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<p>@Troy: Care to spare some links ?</p>
<p>And your math is almost the same: (A || B) <= 1 ? screen : lighten; The only thing is that values above one will get the max value of A or B, depending on which is the greatest. </p>
<p>Also here I'm not dealing with 32-bit floats, I'm trying to find a better way to handle Hue, Sat, Val and Col blend operations to not use RGB <-> HSV conversions which are flawed by design and produce artfacts.</p>
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<p>Le 2014-06-08 00:56, Troy Sobotka a écrit :</p>
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<p dir="ltr"><br /> On Jun 7, 2014 3:20 AM, "Bartek Skorupa (priv)" <<a href="mailto:bartekskorupa@bartekskorupa.com">bartekskorupa@bartekskorupa.com</a>> wrote:<br /> ><br /> > The way I see it:<br /> > Math is the same, but color spaces are different, so we come up with different results.</p>
<p dir="ltr">The math is frequently different.</p>
<p dir="ltr">Screen for example in scene referred models is typically:<br /> A or B <= 1.0 A+B-AB ? max(A,B)</p>
<p dir="ltr">max() is often used in place of display referred 1.0 contexts. IIRC, there are a few HDR tools that use whatever the chosen white point value in scene referred is.</p>
<p dir="ltr">There is a good amount of forum chatter on this subject at some of the Nuke and other such forums.</p>
<p dir="ltr">With respect,<br /> TJS</p>
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