Help me solve this problem...

[specialman]

Got asked by our repro dept. to do a bit of searching about what looks like some kind of fringing on the shot below.

Basically, the shot has come in from a freelancer displaying this. We don't know if it's been faffed with as a raw shot, or whether or not there's been any processing applied before it's arrived at our end. It's weird that this 'fringing' appear on areas of what should be deep black and not around the edges of the high-contrast area (along the outside of the branches).

We're on CS2 so wanted to know firstly, what it actually is (looks like colour shift you get on trannies), and secondly, if there is any function within PS that'll correct it. I've done a quick fix using a duplicate layer set to multiply, desaturated the top layer an then fiddled around with colour balance and saturation, but for any further shots that come through, a correction function would be good for CAs and fringing to make it an easier process.

 

[richpips]

I've just run the jpeg through PTLens and can get rid of some of the CA, but not all of it.

 

[Chappers]

I wonder if it's "overprocessing" that's caused the problem. Pure speculation on my part, but suppose the image was shot as jpeg, not RAW. Found to be underexposed,corrected. then some curve work or similar to get an the silhouette effect. Throw in a bit of sharpening and you can get some odd results.

That or he has the cheapest lens in the world with all that CA. Although I must admit it doesn't look like CA as it appears to be very selective

 

[joxby]

lost a bit of colour but...:shrug:

 

[specialman]

I got this by duplicating the layer, desaturating the top layer, altering hue/saturatiuon, flattening then using hue/saturation again. Not as good as Joxby's though - how did you get it like that?

 

[joxby]

Nikon Capture > Tint > save as jpg....3 seconds total and that includes running NC

Luckily this is a straight silhouette, just black and a base colour, tint wouldn't work with anything more complicated