Issue loading 32-bit TIFF

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Issue loading 32-bit TIFF

Postby Fujinon » Tue Apr 06, 2021 12:22 pm

Hi,

As per the title, i'm having issues with a 32-bit floating point TIFF, LZW compression, and 'Normal (associated)' Alpha channel.
There is a total lack of color or contrast, and a huge amount of banding present.

It appears similar to an Adobe RGB image loaded as if it were sRGB. But the color profile option is greyed-out for being Embedded.
My guess it though that the issue is not Adobe RGB, but that it's actually Linear Adobe RGB, and there may be no support for this?

Note that the same image loads normally in Affinity Photo.
Shown below is a detail crop of water unedited from Affinity, and then from SNS with everything set to 0:

_(affinity).jpg
_(affinity).jpg (199.74 KiB) Viewed 1196 times
_(sns).jpg
_(sns).jpg (175.06 KiB) Viewed 1196 times
Fujinon
 
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Re: Issue loading 32-bit TIFF

Postby Fujinon » Wed Apr 07, 2021 2:57 pm

Enabling auto-luminance makes some difference, but nowhere close to normal. Extremely flat and impossible to edit.

And i noticed that the little display icon shows From system: sRGB when it definitely is not.
Setting it to AdobeRGB doesnt change much to the flatness of the image, only a slight shift in tint.

_sns-profiles.png
_sns-profiles.png (34.52 KiB) Viewed 1183 times


This is what's shown in Affinity:

_affinity-profile.png
_affinity-profile.png (2.65 KiB) Viewed 1183 times


These screengrabs show the issue more clearly:

_(sns).png
_(sns).png (190.6 KiB) Viewed 1183 times

_(affinity).png
_(affinity).png (236.96 KiB) Viewed 1183 times
Fujinon
 
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Re: Issue loading 32-bit TIFF

Postby Sebastian Nibisz » Fri Apr 09, 2021 10:20 am

The TIFF-32 format is not fully supported. Use HDR or OpenEXR format for source HDR images.
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Sebastian Nibisz
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Re: Issue loading 32-bit TIFF

Postby Fujinon » Fri Apr 09, 2021 12:00 pm

Sebastian Nibisz wrote:The TIFF-32 format is not fully supported. Use HDR or OpenEXR format for source HDR images.


I cannot because of the missing metadata with those formats, it is a big issue for me.

A 32-bit tiff is the first thing i would expect any HDR tool to support though? :(
Fujinon
 
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Re: Issue loading 32-bit TIFF

Postby Sebastian Nibisz » Fri Apr 23, 2021 11:44 am

Can you share me one 32-bit TIFF image?
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