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VITA-Group / EnlightenGAN

[IEEE TIP] "EnlightenGAN: Deep Light Enhancement without Paired Supervision" by Yifan Jiang, Xinyu Gong, Ding Liu, Yu Cheng, Chen Fang, Xiaohui Shen, Jianchao Yang, Pan Zhou, Zhangyang Wang
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Grayscale Attention Map Calculation #54

Closed DomhnallBoyle closed 4 years ago

DomhnallBoyle commented 4 years ago

Is this the code used to generate the grayscale attention map?

r,g,b = input_img[0]+1, input_img[1]+1, input_img[2]+1
A_gray = 1. - (0.299*r+0.587*g+0.114*b)/2.

Where was this formula derived from? It looks like some weighted/luminance based method

Thanks

yifanjiang19 commented 4 years ago

Yes and you can refer to this link: https://en.wikipedia.org/wiki/Grayscale