Banding in Composited Gradients
Posted: 2011-03-08T12:29:35-07:00
Hi, all.
A question regarding "banding" when compositing gradients.
I have some (approx. 800) full-size crops (jpegs) of cloud formations. I need to apply a gradient similar to a weak, rectangular vignette to perform what you might call the digital equivalent of edge-burning in order to define the edges against a background. I can make the gradient easily enough but no matter how smooth it is I get vague(ish) banding when it's composited onto the destination. Obviously with 8-bit imagery this is always going to tend towards the problematic. The usual remedy is to add noise to the gradient in addition to the default dithering; but because of the smooth nature of the images - sky/cloud - the noise is noticeable. Just hoping vaguely that someone might have "been there; done that" and discovered/developed an alternative method.
Thanks.
Jo
A question regarding "banding" when compositing gradients.
I have some (approx. 800) full-size crops (jpegs) of cloud formations. I need to apply a gradient similar to a weak, rectangular vignette to perform what you might call the digital equivalent of edge-burning in order to define the edges against a background. I can make the gradient easily enough but no matter how smooth it is I get vague(ish) banding when it's composited onto the destination. Obviously with 8-bit imagery this is always going to tend towards the problematic. The usual remedy is to add noise to the gradient in addition to the default dithering; but because of the smooth nature of the images - sky/cloud - the noise is noticeable. Just hoping vaguely that someone might have "been there; done that" and discovered/developed an alternative method.
Thanks.
Jo