LenC Posted April 1, 2016 Share Posted April 1, 2016 I have a photo with an area of dark (~black) silhouetted trees against a sky that is overexposed to white. I would like to simply select the white pixels to replace with blue. Is there a numerical threshold function that can do this, presumably on a selection where the contrast is great? Obviously highlight/shadow functions do this in a more sophisticated way. Thanks. Quote AP 1.7.3, MacOS 10.14.6 (usually latest of each, but not going to Catalina until more issues are resolved) Mac Mini, Late 2012, 2.5 GHz Intel Core i5, 8 GB; HD replaced with SSD Link to comment Share on other sites More sharing options...
anon1 Posted April 1, 2016 Share Posted April 1, 2016 There is a threshold adjustment which separates the image int B/W based on a certain threshold - you could then use Filter > Color > erase white paper and put a solid fill layer or a rectangle underneath but I´d go for a blue rectangle covering the image and then use blend If/ blend ranges https://forum.affinity.serif.com/index.php?/topic/17364-blend-if-blend-ranges/?p=79182 or you can use a gradient map to get a more refined result with more variations https://www.youtube.com/watch?v=ZB6xO8_jONU -german but you´ll easily get the idea hope that helps Quote Link to comment Share on other sites More sharing options...
LenC Posted April 2, 2016 Author Share Posted April 2, 2016 Thanks. Will have to work on this. Quote AP 1.7.3, MacOS 10.14.6 (usually latest of each, but not going to Catalina until more issues are resolved) Mac Mini, Late 2012, 2.5 GHz Intel Core i5, 8 GB; HD replaced with SSD Link to comment Share on other sites More sharing options...
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