公开(公告)号：WO1992021208A1

公开(公告)日：1992-11-26

申请号：PCT/US1992003728

申请日：1992-05-05

Applicant: TELEROBOTICS INTERNATIONAL, INC.

Inventor： TELEROBOTICS INTERNATIONAL, INC. ,  ZIMMERMAN, Steven, D.

IPC: H04N07/00

CPC classification number: H04N5/23238 ,  A61B2090/0813 ,  G03B37/06 ,  G06T3/0018 ,  G06T3/0062 ,  G08B13/19628 ,  H04N1/2158 ,  H04N1/217 ,  H04N5/2259 ,  H04N5/2628 ,  H04N5/335 ,  H04N7/002 ,  H04N7/183

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 (1), which produces a circular image of an entire hemispherical field-of-view, which can be mathematically corrected using high speed electronic circuitry (5, 6, 7, 12 and 13). More specifically, an incoming fisheye image from any image acquisition source (2) is captured in memory (4) 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. The preferred embodiment of the image transformation device can provide corrected images at real-time rates, compatible with standard video equipment. The device can be used for any application where a conventional pan-and-tilt or orientation mechanism might be considered including inspection, monitoring, surveillance, and target acquisition.