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Author Topic: How to avoid banding in blue skies in small files  (Read 1364 times)
marimagen
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« on: August 22, 2012, 12:29:27 PM »
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Hi, how do I avoid banding in blue skies in the small jpegs I use in my website. Is there a better compression method/quality combination (or some other trick) I can use to avoid this phenomenon? Thanks in advance, Marie
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Mark D Segal
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« Reply #1 on: August 22, 2012, 02:28:42 PM »
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Rebuild the sky with a couple of colour fill layers, one darker, one lighter, and a gradient to blend the tonality from darker to lighter to keep it natural-looking. You can select also the exact shade of blue you want on each layer. It's a lot easier than trying to mess with low-data JPEGs. To resave as a JPEG you will need to flatten it, so keep one copy as a TIFF, with the layers intact for future adjustments should the need arise.
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Mark D Segal (formerly MarkDS)
Author: "Scanning Workflows with SilverFast 8....." http://www.luminous-landscape.com/reviews/film/scanning_workflows_with_silverfast_8.shtml
Keith Reeder
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« Reply #2 on: August 22, 2012, 02:46:13 PM »
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Not enough infomation, Marie - what are you doing to the files before they're "finished"? Is your workflow jpeg from start to finish, or do you do the post-processing "heavy lifting" on tiff conversions of your Raw files? What compression setting are you using for the files? And what software are you processing them in?
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Keith Reeder
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marimagen
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« Reply #3 on: August 24, 2012, 07:32:33 AM »
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Hi, I start with a raw file. I open it in PS, "clean" it a bit and then I reduce its size (1024 pix and 72 ppp), and save it as a jpeg (medium quality compression to produce a 200 Kb size file).
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Guillermo Luijk
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« Reply #4 on: August 29, 2012, 03:52:49 PM »
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Why don't you show us what you are talking about?
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