1.  gamma
2.  contrast gradient

• 1. 反差系数: contrast coefficient | Gamma | contrast factor | contrast coefficent, gamma
• 2. 时间–反差系数曲线: time gamma curve
• 3. 总反差系数: total contrast coefficient

更多释义

• 1.在感光测定中，一般都用图解的方法从感光特性曲线上求出感光度、反差系数等特性数值。
  In sensitometry, the characteristic values of sensitivity and contrast coefficient are generally, obtained from photographic characteristic curve graphically.
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