Horizon Home	Overview	Examples
	Documentation	Download	Acknowledgements

The Horizon Image Data Browser

Documentation

An Introduction to the Horizon Java Package

To be released with Horizon2.0beta, this document gives an overview of the Horizon package and its goals. It includes an introduction to the currently available applets and applications that come with the package and how one begins to create new ones using the Horizon classes.

"Supporting Metadata and Coordinate Systems for Scientific Data in the Horizon Java Package"

An article explaining Horizons support for metadata and world coordinate systems. This document gives tutorial examples intended for programmers who wish to support new data formats or new coordinate systems. (This article is also available in PostScript or gzipped PostScript format.)

package ncsa.horizon.viewable

the visualization interface into a dataset.

The most important interface is called Viewable, which provides other classes with access to both visualizations of the dataset and the data itself in a format-independent way. Implementations of this interface access format-specific data readers.

package ncsa.horizon.viewer

viewers for displaying 2D visualizations of data

package ncsa.horizon.data

classes for directly accessing image data in a format-independent and type-safe way

package ncsa.horizon.coordinates

classes that map data voxels to world coordinates.

package ncsa.horizon.awt

other GUI helper classes

Classes from this package include a canvas for double-buffered display of images, display cursors and regions-of-interest, a tabbed card panel, and more.

package ncsa.horizon.util

non GUI helper classes This package includes the classes that support metadata as well as those used to select subsets of a dataset (like Volume, Slice, Segment, and Voxel).

package ncsa.horizon.modules

GUI panels for controlling an applet or application.

This package includes panels that control zooming, animation, data selection, etc.

• Horizon: An Image Data Browser Implemented in Java
  Plante, R., Goscha, D., and Plutchak, J. 1996, Design White Paper.

• Java, Image Browsing, and the NCSA Astronomy Digital Image Library
  Plante, R.L., Goscha, D., Crutcher, R.M., McGrath, R.E.M., Lu, X., and Folk, M. 1997, Astronomical Data Analysis Software and Systems VI, ASP Conference Series, Vol. 125.

The National Center for Supercomputing Applications
University of Illinois at Urbana-Champaign

horizon@ncsa.uiuc.edu

Last modified: January 19, 1998