Human Viewable (color composite) Image creation.

Creates a composite colour image from sets of input FITS files, following the Lupton et al (2004) composition algorithm (with extensions by Hogg & Wherry.)

• Phil Marshall (Oxford) dr.phil.marshall@gmail.com
• Cato Sandford (NYU)
• Anupreeta More (IPMU)

October, 2012

compose.py takes in 3 FITS files as input, and returns a color composite, color-saturated png image with an arcsinh stretch.

In the attic there is an attempt (deconvolve.py) at a reworked version of the Magain, Courbin & Sohy (1998) deconvolution algorithm, that is non-operational. The problem of how to bring images from 3 different filters to a common resolution remains open. For now, don't go in the attic!

I have an image in each of three bandpasses, called i.fits, r.fits and g.fits, in the current directory. I wish to combine the three new images into an RGB color composite.

compose.py i.fits r.fits g.fits

The composition script requires:

• the Python Image Library (PIL) available from http://www.pythonware.com/products/pil/
• numpy