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EXcalibrator, versions <
4.1, had two problems with images calibrated and plate solved by
PixInsight.
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PixInsight rescales
the pixel values from 0.0 to 1.0. I am guessing this allows some
programming advantage. EXcalibrator expects data scaled as it come
from the CCD sensor. In the case of 16-bit data, this is 0 to
65,535.
Fortunately, PixInsight
offers a solution. After calibrating, registering and stacking your (L)RGB
masters save a separate set as 16-bit unsigned integer. With this format
PI scales the pixel values from 0 to 65,535 and makes eXcalibrator
happy.
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EXcalibrator's second
problem relates to images plate solved by PixInsight. EXcalibrator
incorrectly determined the vertical flip orientation. Version 4.1
solves this problem.
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