try reading the input image before the options
You are right, I should have written it this way, but the artifacts are still there when I rearrange it unfortunately.
I suspect the banding problem comes from quantum=8 in ordinary jpegs, but it's hard to tell without an example.
I does look ...
Search found 2 matches
- 2012-12-18T07:37:37-07:00
- Forum: Users
- Topic: -color-matrix causes patchy colours but only with JPEG
- Replies: 4
- Views: 6130
- 2012-12-17T04:16:34-07:00
- Forum: Users
- Topic: -color-matrix causes patchy colours but only with JPEG
- Replies: 4
- Views: 6130
-color-matrix causes patchy colours but only with JPEG
Hi,
I'm using -color-matrix on a bunch of images to change colour temperature slightly:
convert -quality 94 -color-matrix "1.0 0 0 0 0.975 0 0 0 0.95" x.jpg y.jpg
Problem is, in blue sky areas, this sometimes causes patchy colours and banding issues. However, and this is the strange part, if I ...
I'm using -color-matrix on a bunch of images to change colour temperature slightly:
convert -quality 94 -color-matrix "1.0 0 0 0 0.975 0 0 0 0.95" x.jpg y.jpg
Problem is, in blue sky areas, this sometimes causes patchy colours and banding issues. However, and this is the strange part, if I ...