Hi All,
I spend last week a morning with the most famous Photoshop expert in France.
He is reluctant to work in 16 bits mode as he thing it don't matter that much and differences are not visible, an opinion I don't share and which is mot the subject matter, but I report here nevertheless.
He shown me the following that you can experiment by your own:
Open a picture, go to Image>Adustment>Posterize, this feature set the grey levels of a photography contains by channel.
Begin to 0 select the number and navigate with the mouse wheel (for those who don't use a graphic palette). You, and I at least, will not see any difference with the original file when reaching 128 levels. According to Bruce Frazer, the explanation is an human eye can't differentiate more than 128 levels of grey, a 8 bit contain 256 levels and a 16 bit contains 65 536 levels.
I wonder how some of you can see the differences you are talking about for some times now.
Have Brits over-accurate eyes?
Cheers.
Fernand Ivaldi
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