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I am currently trying to convert a .cr2 into .fits file. I am currently unable to create .fits as any file I create doesn't open or work because of the wrong shape of fits.

I have tried using the solution Write 3d Numpy array to FITS file with Astropy but, still, it doesn't work.

import numpy as np
from astropy.io import fits
im = imageio.imread(r'E:\FYP\cr.cr2', format="RAW-FI")
a = np.array(im)
print (a.shape)
hdu = fits.PrimaryHDU(a)
hdulist = fits.HDUList([hdu])
hdulist.writeto(r'E:\FYPcr.fits')

It successfully creates the .fits file but, gives an error when opened "Cannot read fits file". Whenever I try to open a fits file created from another software it opens without any problem.

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  • 1
    You didn't specify exactly what gives an error "Cannot read fits file". What can't read the file? Note, also, because you're on Windows you should probably use raw strings for paths like r'E\FYPcr.fits', since otherwise the `\` can be misinterpreted as part of an escape sequence. See this answer for more details. It's probably not your problem but stranger things have happened. Commented Sep 9, 2019 at 14:04
  • Any software that reads .fits images. Such as CCDStack which I currently use do not recognize the shape of this .fits file. Commented Sep 9, 2019 at 17:58
  • 1
    You could simply use ImageMagick in the Terminal magick input.cr2 output.fits Replace magick with convert if using v6 rather than v7. Commented Sep 9, 2019 at 20:31
  • Well, what is the shape? In your example you have print(a.shape) but you didn't actually tell us what it is. Maybe CCDStack can't work with arbitrary-dimensional FITS data. Commented Sep 10, 2019 at 7:38
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