visibility distance

Light signal visibility test back focal distance

灯光信号显示距离测试

Atmospheric attenuation of scene contrast is studied theoretically on the basis of radiometric principles, and the relationships between the measured maximal detection range for a target and visibility distance under two possible conditions are obtained.

根据辐射度学原理，从理论上研究景物对比度在大气传输中的衰减，得到了在两种可能的条件下所测得的目标最大探测距离与能见距离的关系。

Poor visibility to satellites may cause the calculated position around, increasing the apparent traveled distance.

较差收星信号可能引起计算位置的游离, 从而增加了显示的旅行距离.

This method include 3 D Euclidean distance transform, computer the Hessian matrix in every voxel, and visibility test.

主要步骤包括:三维欧几里德距离变换, 求Hessian矩阵, 可视化检测几个步骤.