Cropping .fit files?
nwj781 wrote on Jul 08, 2008
How can I crop down a .fit file containing roughly 50,000 stars to a 300x300 pixel image? I was told that ccdproc's trim function could do it, but it only appears to trim the bias section of the image.
Cheers,
Neil
Cheers,
Neil
Mike Fitzpatrick wrote on Jul 08, 2008
You can simply use an image section to copy out the region of interest to a new file, e.g.
will copy the specified section to a new image. Note that you need to specify the ".fits" extension explicitly if you're using something earlier than v2.13 or else set your 'imtype' variable to ".fits" in your login.cl file.
-Mike
cl> imcopy bigim[500:799,100:399] small.fitswill copy the specified section to a new image. Note that you need to specify the ".fits" extension explicitly if you're using something earlier than v2.13 or else set your 'imtype' variable to ".fits" in your login.cl file.
-Mike
nwj781 wrote on Jul 08, 2008
Thank you. Thank you very much so. You just made my job much easier ha ha... This definitely beats running psf analysis on 29000 stars.
Thank you.
P.S.
Thank you.
Thank you.
P.S.
Thank you.
Last post on Jul 08, 2008