| Relative gain | `RelativeGainGotthard2` + `BadPixelsFFGotthard2` |`gain_correction`|
Beside the corrected data, a mask is stored using the badpixels constant of the same parameter conditions and time.
-`BadPixelsDarkGotthard2`
-`BadPixelsFFGotthard2`, if relative gain correction is requested.
The correction is done per sequence file. If all selected sequence files have no images to correct the notebook will fail.
The same result would be reached in case the needed dark calibration constants were not retrieved for all modules and `offset_correction` is True.
In case one of the gain constants were not retrieved `gain_correction` is switched to False and gain correction is disabled.
### Gotthard2 Dark Image Characterization
The following is a processing for offset, noise, and Badpixels maps using dark images taken with Gotthard2 detector. All constants are evaluated per strip, per pulse, and per memory cell. The maps are calculated for each gain stage that is acquired in 3 separate runs.
The following is a processing for the dark constants (`Offset`, `Noise`, and `BadPixelsDark`) maps using dark images taken with Gotthard2 detector (GH2 50um or 25um).
All constants are evaluated per strip, per pulse, and per memory cell. The maps are calculated for each gain stage that is acquired in 3 separate runs.
The three maps (calibration constants) can be injected to the database and stored locally.
The three maps can be injected to the database and/or stored locally.
