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.
0.92: Downscaling with gamma correction posterizes dark areas
Moderators: XnTriq, helmut, xnview, Dreamer
Re: 0.92: Downscaling with gamma correction posterizes dark areas
The original have posterized area
Pierre.
Re: 0.92: Downscaling with gamma correction posterizes dark areas
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:
Re: 0.92: Downscaling with gamma correction posterizes dark areas
Still reproducible in XnView: MP 1.3 (and also in XnResize, btw).
Re: 0.92: Downscaling with gamma correction posterizes dark areas
i can't reproduce with your sample image, which output size do you use? could you post the output?
Pierre.
Re: 0.92: Downscaling with gamma correction posterizes dark areas
Try downscale to e.g. 1806x961 pixels. You can see the output image in the first post: download/file.php?id=5149&mode=view
Re: 0.92: Downscaling with gamma correction posterizes dark areas
where do you see "posterized area"?
Pierre.
Re: 0.92: Downscaling with gamma correction posterizes dark areas
On the Saturn rings. I attached an image with side-by-side comparison.
Re: 0.92: Downscaling with gamma correction posterizes dark areas
yes a known issue on dark color
Pierre.