NDLI: Self-thermal radiation compensation for autofocus algorithm in infrared optical system

Content Provider	IEEE Xplore Digital Library
Author	Zhigang Fan Haili Hu Wang Zhang Jianjun Liu Shouqian Chen
Copyright Year	2012
Description	Author affiliation: Research Center for Space Optical Engineering, Harbin Institute of Technology, China (Zhigang Fan; Haili Hu; Wang Zhang; Jianjun Liu; Shouqian Chen)
Abstract	Self-thermal radiation is a key factor of reducing image quality of infrared optical system and can cause the autofocus process inefficient. A study on infrared images affected by self-thermal radiation arising from temperatures of system under test was presented to optimize autofocus algorithm. Experimental results showed that conventional autofocus functions like Gray-level Variance(GV), Laplacian of Gaussian (LoG) Operator and Discrete Cosine Transform(DCT) methods had low accuracy and sensitivity for determining the optimal imaging plane from a series of infrared images, when the optical system worked in high temperature environments. Integrating self-thermal radiation compensation algorithm to correct the image data, we put forward a new autofocus algorithm. The autofocus function was based on wavelet packet transform to extract high-frequency information from infrared images, and performances of the new algorithm were proved by Athermalization-Efficiency Assessment System.
Starting Page	1330
Ending Page	1334
File Size	935954
Page Count	5
File Format	PDF
ISBN	9781467309653
e-ISBN	9781467309646
DOI	10.1109/CISP.2012.6469680
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-16
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Temperature sensors infrared image Sensitivity Accuracy wavelet packet transform Detectors self-thermal radiation Optical imaging autofocus algorithm Optical sensors Optical surface waves
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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