dmstraker Posted February 9, 2020 Share Posted February 9, 2020 Duplicate layer and set top blend mode to Contrast Negate. The result looks suspiciously like a straight invert. I've tried this on 1.7.1 and 1.7.3, same result. See also here (is contrast negate as decribed?) Quote Dave Straker Cameras: Sony A7R2, RX100V Computers: Win10: Chillblast i9 Custom + Philips 40in 4K & Benq 23in; Surface Pro 4 i5; iPad Pro 11" Favourite word: Aha. For me and for others. Link to comment Share on other sites More sharing options...
Staff Gabe Posted February 17, 2020 Staff Share Posted February 17, 2020 Hi @dmstraker, On 2/9/2020 at 10:38 AM, dmstraker said: Duplicate layer and set top blend mode to Contrast Negate. The result looks suspiciously like a straight invert. Why do you think this should look different? It works on the luminance of the beneath layer/s. Just like @jenk has explained it here, in one of your other posts about this Quote Link to comment Share on other sites More sharing options...
dmstraker Posted February 18, 2020 Author Share Posted February 18, 2020 Apologies -- forgotten this -- recent confusion came about from another conversation. Will revisit previous postings. Quote Dave Straker Cameras: Sony A7R2, RX100V Computers: Win10: Chillblast i9 Custom + Philips 40in 4K & Benq 23in; Surface Pro 4 i5; iPad Pro 11" Favourite word: Aha. For me and for others. Link to comment Share on other sites More sharing options...
dmstraker Posted February 18, 2020 Author Share Posted February 18, 2020 A part of the puzzle is how overall luminosity is calculated -- seems possible that it is 0.3*Red + 0.59*Green + 0.11*Blue. True? Universally? Quote Dave Straker Cameras: Sony A7R2, RX100V Computers: Win10: Chillblast i9 Custom + Philips 40in 4K & Benq 23in; Surface Pro 4 i5; iPad Pro 11" Favourite word: Aha. For me and for others. Link to comment Share on other sites More sharing options...
Staff Gabe Posted February 18, 2020 Staff Share Posted February 18, 2020 Yep. That's correct dmstraker 1 Quote Link to comment Share on other sites More sharing options...
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