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  • License MIT

astronomical image display right in your browser

Package Exports

  • js9

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (js9) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

DOI

JS9: image display right in your browser

What does it do?

JS9 brings astronomical image display to your browser:

  • display FITS images and tables in a web page
  • display FITS data cubes and multi-extension files
  • drag and drop FITS images and tables
  • retrieve FITS files from data archives
  • change the colormap and scale
  • image pan, zoom and blink, table binning
  • image arithmetic, Gaussian smoothing
  • blend images and apply RGB image filters
  • configure mouse movements and touch events
  • create and manipulate regions of interest
  • extend JS9 using plugins and the public API
  • perform data analysis (local and server-side)
  • configure and control JS9 from within a web page
  • control JS9 from a command shell or Python
  • print images, save images, etc ...

Where can I learn more ... or try it out?

The JS9 web site contains on-line documentation, demos, and release downloads:

http://js9.si.edu

Just drag and drop your FITS files onto the JS9 display ...

Of course, the latest version is available here on GitHub:

https://github.com/ericmandel/js9

Python users might want to look at pyjs9, the Python connection to JS9:

https://github.com/ericmandel/pyjs9

To install or not to install ...

JS9 is changing how we think about image display and analysis, moving beyond the Desktop into the web. You can simply drag and drop a FITS image from your computer onto a JS9 display. All of basic JS9/DS9 functionality is immediately available: zoom, pan, colormaps, scaling, regions, WCS, etc.

So, in principle, there is no need to install anything: just use the JS9 web site to view your FITS images. Simply drag and drop an image onto the JS9 display.

Obviously, more flexibility is available if you download JS9: you can craft your own web pages, configure default values, add your own analysis tasks, etc. For full installation instructions, start with the JS9 install page. But really, you can just clone or download the JS9 source, display the js9.html page in your browser, and drag and drop a FITS file onto the JS9 display.

You can extend JS9 using the Plugin facility in combination with the JS9 Public API. For example, you can perform browser-based analysis on the displayed image. On the JS9 web site, click the Plugins tab, create a region, and move it around ...

In addition, URL-based data files support server-side analysis (using the original data files on the back-end server). Server-side analysis can be run, for example, in response to region changes, with the results displayed back in your browser. On the JS9 web site, click the Analysis tab, choose a task, create a region, and move it around ...

We are very interested in exploring new uses for JS9 as we evolve its functionality in response to community needs. If you would like to join the fun, please contact me at: eric@cfa.harvard.edu.

What's the license?

JS9 is distributed under the terms of The MIT License.

Who's responsible?

Eric Mandel, Alexey Vikhlinin

Harvard-Smithsonian Center for Astrophysics