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Article

Multisensor Super Resolution Using Directionally-Adaptive Regularization for UAV Images

Department of Image, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 156-756, Korea
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Sensors 2015, 15(5), 12053-12079; https://doi.org/10.3390/s150512053
Received: 27 March 2015 / Accepted: 20 May 2015 / Published: 22 May 2015
(This article belongs to the Special Issue UAV Sensors for Environmental Monitoring)
In various unmanned aerial vehicle (UAV) imaging applications, the multisensor super-resolution (SR) technique has become a chronic problem and attracted increasing attention. Multisensor SR algorithms utilize multispectral low-resolution (LR) images to make a higher resolution (HR) image to improve the performance of the UAV imaging system. The primary objective of the paper is to develop a multisensor SR method based on the existing multispectral imaging framework instead of using additional sensors. In order to restore image details without noise amplification or unnatural post-processing artifacts, this paper presents an improved regularized SR algorithm by combining the directionally-adaptive constraints and multiscale non-local means (NLM) filter. As a result, the proposed method can overcome the physical limitation of multispectral sensors by estimating the color HR image from a set of multispectral LR images using intensity-hue-saturation (IHS) image fusion. Experimental results show that the proposed method provides better SR results than existing state-of-the-art SR methods in the sense of objective measures. View Full-Text
Keywords: multisensor super-resolution (SR); UAV image enhancement; regularized image restoration; image fusion multisensor super-resolution (SR); UAV image enhancement; regularized image restoration; image fusion
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MDPI and ACS Style

Kang, W.; Yu, S.; Ko, S.; Paik, J. Multisensor Super Resolution Using Directionally-Adaptive Regularization for UAV Images. Sensors 2015, 15, 12053-12079. https://doi.org/10.3390/s150512053

AMA Style

Kang W, Yu S, Ko S, Paik J. Multisensor Super Resolution Using Directionally-Adaptive Regularization for UAV Images. Sensors. 2015; 15(5):12053-12079. https://doi.org/10.3390/s150512053

Chicago/Turabian Style

Kang, Wonseok, Soohwan Yu, Seungyong Ko, and Joonki Paik. 2015. "Multisensor Super Resolution Using Directionally-Adaptive Regularization for UAV Images" Sensors 15, no. 5: 12053-12079. https://doi.org/10.3390/s150512053

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