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http://dx.doi.org/10.5762/KAIS.2018.19.7.36

Image Enhancement of Image Intensifying Device in Extremely Low-Light Levels using Multiple Filters and Anisotropic Diffusion  

Moon, Jin-Kyu (Defense Agency for Technology and Quality)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.19, no.7, 2018 , pp. 36-41 More about this Journal
Abstract
An image intensifying device is equipment that makes weak objects visible in a dark environment, such as making nighttime bright enough to let objects be visually observed. It is possible to obtain a clear image by amplifying the light in the presence of a certain amount of weak light. However, in an extremely low-light environment, where even moonlight is not present, there is not enough light to amplify anything, and the sharpness of the screen deteriorates. In this paper, a method is proposed to improve image quality by using multiple filters and anisotropic diffusion for output noise of the image-intensifying device in extreme low-light environments. For the experiment, the output of the image-intensifying device was obtained under extremely low-light conditions, and signal processing for improving the image quality was performed. The configuration of the filters for signal processing uses anisotropic diffusion after applying a median filter and a Wiener filter for effective removal of salt-and-pepper noise and Gaussian noise, which constitute the main noise appearing in the image. Experimental results show that the improvement visually enhanced image quality. Both peak signal-to-noise ratio (PSNR) and SSIM, which are quantitative indicators, show improved values.
Keywords
Image Enhancement; Image Intensifying Device; Extremely Low-Light Level; Anisotropic Diffusion; Multiple Filters;
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