Bug 464301 - Force convert PNG to 8-bit on export option produces significantly worse results than manually downsampling.
Summary: Force convert PNG to 8-bit on export option produces significantly worse resu...
Status: RESOLVED WORKSFORME
Alias: None
Product: krita
Classification: Applications
Component: File formats (show other bugs)
Version: nightly build (please specify the git hash!)
Platform: Kubuntu Linux
: NOR normal
Target Milestone: ---
Assignee: amyspark
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-01-14 23:20 UTC by Ralek Kolemios
Modified: 2023-05-31 03:45 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:


Attachments
left- 'Force convert to 8 bit', right - manual merge and convert to 8 bit (161.89 KB, image/png)
2023-01-14 23:20 UTC, Ralek Kolemios
Details

Note You need to log in before you can comment on or make changes to this bug.
Description Ralek Kolemios 2023-01-14 23:20:22 UTC
Created attachment 155297 [details]
left- 'Force convert to 8 bit', right - manual merge and convert to 8 bit

I've attached a comparison between the two. For some reason, selecting 'Force convert to 8-bit' when exporting as a PNG compresses the image significantly more than manually flattening the image and changing the bit depth to 8 bit.
Comment 1 amyspark 2023-01-15 03:00:11 UTC
I was just working locally on this as a toy project. Assigning.
Comment 2 amyspark 2023-05-01 01:19:07 UTC
Hi! Sorry for getting back to you so late. Can you send us a sample KRA that I can work with, and the settings you're using for the down conversion and export, respectively?
Comment 3 Bug Janitor Service 2023-05-16 03:46:03 UTC
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 4 Bug Janitor Service 2023-05-31 03:45:25 UTC
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!