An enthusiastic community member recently told me how to remove the red dots on THETA image in seconds with the free software GIMP. While I’ve known about this technique for a while, this is the first time that I used the Heal Selection and Resynthesizer plug-in technique.
Like many of you, I’ve been living with the red dots.
However, with a quick selection and Heal, I easily eliminated the dots.
You can barely see the healed spot in the THETA image viewer at maximum zoom. This is with default settings.
Open THETA in GIMP. Use 100% zoom or greater. Use the ellipse selection tool to select the red dot.
Press delete key.
Select Filters -> Enhance -> Heal selection
For this test, I used the default settings.
Results were good.
For different backgrounds, you may need to use the blur tool to blur the outline. To test a fast workflow, I only applied the heal and did not apply an edge blur.
Export to jpg.
Inspect results in THETA desktop viewer.
Be free of the red dots!
Installing Gimp Plug-ins
I did not have the plug-ins on my default GIMP installation. To get these useful plug-ins, I installed the GIMP Extensions Pack for Windows.
On Debian-based Linux systems like Ubuntu, you can install the gimp-plugin-registry package with
apt install gimp-plugin-registry
If you want more information about the plugin prior to installing it, you can use
apt-cache search or
apt-cache show for details.
~$ apt-cache search gimp-plugin-registry gimp-plugin-registry - repository of optional extensions for GIMP ~$ apt-cache show gimp-plugin-registry |grep resyn Replaces: gimp-refocus (<< 0.9.0-2), gimp-resynthesizer, gimp-save-for-web Provides: gimp-resynthesizer, gimp-save-for-web Breaks: gimp-refocus (<< 0.9.0-2), gimp-resynthesizer (<< 0.16-2~), gimp-save-for-web * resynthesizer (2.0): Resynthesizer
Information on Mac OS X is here: