I think it's not so bad with my last script (even if I know that it's hard to see differences with static images, but I persist to say that I can see them with movement in videos)
https://media.joomeo.com/original/5ad3dedddbcce.png
Video to compare : https://www.youtube.com/watch?v=51iwiDlcQKk
https://media.joomeo.com/original/5ad3df1c6069e.png
Video to compare : https://www.youtube.com/watch?v=YXW6OOGxC-k
But it will never be like in the old days, it's clear !