Posted: Fri Feb 15, 2008 8:01 pm Post subject: Nifty Trick for Purple Fringe
I was getting a lot of chromatic abberration- purple fringing- in my studio shots, and I just figured out a good, fast method for getting rid of it. Go into Image>Adjustments>Hue/Saturation. In the Edit: dropdown menu, choose Blue, then toggle the saturation down to 0. It won't affect the color of the picture, but the purple fringe will disappear. Yay! _________________ Discovery consists of seeing what everybody has seen and thinking what nobody has thought. - Albert Gyorgyi
Nice tip - will have to try that one I usually use replace colour but it takes a lot of mucking about :/ _________________ There is nothing in life that cannot be improved with either monkeys, pirates or ninjas NPU Member
I've just been trying this because of some bothersome fringing and choosing Blue didn't work whereas choosing Cyan did, so worth a try. _________________
Yep, sometimes you have to desaturate the magenta, too- it all depends on what color fringe you are getting. I've actually been doing this on a duplicate layer, and then adding a layer mask- then using the brush tool to paint the effect only where I need it. Sometimes I get all three colors fringing- blue, cyan, and magenta- and have to do them all this way. This has actually been coming up a lot for me in my work lately- I don't know if it's my camera or my lighting techniques that's the culprit. _________________ Discovery consists of seeing what everybody has seen and thinking what nobody has thought. - Albert Gyorgyi
Well, I guess the technique you'd use would depend on the picture, and what is next to/ behind the fringe. You could try desaturating the entire picture on a layer, then masking it and painting over the fringe... or if that doesn't look good one thing I have resorted to is zooming in and making a selection around the fringe, then copying the area right outside of it, and pasting over the fringe. That's the best I've been able to come up with for certain colors. Hope that helps. _________________ Discovery consists of seeing what everybody has seen and thinking what nobody has thought. - Albert Gyorgyi
Well, I guess the technique you'd use would depend on the picture, and what is next to/ behind the fringe. You could try desaturating the entire picture on a layer, then masking it and painting over the fringe...
What's next to it is the white background so your next bit is exactly what I've been doing. It's not that arduous a process, but, hey, always up for a magic short cut if one's available. Thanks. _________________
In the process of playing about I discovered that if I wanted to isolate anything blue, instead of the usual cutting things out all I had to do was desaturate the reds several times.
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Yay!
I usually use replace colour but it takes a lot of mucking about :/
