NDLI: Coordinate-free calibration of an acoustically driven camera pointing system

Content Provider	IEEE Xplore Digital Library
Author	Ettinger, E. Freund, Y.
Copyright Year	2008
Description	Author affiliation: Univ. of California at San Diego, La Jolla, CA (Ettinger, E.; Freund, Y.)
Abstract	We present a camera pointing system controlled by real-time calculations of sound source locations from a microphone array. Traditional audio localization techniques require explicit estimates of the spatial coordinates for each microphone in the array. In addition, positional information for the camera is needed to use such techniques to drive a camera pointing system. Sometimes this positioning can be done by hand, but for large aperture microphone arrays with many elements this is impractical. We show that in this setting, where elements are placed in an ad-hoc manner, explicitly learning the microphone positions is an unnecessary step. We give a calibration method whose focus is learning the mapping from time delays between pairs of microphones to the associated pan and tilt a PTZ-camera should be given to point at. This curtails the need to explicitly learn the microphone and camera positions. We use this method to calibrate a real-time camera pointing system used by the UCSD interactive display.
Starting Page	1
Ending Page	9
File Size	1546003
Page Count	9
File Format	PDF
ISBN	9781424426645
DOI	10.1109/ICDSC.2008.4635685
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-09-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Training Audio Sound Localization Position measurement Cameras Calibration Arrays A/V System Calibration Delay Microphones
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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