Quote:
Originally Posted by ChrisV
We often stretch the hell out of our pictures - well I do anyway.
Given that we are boosting small signals relative to larger ones I imagine that the "effective width" of our bandpass filters is a lot more than than the half width stated in the filter specs ? Or maybe the bandpass filters have a really steep slope at the cuff off frequencies so this is negligible ?
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The "stray" signal is mixed with the "real" signal in pixels so they both get stretched together by the same amount. There's no mechanism that stretches the extreme ends of the pass band more than the middle.
Cheers,
Rick.