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15 November 1993 Electronic pan/tilt/zoom camera system
Steven D. Zimmermann
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Proceedings Volume 1952, Surveillance Technologies and Imaging Components; (1993) https://doi.org/10.1117/12.161401
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States
Abstract
A patented camera system for omnidirectional image viewing applications that provides pan, tilt, zoom, and rotational orientation within a hemispherical field-of-view utilizing no moving parts has been developed. The imaging device is based on the effect that the image from a fisheye lens, which produces a circular image of an entire hemispherical field-of-view, can be mathematically corrected using high speed electronic circuitry. More specifically, an incoming fisheye image from any image acquisition source is capture in memory of the device, a transformation is performed for the viewing region-of-interest and viewing direction, and a corrected image is output as a video image signal for viewing, recording, or analysis. As a result, this device can accomplish the functions of pan, tilt, rotation, and zoom throughout a hemispherical field-of-view without the need for any mechanical mechanisms. A programmable transformation process provides flexible control over viewing situations. Multiple images, each with different image magnifications and pin-tilt-rotate parameters, can be obtained from a single camera.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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Steven D. Zimmermann "Electronic pan/tilt/zoom camera system", Proc. SPIE 1952, Surveillance Technologies and Imaging Components, (15 November 1993); https://doi.org/10.1117/12.161401
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KEYWORDS
Cameras
Image processing
Imaging systems
Video
Video processing
Zoom lenses
Image filtering
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