第三讲感光材料照相性能的计算法从绘出的特性曲线中,可以计算出感光材料的照相性能,以便正确的控制和使用它。现分述如下: 一、反差和反差系数反差和反差系数这是两个不同的概念,往往容易被混淆。人眼所看到的景物中最亮的部分与最暗的部分它们的对数差,称为景 Lecture 3: Calculation method of photographic performance of photosensitive material From the characteristic curve drawn, the photographic performance of photographic material can be calculated so that it can be correctly controlled and used. Here are the points are as follows: First, the contrast and contrast coefficient contrast and contrast coefficient This is two different concepts, often easily confused. The eye of the scene to see the brightest part and the darkest part of their logarithmic difference, known as King