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Well, SHG works, but it seems my data are not of sufficient quality..
First, PIPP ROI selection has problems, there are errors when I specify tall and narrow crop area near the middle of the original frame.
I tried with default frame size which contains a lot of rubbish (noise, inverse band (produced by spectrometer - I will have to screen that somehow if I can't find something better for ROI extraction)), so SHG is totally confused.
It seems SHG expects only one line in video, or locks on the first one found?
If so, perhaps I can position the line of interest (H-alpha.. at the moment it is near the centre of the frame) at the left-most side of the frame, in which case PIPP will be able to discard unwanted right part.
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