16bit images -> 6MB?
AnTaR3s wrote on Apr 10, 2010
Hi
I've got a simple question, just to understand what IRAF does:
Consider this:
I've got images with a resolution of 1536x1024 an 16bit. This makes a 3MB file for each image and this is also what I get.
But when I process the images with IRAF (ccdproc, etc.) the resulting images have 6MB at the same resolution. Is IRAF stretching the data producing 32bit images, or happens something else?
cheers
I've got a simple question, just to understand what IRAF does:
Consider this:
I've got images with a resolution of 1536x1024 an 16bit. This makes a 3MB file for each image and this is also what I get.
But when I process the images with IRAF (ccdproc, etc.) the resulting images have 6MB at the same resolution. Is IRAF stretching the data producing 32bit images, or happens something else?
cheers
Mike Fitzpatrick wrote on Apr 10, 2010
Some types of processing produce floating-point output, taking your 16-bit int data to 32-bit floating-point. You can use IMHEAD to verify the larger image is now real.
AnTaR3s wrote on Apr 10, 2010
Had something like that in mind, thanks!
;)
;)
Last post on Apr 10, 2010