Improving image quality of thermal imaging system by dynamically evening local histogram

Wenjian Chen; Zeying Chi; Xianjun Yue

doi:10.1117/12.481609

30 August 2002 Improving image quality of thermal imaging system by dynamically evening local histogram

Wenjian Chen, Zeying Chi, Xianjun Yue

Proceedings Volume 4925, Electronic Imaging and Multimedia Technology III; (2002) https://doi.org/10.1117/12.481609
Event: Photonics Asia, 2002, Shanghai, China

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.

Citation Download Citation

Wenjian Chen, Zeying Chi, and Xianjun Yue "Improving image quality of thermal imaging system by dynamically evening local histogram", Proc. SPIE 4925, Electronic Imaging and Multimedia Technology III, (30 August 2002); https://doi.org/10.1117/12.481609

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