Example of photo editing: Contrast correction. Left side of the image is unmodified, right side has been touched with GIMP.
<a href="https://en.wikipedia.org/wiki/User:Toniht" class="extiw" title="wikipedia:User:Toniht">Toniht</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>
Transferred from <span class="plainlinks"><a class="external text" href="https://en.wikipedia.org">en.wikipedia</a></span> to Commons by <a href="//commons.wikimedia.org/wiki/User:Wikig" title="User:Wikig">Wikig</a> using <a href="https://iw.toolforge.org/commonshelper/" class="extiw" title="toollabs:commonshelper/">CommonsHelper</a>.