【摘要】 本文研究用面阵感光器件CCD/CMOS分光谱通道成像远距离物体,利用大气及其悬浮物的瑞利散射及其在成像过程中的前向干扰信息测量大气悬浮颗粒物浓度和粒径分布。大气颗粒物造成远景物体模糊,边缘和物体图像的高频成份衰退,改变了图像像素的频谱分布;气溶胶造成自然光散射增强了前景亮度。通过测定图像中物体高频成分损失或频谱改变量,以及测定图像中空气的亮度值两种方法,结合日高等参数确定颗粒物浓度。利用R、G、B及IR通道测定值,可确定悬浮物粒径分布情况。读出数字图像成像参数,可直接利用拍摄焦距、物高、像高等数字值确定照片上的物体距离。更多还原

【Abstract】 This paper studies how to measure the aerosol floating in atmosphere and its size distribution with CCD or CMOS device imaging object at a long-distance,at multi-spectrum channels in vision and Infrared.The Rayleigh scattering by the aerosol causes the image mistiness,similar to out of focus.So that it introduces the high frequency drop in object and its edge on the photos,and its changes of the spectrum distribution.Its changes test is for the aerosol concentration.And it also increases to the foreground brightness,that sunlight at scattering by the aerosol.It can be used to detect that one,by measuring photo bright value with other parameters such as sun angle.It can detect the distribution of aerosol-size by R,G,B and IR channels.It also determines the distance between the lens and object.The digital parameters are from file’s head directly.更多还原