Image color banding
Oct 6, 2018 21:50:13 #
I have been reprocessing on an old Seattle skyline image recently. It is composed of 12 bracketed, 7 frame raw photos captured with a Nikon D300 then merged in Photomatix and merged to pano in Photoshop 2018 CC. I noticed color banding appearing in the sky and water reflection portions after uploading as a jpg to Facebook. I have tried a few fixes with no luck.
Attached is a screen shot from Facebook upload. Not sure the banding is as vivid here.
Solution methods attempted so far:
1. Adding a noise layer as advised in online tutorials then gently erasing banding layer areas.
2. Converting from 16 bit to 32
3. Reprocessing the hdrs in Aurora
4. Merging 12 single frame images to pano.
5 uploading as a PNG which FB did not recognize.
Any help from experienced photographers or graphic designers that have dealt with this before would be greatly appreciated. Thanks in advance, R
Attached is a screen shot from Facebook upload. Not sure the banding is as vivid here.
Solution methods attempted so far:
1. Adding a noise layer as advised in online tutorials then gently erasing banding layer areas.
2. Converting from 16 bit to 32
3. Reprocessing the hdrs in Aurora
4. Merging 12 single frame images to pano.
5 uploading as a PNG which FB did not recognize.
Any help from experienced photographers or graphic designers that have dealt with this before would be greatly appreciated. Thanks in advance, R
Oct 6, 2018 22:38:40 #
The thumbnail is too small to see any details. You'd need to store the original when posting the attachment to discuss issues in the details of the image.
Regarding the processing, FB will accept a PNG, but the best size for an image is 2048-pixels on the long side. Possibly, your PNG was too large and couldn't be compressed due to the format, and as a result, was not accepted via the upload. And / or the file was too large in bytes as well as pixels.
Regarding the processing, FB will accept a PNG, but the best size for an image is 2048-pixels on the long side. Possibly, your PNG was too large and couldn't be compressed due to the format, and as a result, was not accepted via the upload. And / or the file was too large in bytes as well as pixels.
Oct 7, 2018 10:47:40 #
CHG_CANON wrote:
The thumbnail is too small to see any details. You'd need to store the original when posting the attachment to discuss issues in the details of the image.
Regarding the processing, FB will accept a PNG, but the best size for an image is 2048-pixels on the long side. Possibly, your PNG was too large and couldn't be compressed due to the format, and as a result, was not accepted via the upload. And / or the file was too large in bytes as well as pixels.
Regarding the processing, FB will accept a PNG, but the best size for an image is 2048-pixels on the long side. Possibly, your PNG was too large and couldn't be compressed due to the format, and as a result, was not accepted via the upload. And / or the file was too large in bytes as well as pixels.
Even that wouldn't work CHG, he said the image he posted is a 'screen shot' from his Facebook post.
He needs to post the original and check the box. I'm afraid though, that he's never going to be able to get rid of the banding after converting to jpg. Converting to jpg renders the color gradations to be to far apart for smoothness causing the banding. But if he decides to print, simply print from the raw or tiff file that is still a 16-bit file. He shouldn't have banding with that file.
Oct 7, 2018 11:29:54 #
Could the banding he's talking about be from different EVs for each shot?
I use the same EV for all shots in a pano.
I use the same EV for all shots in a pano.
Oct 7, 2018 14:24:17 #
The banding is caused by the conversion. As an example I have the same problem in my tv. It is an older tv and will show banding in dark scenes. It is a gambit problem, that is not enough colors to do the transitional gradient across those subtle shade changes.
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