The Ginga Viewer and Toolkit Manual

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Ginga is a toolkit for building viewers for scientific data in Python, particularly astronomical data. It includes a reference viewer for viewing FITS (Flexible Image Transport System) files. The Ginga viewer is based on an image display object 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, the fits viewer provides a flexible plugin framework for extending the viewer with many different features. A fairly complete set of standard plugins are provided for features that we expect from a modern viewer: panning and zooming windows, star catalog access, cuts, star pick/fwhm, thumbnails, etc.

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