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Can no longer process HaRGB images? After registering the Ha and RGB integrations and loading them into RGB combine, the Ha image id forcing R G and B assignments. Used to just select Ha for image then assign to red in combining. No longer works. Help?
Here are the 2 integrations for rgb combine on Dropbox:
https://www.dropbox.com/s/jzcw3trxrgxa5w4/ngc6960-Ha-lp-5700.0s-reg.fits?dl=0
Hi Greg @gregwrca,
I have downloaded the RGB and Ha integrations, thanks 😉
I can combine them into a HaRGB without problems.
If you load them into the RGB combine tool:
the RGB image channels are automatically assigned to Red, Green and Blue. Right?
Then the Ha image, since the data is 3 channel, APP assumes it's R.G.B data, but in fact it's H-alpha data.
Fits header:
SIMPLE = T / Java FITS: Mon May 21 12:06:57 PDT 2018
BITPIX = 16 / bits per data value
NAXIS = 3 / number of axes
NAXIS1 = 5211 / size of the n'th axis
NAXIS2 = 3521 / size of the n'th axis
NAXIS3 = 3 / size of the n'th axis
EXTEND = T / Extensions are permitted
BSCALE = 1.0 / scaling to 16bit
BZERO = 32768.0 / offset data range to that of unsigned short
DATE = '2018-05-21T20:00:00' / creation date of Other/Processed
DATE-OBS= 'N/A ' / observation date of Other/Processed
SOFTWARE= 'Astro Pixel Processor by Aries Productions' / software
VERSION = '1.060 ' / Astro Pixel Processor version
FRAME = 'Other/Processed' / frame was processed by Astro Pixel Processor
INSTRUME= 'NOTAVAILABLE' / instrument name
CFAIMAGE= 'no ' / Color Filter Array pattern
GAIN = -1.0 / gain or ISO depending on instrument
And you can simply override APP here:
If the window pops-up to assing a channel for the H-alpha image, sinply select Hydrogen-Alpha for the first channel. You can click cancel on the 2nd and third channel, the 3 channels will contain identical data.
Then combination is as usual:
Let me know if you can get it to work now 😉
Kind regards,
Mabula
Thanks, that makes sense...kinda. Not sure why it didn't recognize it as Ha or Custom at first. In subsequent attempts it worked perfectly, so it was something I did somewhere along the line. All is well.
Hi Greg @gregwrca, excellent.
If you process the data with new the multi-channel function, metadata will be added to indicate it's H-alpha data (or whatever you assign it to be), so then APP should definitely be able to recognize it correctly 😉
Cheers,
Mabula
