alecspra Posted March 30, 2016 Share Posted March 30, 2016 Hi, I have been restoring some old black and white photographs (really old). I typically choose first the Black and White adjustment first so that I can play with the color sliders. What I noticed is that sometimes nothing at all happens to the image when I move the sliders and sometimes something does change. My question is: If you are working on an original B&W image why do the color sliders respond sometimes and sometimes not, since there is no color information? And if they respond, based on what do they respond (again since there is no color information)? I also noticed that when I start from a color photograph and then change it to black and white, the color sliders on the B&W adjustment can make a significant impact on the picture and i assume that is because the color information is there. Anyway, I am just curious about this and wonder if someone has a reasonable explanation. Thanks! Quote Link to comment Share on other sites More sharing options...
Staff MEB Posted March 30, 2016 Staff Share Posted March 30, 2016 Hi alecspra, I'm having trouble reproducing it. Can you post a link to an image where this happens? Quote A Guide to Learning Affinity Software | Affinity Quick Reference Link to comment Share on other sites More sharing options...
alecspra Posted March 31, 2016 Author Share Posted March 31, 2016 Hi, thanks! Next time I run into this issue I'll see how I can send you a link to the image. Anyway, my question still is: Is the B&W adjustment supposed to have an effect on an original B&W photograph or does it work only if you are converting a color photo to B&W? And if it does have an effect on an original B&W photo, based on what is the effect operating (since there is no color information)? Quote Link to comment Share on other sites More sharing options...
Staff MEB Posted March 31, 2016 Staff Share Posted March 31, 2016 No, it shouldn't have effect on black and white images. It uses colour information to adjust the lightness values for each color. So it requires a colour image to perform the conversion. alecspra 1 Quote A Guide to Learning Affinity Software | Affinity Quick Reference Link to comment Share on other sites More sharing options...
alecspra Posted April 1, 2016 Author Share Posted April 1, 2016 Ok. Many thanks! Quote Link to comment Share on other sites More sharing options...
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