I'm still reading about Stellar Astrophysics and more specific on the radiative transfer equation linked to limb darkening and in view of analysing images on exoplanets.
Some literature make reference to some interesting software called ImageJ (or FIJI is Just ImageJ). According to the website the software is able to display, edit, analyze, process, save and print 8-bit, 16-bit and 32-bit images. It can read many image formats including TIFF, GIF, JPEG, BMP, DICOM, FITS and "raw". It supports "stacks", a series of images that share a single window. It is multithreaded, so time-consuming operations such as image file reading can be performed in parallel with other operations.
It can calculate area and pixel value statistics of user-defined selections. It can measure distances and angles. It can create density histograms and line profile plots. It supports standard image processing functions such as contrast manipulation, sharpening, smoothing, edge detection and median filtering.
This is the link to the website for more information.
ImageJ is open source software with many plugin possibilities for astronomy. There is even a package called AstroImageJ - see this link.
