I was just looking at an extremely flickering waterfall picture of a (already calibrated) CFL spectrum. I was wondering if the flickering only affected intensities or wavelengths, too. So I used the "SET NEW CROSS SECTION" button to use a different line number of the picture. As soon as I hit "APPLY" the spectrum lost its calibration and went back to "uncalibrated pixels". Do you have any idea why? Do I have to re-calibrate every time I use a different cross-section?
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Yes, it doesnt make the assumption that all cross sections are equal because it doesn't know if you uploaded or live-waterfall-captured -- uploads may not preserve calibration over vertical variation.
That said, if you're interested we could open an issue to make it take a best guess if it's live captured, and not invalidate calibration if so? Or maybe prompt you and ask "does calibration still hold?" ...when doing the cross section.
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I like the latter approach ("does calibration still hold?") best. Otherwise you have to recalibrate each time for a new cross section which is a bit annoying. Perhaps that would be something for the next program update?
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