Ginga is a toolkit designed for building viewers for scientific image data in Python, visualizing 2D pixel data in NumPy arrays. It can view astronomical data such as contained in files based on the FITS (Flexible Image Transport System) file format.
The Ginga toolkit centers around an image display class which supports zooming and panning, color and intensity mapping, a choice of several automatic cut levels algorithms and canvases for plotting scalable geometric forms. In addition to this widget, a general purpose “reference” FITS viewer is provided, based on a plugin framework.
A fairly complete set of “standard” plugins are provided for features that we expect from a modern FITS viewer: panning and zooming windows, star catalog access, cuts, star pick/FWHM, thumbnails, etc.
Website: ginga.readthedocs.io
Support: GitHub Code Repository
Developer: Ginga Maintainers
License: BSD 3-Clause “New” or “Revised” License

Ginga is written in Python. Learn Python with our recommended free books and free tutorials.
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