XnView Software

Is Lanczos3 broken in 1.5.1? it produces blocky presentation.

Also 1.5.1 ends on it own if I open a path with more heic files and scroll and in eventviewer it logs a crash.

Klaus1189 wrote: Thu Jul 20, 2023 4:31 pm Is Lanczos3 broken in 1.5.1? it produces blocky presentation.

What do you means? In 1.5.0 it works? which high zoom quality do you have?

Also 1.5.1 ends on it own if I open a path with more heic files and scroll and in eventviewer it logs a crash.

Its a known issue

https://drive.google.com/file/d/1IIgPHK ... sp=sharing
It is a screenshot of 3840x2160p. View this picture and set downscaler to Lanczos3 in high quality scaler for downsizing
look at the text, there it is obvious:

Lanczos3:
https://drive.google.com/file/d/1FnIb4O ... sp=sharing

Bilinear:
https://drive.google.com/file/d/10nfmbH ... sp=sharing



Can I disable HEIC in settings somewhere and use HEIC extension from Microsoft?
I have HEIC and HEVC plugin installed which works fine in Windows Explorer.

be sure to watch the screenshots of the screenshot in 1:1 scaling, to see it properly but I am sure you know this

you view this file at which zoom? do you use high dpi scaling?
Same problem in 1.4.5 or 1.5.0?

Klaus1189 wrote: Fri Jul 21, 2023 10:26 am Can I disable HEIC in settings somewhere and use HEIC extension from Microsoft?
I have HEIC and HEVC plugin installed which works fine in Windows Explorer.

Currently no way

I just recognized, that I was just lucky with bilinear, all other than bilinear are affected.

But only downscaling is poor quality - "blocky" - looks like bad upscale.

I use 200% scaling of system. 1.5.2 has same issue.
I need to test old versions to be sure when it was introduced.

1.4.5 is fine.

1.5.0 is first affected version

I retested with new 1.5.2 x64 windows installer, same as before.

Windows x64 SETUP version SHA256: F866F16B92846028356B8CE938F3AE5AE85E5686798A72849DB0D0A4801048A2
Windows x64 SETUP version SHA256: 0914012693A66FAE4BB42972B007C8ECFC3321732B158AB2D583CD3A3DC86B13

EDIT: HEIC crash is fixed for me in 1.5.2

So to summarize:
- 1.4.5 is fine
- since 1.5.0 every HQ scaler is broken for downscaling except Bilinear.

Can you reproduce it?

i can't reproduce. Do you use window font scaling?

I use 200% scaling of windows which also applies for text.

I removed settings files in Roaming and used default settings.
Same issue.
Do you think newest Nvidia driver could also be a culprit?

I retested 1.5.3, same issue