Image editing software

In this context, image editing includes selecting and saving regions of interest, rotating, scaling, and annotation of images.

• The FITS image viewer ds9 has all the above facilities, with the exception of annotation.
• The Gnu Image Manipulation Program, GIMP can do all of the above but has a steep learning curve.
• ImageMagick can also do all of the above and also has a steep learning curve.
• gnome-screenshot is remarkably useful for cutting out and saving an area of an image displayed on the screen.
• xpaint is a very simple application I often use to annotate images with cross-hairs, arrows, object names, etc.