On 13 Sep 2014, at 00:37, Brian Aderer <ennigmatick@gmail.com> wrote:
Can anyone suggest a solution?
Make yourself a set of custom Photoshop curves that will tear the images apart and reveal any banding. I use sine wave shapes which you can create by setting curve points at regular intervals - for example: 0, 10 32, 245 64, 10 96, 245 128, 10 etc Gradients, like your backgrounds, should show smooth waves of vivid colour — but in your case they don’t look good at all and you can see some nasty, uneven and crunchy banding. Apply the curve to the image at each stage in your workflow to isolate the problem. If the raw scan is banding then you may have a problem with the scanner — although I’d suspect that the later application of a poor quality ICC profile is more likely to cause problems like this. Having said that, I have also seen background banding in film caused by degraded soft box diffuser fabrics — so it might be worth scrutinising the original shots to see if you can see any traces of banding which your workflow is enhancing. HTH :-) -- Martin Orpen Idea Digital Imaging Ltd