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Proceedings Paper

Improving image quality of thermal imaging system by dynamically evening local histogram
Author(s): Wenjian Chen; Zeying Chi; Xianjun Yue
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Paper Abstract

Under the condition of being covered by anti-infrared smoke screen, the grayscales of infrared image becomes fairly concentrated, thus the contrast will be worse. In order to improve the image quality of thermal image of target and decrease the time of being covered by anti-infrared smoke, a new method of improving quality of thermal image by evening dynamic local histogram is presented in this paper. A slide window is used for selecting the interested range of target. The histogram ofthe window is calculated by a program first, then the local histogram is evened so as to modify the grayscale of the center pixel of the window. The grayscales distribution of the infrared thermal image changes continuously under the condition of being covered with anti-infrared smoke, so the program will calculates the transformation function of evening dynamic local histogram of the selected window continuously, and modify the whole displaying image. The infrared image quality ofthe target in selected area is improved by using this method. The effective covering time ofanti-infrared image decreases 3 to 4 seconds, and this is very valuable for tracking target.

Paper Details

Date Published: 30 August 2002
PDF: 4 pages
Proc. SPIE 4925, Electronic Imaging and Multimedia Technology III, (30 August 2002); doi: 10.1117/12.481609
Show Author Affiliations
Wenjian Chen, Nanjing Univ. of Science and Technology (China)
Zeying Chi, Nanjing Univ. of Science and Technology (China)
Xianjun Yue, Nanjing Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 4925:
Electronic Imaging and Multimedia Technology III
LiWei Zhou; Chung-Sheng Li; Yoshiji Suzuki, Editor(s)

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