Edo is a high-performance and high-quality image compositing application designed for maximum flexibility. Edo lets you combine and manipulate video files, 3D sequences and still images in a non-destructive way using a powerful node graph visual interface. The use of modern video card graphics processors (GPUs) enables true realtime performance, and support for industry standard file formats helps integrate Edo into many kinds of workflow.

The composition tree

At the heart of Edo is the composition tree, a graph that offers a unified view of all the operations that result in the final image. Operations are represented by nodes with inputs, outputs and parameters. Each node takes data from its input ports, processes it in some way and outputs the result from its output ports. A mouse drag is enough to create or modify connections between nodes.

The node graph makes the compositing process more transparent and more easily modified. The entire process is visible at once, making it easy to insert or modify operations at any stage. You can also preserve an unlimited number of variations and alternative versions as separate "branches".

Not just 2D images

Although images are the kind of data that you're most likely to use in Edo, there are other useful data types that can also be processed in an Edo composition tree: scalar values (plain old numbers), drawings (resolution-independent GPU drawing operations), and geometry (2D shapes or 3D polygon meshes). For example, you could use a scalar value obtained from audio data to drive the opacity parameter of an image processing node.

Because 3D operations are integrated directly into Edo's node graph architecture, you can animate an image in three-dimensional space by simply dragging a new 3D Layer node into your composition. 3D calculations take full advantage of your video card's 3D acceleration features, so nodes can perform very complex operations and still run in real-time. To eliminate jaggy polygon edges, full scene antialiasing is supported.

Layers of control

You can control parameter values in several ways: by connecting the parameter to a number output in the composition tree, by attaching an oscillator (a simple value generator) to the parameter, or by setting keyframes in the Curve Editor. Keyframes can be linear or Bezier curves.

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Copyright (C) 2007 Alain Georgette / Copyright (C) 2006 Frantisek Hliva. All rights reserved.