分时型偏振成像探测系统开发与应用(特邀)

Development and Application of Time-sharing Polarization Imaging Detection System(Invited)

在恶劣天气条件下,环境中的散射颗粒造成成像设备获得的图像严重退化,使图像的应用价值大为降低。偏振成像技术在获取目标物体强度信息的同时能获取物体的多维度偏振信息,通过对这些多维度信息复原,可以提高图像细节和可视度。开发了电机带动齿轮传动对偏振片旋转的分时型偏振成像系统,在上位机控制偏振片旋转角度,实现任意波段偏振图像的获取,并利用偏振成像算法获得去散射图,由于偏振成像算法处理后造成重构图像中不同位置景物有明显的明暗差异,又通过自适应图像增强算法重建被过度处理的图像部分区域,使图像的整体对比度均衡,能提供更多的细节信息能力,具有重要的实际应用价值。

In severe weather conditions,the scattering particles in the environment can significantly degrade of the image obtained by imaging equipments,which reduces the application value of the image greatly.Polarization imaging technology can obtain the multi-dimensional polarization information of the object as well as the intensity information of the object.By restoring this multi-dimensional information,the image details and visibility can be im-proved.A time-sharing polarization imaging system is developed in which the polarizer is rotated by a gear driven by a motor.The upper computer controls the rotation angle of the polarizer to obtain the polarization image of any wave band.At the same time,the obtained images are processed by using the polarization imaging algorithm,Since the polarization imaging algorithm causes obvious difference of light and shade in different positions of the recon-structed image,the adaptive image enhancement algorithm is used to reconstruct part of the overprocessed image,so that the overall contrast of the image is balanced,and it can provide more detailed information ability,which has important practical application value.