light value meaning in English

(明暗层次中)亮的层次
测光值
光阀
光量值
亮调子

Each line must contain several hundred individually identifiable halftone light values .
每一条线必须包括几百个各自认得出的用网屏表示的光度值。
If i do i will end up with a white reflection on a light value , no pop
如果这样，就要用白色来代表反射光线值，这并不流行！
In this paper , firstly , the main methods of irnaging underwater and underwatr optical imaging development history are being introduced . coilsboction , principle and working circumstance of swg - l are noted . the optical properties of sea water are described , the effect to underwater imaging is analyzed . there are two parameters in evalvating tmderwater driaging quality : underwater contrast and optical tranfe fimction . underwater light source shoud be pay more attention . estimate and measurement of underwater light value are given at the sea depth where the system working
然后对水的光学特性及其对水下成像的影响进行了理论分析，介绍了水下图象质量评价的两个参数即水中对比度和光学传递函数；对预期拍摄深度的海中照度进行了理论估算与实际测量；讨论了水下目标辅助照明时应注意的问题。