NDLI: Use of a cold mirror system for citrus fruit identification

Content Provider	IEEE Xplore Digital Library
Author	Peilin Li Sang-Heon Lee Hung-Yao Hsu
Copyright Year	2011
Description	Author affiliation: Division of ITEE, School of AMME, University of South Australia, Mawson Lakes Campus, Adelaide, Australia (Peilin Li; Sang-Heon Lee; Hung-Yao Hsu)
Abstract	This paper presents a portable multispectral data acquisition system for extending part of citrus fruit imaging and measurement purpose. An economic mechanic based fixture has been made to position and align a classical cold mirror and two CCD cameras in relative kinematic position. With optocoupler interface, two cameras have been synchronized to capture the images at the same view to acquire certain spectral area from the visible to the near infrared area based on the cold mirror function. To register both images from two cameras, the software based self calibration has been done to estimate the precision of two cameras position relative to the 3D object pattern frame via the cold mirror. The issues regarding the calibration and the distortion produced by the lens on real images have been discussed. The calibration result from the bi-camera system achieved averagely no more than 2 pixels misalignment error corresponding to less than 8 micrometer with non-uniform error distribution on the whole image. The real time fruit citrus images from both cameras have been segmented to estimate the misalignment error to select the well aligned images for the study.
Starting Page	376
Ending Page	381
File Size	400863
Page Count	6
File Format	PDF
ISBN	9781424487271
e-ISBN	9781424487288
DOI	10.1109/CSAE.2011.5952491
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-10
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	CCD (Charge-coupled device) VIS(Visible) Nonlinear distortion Fixtures NIR(Near Infrared) Cameras Calibration Cold Mirror Mirrors Pixel Lenses
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
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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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