characteristics Analysis of Multi-Scale Ship Target in Scanning Detection System[J]. Acta Optica Sinica, 2019, 39(7): 0728010.