0.92: Downscaling with gamma correction posterizes dark areas

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Daniel710
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Joined: Mon Oct 08, 2018 5:30 pm

0.92: Downscaling with gamma correction posterizes dark areas

Post by Daniel710 » Tue Oct 09, 2018 5:39 pm

XnView: MP 0.92 - 64 bit
OS: Linux

Downscaling an image with gamma correction posterizes dark areas. See the attached image (50% size of the original).

To reproduce, downscale an image with "Use gamma correction" enabled.
PIA11667.jpg

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xnview
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Re: 0.92: Downscaling with gamma correction posterizes dark areas

Post by xnview » Sun Oct 14, 2018 11:15 am

The original have posterized area
Pierre.

Daniel710
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Joined: Mon Oct 08, 2018 5:30 pm

Re: 0.92: Downscaling with gamma correction posterizes dark areas

Post by Daniel710 » Mon Oct 15, 2018 9:53 am

The posterized image you see in my post is the downscaled version of the original. I don't see any artifacts on the original image:
Image

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