Asking the Linux-Community:
There is this great Android tool on fdroid " Privacy Friendly Tape Measure" (in German: Maßband) which allows to measure stuff in photos by knowing the size of known reference objects (e.g an A4 page or an 2 Euro coin).
https://f-droid.org/en/packages/org.secuso.privacyfriendlytapemeasure/
Do you know of something similar for Linux - be it a single program or a plugin for a Linux software?
(Background: I have to renovate and done a lot of pictures of different stuff to do, would prefer to do some "measurements" on a "real screen" and not the small touchy mobile phone screen. Yes, I know that this is no replacement for "real" measurements, but sizing some standard fittings such as flush-mounted sockets or kitchen sinks is possible with such tool.)
