Importance

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Abstract

A device for omnidirectional image viewing providing pan-and-tilt orientation, rotation, and magnification within a hemispherical field-of-view that utilizes no moving parts. 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 is captured on a Charge Coupled Diode array in such a way as to remove the distortion caused by the lens by locating the picture pickup elements in a nonlinear manner described herein. 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. The preferred embodiment of the image capture device can provide corrected images at standard video frame rates, compatible with standard video equipment. The device can be used for aiming the video device in any application where a conventional pan-and-tilt or orientation mechanism might be considered including inspection, monitoring, surveillance, video teleconferencing, and target acquisition.

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First Claim