luminance difference meaning in English

辉度差
亮度差异
亮度衬比
亮度对比

Critical luminance difference
临界亮度差
With the color and luminance difference of wheat field and outside the field , the position of field edge and the candidate points of it could be detected ; the slope of the field - edge was calculated by using passing a known point hough transform
根据麦田和田外区域的不同颜色及亮度特征，判断出田埂的位置以及田埂线的方向候补点群，使用过已知点的哈夫变换计算出田埂线的斜率。
The longitudinal distortion , lateral displacement and luminance difference of the reconstructed images at different depth of field in multiple - exposure rainbow holography for 3 - d synthesis of multiple ct slides were analyzed , for which the effective compensation methods were presented , and the experimental results were given
分析了应用彩虹全息术实现ct图片的立体合成过程中再现像在轴向及垂轴方向上的畸变以及再现像亮度的失真,分别提出了相应的补偿方法，并给出了相应的实验结果