Data Visualization
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D3 allows you to bind arbitrary data to a Document Object Model (DOM), and then apply data-driven transformations to the document.
d3.js
Protovis is no longer under active development. The final release of Protovis was v3.3.1 (4.7 MB) . The Protovis team is now developing a new visualization library, D3.js , with improved support for animation and interaction.
Protovis
prefuse | interactive information visualization toolkit
Prefuse is a set of software tools for creating rich interactive data visualizations.
Jeffrey Heer
Given a bitmap image of a chart, ReVision applies computer vision methods to identify the visualization type, extract the underlying data, and generate redesigned visualizations.