Re: Banding issues with jpegs
Re: Banding issues with jpegs
- Subject: Re: Banding issues with jpegs
- From: Martin Orpen <email@hidden>
- Date: Sat, 13 Sep 2014 01:43:42 +0100
On 13 Sep 2014, at 00:37, Brian Aderer <email@hidden> 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
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden