luminance difference threshold

例句：

1. 1.The luminance difference threshold is a critical factor in determining the brightness of an image.
   光亮度差异阈值是决定图像亮度的关键因素。
2. 2. The researcher found that the luminance difference threshold had a significant impact on the perception of color.
   研究者发现，光亮度差异阈值对色彩感知有显著影响。
3. 3. The luminance difference threshold is used to measure the amount of light that reaches the human eye.
   光亮度差异阈值用于测量到达人类眼睛的光量。