Hi Adam,
I was viewing the above and experimented on my own flats and this is the problem I ran into:
My MasterFlat using the Statistics Process showed a Mean= 19371. After applying this Pixel Math expression "$T - .15" the Mean now=34329. Why does not subtraction take place?
If I turn off "rescale result" which produces the Mean value I was looking (14335) when used as the replacement Master Flat it fails to calibrate in BPP by generating this error: *** Error: Zero or insignificant scaling factor for flat frame CFA component 0. (empty or marginal master flat frame data?)
If I enable "rescale result" the output is far higher than expected. My goal was to obtain a Mean value in the 14000 range.
Thanks,
Bill
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