Image meta data

[Alex-developer]

Discussed in #3814

^{Originally posted by stevedee August 16, 2024}
Although the text overlay module is super useful, I like to capture 'clean' images, free of clutter, once the system has been properly setup.
So wondered if you could implement the addition of image EXIF data.

I notice in the c++ file: capture_RPi.cpp some notes to implement this:-

/* TODO: what exif fields should we use?
if (myModeMeanSetting.meanAuto != MEAN_AUTO_OFF) {
stringstream strExposureTime;
stringstream strReinforcement;
strExposureTime << myRaspistillSetting.shutter_us;
strReinforcement << myRaspistillSetting.analoggain;

	command += " --exif IFD0.Artist=li_" + strExposureTime.str() + "_" + strReinforcement.str();
}

*/

I'd suggest as a minimum:-
exposure: number (ms)
gain: number
auto exposure: yes/no
auto gain: yes/no

Nice-to-have:-
author: text
camera: text
lens: text
camera temperature: 'C
focus metric: number
longitude:
latitude:

Many thanks!