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Proceedings Paper

4DCapture/4DPlayer: evolving software packages for capturing, analyzing and displaying two- and three-dimensional motion data
Author(s): James S. Walton; Peter N. Hodgson; Karen G. Hallamasek
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Paper Abstract

In September 2002, during the 25th Congress on High Speed Photography and Photonics, 4DVideo described a general purpose software application for the PC platform. This software (4DCaptureTM) is designed to capture, analyze and display multiple video sequences. The application extracts trajectories and other kinematic information from (highspeed) video streams. Since 4DCaptureTM was originally described, it has matured, and a second application (4DPlayerTM) has been introduced to support the distribution and viewing of video streams and kinematic data acquired by 4DCaptureTM. 4DPlayerTM is "freeware". It may be redistributed to third parties, but it may not be modified. 4DCaptureTM provides a structured environment for experimental data. Cameras are treated as transducers-that is, a source of technical data. The application provides an interface to the cameras for previewing the object-space, calibrating the images, and testing. This application can automatically track multiple landmarks seen from two or more views in two or three dimensions. Trajectories can be processed within the main application or they can be exported to a spreadsheet where they can be processed or passed along to a more sophisticated, data analysis application. 4DCaptureTM also incorporates a simple animation capability and a friendly (FlowStackTM) user interface that assists the end-user to capture and treat image sequences in a natural progression. 4DCaptureTM employs the AVI 2.0 standard and DirectX technology. 4DPlayerTM can be used to view multiple video sequences simultaneously and perform simple measurements of displacements and angles that vary over time. This application can detect and display the coordinates of landmarks previously identified by 4DCaptureTM that have been embedded in the video streams.

Paper Details

Date Published: 11 January 2007
PDF: 12 pages
Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 627903 (11 January 2007); doi: 10.1117/12.725053
Show Author Affiliations
James S. Walton, 4DVideo (United States)
Peter N. Hodgson, 4DVideo (United States)
Karen G. Hallamasek, 4DVideo (United States)


Published in SPIE Proceedings Vol. 6279:
27th International Congress on High-Speed Photography and Photonics

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