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Old 23-09-2012, 09:52 AM
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PRejto (Peter)
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Is Resizing of Flat Frame Possible?

Hello,

I have a good series of flat frames binned 1x1. Can I resize these images to 2x2 image size in photoshop to use for reducing 2x2 binned images, or must I take a new series binned 2x2?

Many thanks,

Peter

Last edited by PRejto; 23-09-2012 at 10:27 AM.
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Old 23-09-2012, 03:20 PM
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troypiggo (Troy)
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I haven't tried it, but thinking logically - flats are for optical path calibration, so I would think that resizing them for binned shots would be fine.
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Old 23-09-2012, 04:26 PM
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The other purpose of flat correction is to adjust for variances in CCD sensitivity between sensor elements. A resampled flat won't do this accurately, but it may not be that noticeable. Probably a bad thing to do if you're doing photometry!

Cheers,
Rick.
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Old 23-09-2012, 06:21 PM
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PRejto (Peter)
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Thanks guys,
I think I shall experiment and see if I can detect a difference!
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