The Hubble Palette - The effect of Image Processing

Combining images from narrowband filters is often done using the
Hubble tri-colour palette, in which SII, Ha, and OIII are assigned to
R, G, and B, respectively.

These images show the effect of subsequent processing on images of the
North America Nebula in Cygnus (NGC 7000) taken with a Takahashi Sky
90 with SBIG ST-10MXE. The three images were, in order, unprocessed,
digitally developed using MaxIm DL and digitally developed then
stretched in MaxIm DL.

http://www.martin-nicholson.info/ima...lepalette2.htm


Martin Nicholson, Daventry, England.

My website is at http://www.martin-nicholson.info/1/1a.htm
My informal Astronomical Blog is at http://ukastronomy.livejournal.com/