NDLI: 'Pencigraphy' with AGC: joint parameter estimation in both domain and range of functions in same orbit of the projective-Wyckoff group

Content Provider	IEEE Xplore Digital Library
Author	Mann, S.
Copyright Year	1996
Description	Author affiliation: Media Lab., MIT, Cambridge, MA, USA (Mann, S.)
Abstract	Consider a static scene and fixed center of projection, about which a camera is free to zoom, pan, tilt, and rotate about its optical axis. With an ideal camera, the resulting images are in the same orbit of the projective group-action, and each pixel of each image provides a measurement of a ray of light passing through a common point-in space. Unfortunately, most modern cameras have a built in automatic gain control (AGC), automatic shutter, or auto-iris, which, in many cases cannot be turned off. Many modern digitizers to which cameras are connected have their own AGC which also cannot be disabled. With AGC, the characteristic response function of the camera varies, making it impossible to accurately describe one image as a projective coordinate transformed version of another. This paper proposes not only a solution to this problem, but a means of turning AGC into an asset, so that even in cases where AGC could be disabled, pencigraphers of the future will be turning AGC on.
Starting Page	193
Ending Page	196
File Size	744667
Page Count	4
File Format	PDF
ISBN	0780332598
DOI	10.1109/ICIP.1996.560417
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-09-19
Publisher Place	Switzerland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Parameter estimation Cameras Layout Algebra Optical films Sensor arrays Optical sensors Extraterrestrial measurements Turning Spatial resolution
Content Type	Text
Resource Type	Article

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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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