Page History

...

Come to think of it, ‘polar plot of the data’ could be a useful function (remap 2D data into radius-angle in 2D) - but depends on knowledge of the beam centre and detector tilt - which may be lacking - so would have to be used with extreme care.

IAnton adds these thoughts)

Is that bad pixel masks are not necessarily a constant.  They can change from frame to frame. 

For example with the AGIPD (admittedly an EuXFEL problem) we found that the bad pixel mask depended on memory cell and gain setting.  And then possibly if signal was in one of the regimes near gain switching where calibration was unreliable.
In other words, bad pixel mask changed per shot - first due to which memory cell, then how much signal was on the pixel.  
This makes it not a ‘det.calibconst’.  
My suggestion was to have space for a ‘bad pixels in this event’ rather than a constant mask applied for all events. 

Although sometimes there may of course be a constant masks, for example for truly dead pixels.