Bug 154829

Summary: inpainting tool doesn't use greycstoration threads
Product: [Applications] digikam Reporter: Lynda Metref <lyly>
Component: Plugin-Editor-GmicQtAssignee: Digikam Developers <digikam-bugs-null>
Status: RESOLVED FIXED    
Severity: normal CC: caulier.gilles
Priority: NOR    
Version: unspecified   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In: 5.8.0
Sentry Crash Report:

Description Lynda Metref 2007-12-29 20:16:21 UTC 
Version:            (using KDE KDE 3.5.8)
Installed from:    Ubuntu Packages
OS:                Linux

The inpainting plugin in Digikam uses the greycstoration algorithm. This algo supports multithreading but when running it through Digikam, it only uses one CPU. I compared the behaviours of Digikam 0.9.2 and greycstoration 2.5.2: only the latter uses more than one CPU.

Expected behaviour: spawn one thread per CPU.
Comment 1 caulier.gilles 2007-12-31 09:50:49 UTC 
Lynda,

Witch digiKam version you use ?

Gilles Caulier
Comment 2 Lynda Metref 2007-12-31 13:45:28 UTC 
0.9.2-final from Ubuntu gutsy repository
Comment 3 caulier.gilles 2007-12-31 14:12:27 UTC 
OK. 

This is fixed on new digiKam 0.9.3. For indeep problem in CImg library comming with 0.9.2, multithreading has not been used.

With 0.9.3, 2 separate CImg thread are used. Cimg library have been updated of course...

Gilles
Comment 4 Gerhard Kulzer 2008-01-01 14:23:03 UTC 
Gilles, 
Restauration and Resize using Greystoration work fine with 2 threads at 100% CPU. Inpainting launches 2 threads as well, but the combined load never exceeds 50%. It seems the threads exclude each other mutually, one goes up, the other down and vise-versa.

Gerhard
Comment 5 caulier.gilles 2017-09-05 05:10:50 UTC 
With 5.8.0, in-painting image editor tool was been replaced by a Clone tool.

More details here : 

https://community.kde.org/GSoC/2017/StatusReports/shazaismailkaoud

Gilles Caulier