illumination value的意思|示意

Since illumination condition effects recognition ratio for human face greatly, while average gray value of every face image is different, we must standardize gray value of face images.

由于人脸识别率受照明条件的影响较大，而各个人脸图像的平均灰度值各不相同，所以必须对人脸图像进行灰度归一化。

The first and second detected light levels are processed to derive a first value representing the ambient light level and a second value representing the illumination source output level.

对于第一和第二检测出的光照水平进行处理，得出表示环境光照水平的第一值和表示照明源输出水平的第二值。