A Flexible DSP-based Network for Real-Time Co-operative Windowing Applications
✍ Scribed by S.C. Nassif; D.W. Capson
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 98 KB
- Volume
- 3
- Category
- Article
- ISSN
- 1077-2014
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✦ Synopsis
A Flexible DSP-based Network for Real-Time Co-operative Windowing Applications
he architecture described in this paper is relevant to focus-of-attention applications such as visual tracking in which regions-of-interest (or windows) are used to reduce image data rates. TI t is particularly suited to robot guidance applications where high-speed image processing is required for real-time position control. The design is based on a 200 frames per second digital camera, programmable gate array technology, and a network of TMS320C40 digital signal processor modules.
The system is configurable to allow acquisition and processing of selected windows within the camera's field-of-view, and the size and location of these regions are dynamically updated on a frame-by-frame basis, based on processing results such as the motion of a target. Using the highspeed communication ports of the DSPs, the windows may be made co-operative by exchanging information among processors to allow real-time adaptation to visual motion. The system is modular, independent of the host computer, and may be readily extended to include any number of windows.
Several window placement and sizing strategies have been developed. A real-time motion tracking experiment that uses sum-of-squared differences and normalized cross-correlation techniques is described to demonstrate the system capabilities. Experimental results are included, together with a description of the architecture.