Note: I'm discussing about this picture here, because I couldn't really tidy up the licensing plates.
I assert that both the original and derivate work are PD-self.

Original upload log

(All user names refer to de.wikipedia)

• 2005-07-10 14:11 Waldeule 620×440×8 (13242 bytes)
• 2004-10-27 06:14 DiveMaster 620×440×8 (13242 bytes) Monitor Gamma

Licensing

This work has been released into the public domain by its author, I, Lazer erazer. This applies worldwide. In some countries this may not be legally possible; if so: I, Lazer erazer grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: I thought a checkerboard background would be more intuitive than the horizontal alternating line colours. If you find it better, too, then reference it on wikipedia articles. The downside is, that RLE can't shrink it that well... decide what you prefer. The original can be viewed here: Monitor gamma.gif: . Modifications made by Windows Vista Paint, exported via clipboard to XnView, saved as gif non-interlaced.

Original upload log

This image is a derivative work of the following images:

• File:Monitor_gamma.gif licensed with PD-self
  • 2007-07-25T14:05:34Z Createaccount 620x440 (13242 Bytes) {{Information |Description=Monitor Gamma |Source=Originally from [http://de.wikipedia.org de.wikipedia]; description page is/was [http://de.wikipedia.org/w/index.php?title=Image%3Amonitor_gamma.gif here]. |Date=2004-10-27 (fi

Uploaded with derivativeFX