Incompatible Geometry Issue

[Farzad_k]

Hi,

I first started having this issue with calibrating light frames of FIT format with darks and biases of NEF format. So I decided to re-do the darks and biases using SGP so that I could have darks and biases in same format as lights.

I am still getting the problem with geometry being incompatible and calibration does not happen. I am looking at the image header information and for the same camera I am getting a report of different x and y sizes. Is this the geometry issue?

[georg.viehoever]

Yes.
For calibration to work, the system must be able to find the same physical pixels in bias, flat, dark and light. If any of these has different geometry, this cannot be done.
Georg

[chrisvdberge]

I stumbled on the same problem recently. Seems to be due to the fact that PI uses a different image size than the 'real' one. At least, when I open up images in my windows or mac image viewer they report different image size than PI does. Any other progrem you use in the calibration process could introduce incompatible frames this way. (or the other way around; PI introduces incompatible frames;))
These pixel values look very familiar