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Spatial Resolution and Dynamic Range Enhancement Algorithm using Multiple Exposures  

Choi, Jong-Seong (School of Electrical and Electronic Engineering, Yonsei University)
Han, Young-Seok (School of Electrical and Electronic Engineering, Yonsei University)
Kang, Moon-Gi (School of Electrical and Electronic Engineering, Yonsei University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.45, no.6, 2008 , pp. 117-124 More about this Journal
Abstract
The approaches to overcome the limited spatial resolution and the limited dynamic range of image sensors have been studied independently. A high resolution image is reconstructed from multiple low resolution observations and a wide dynamic range image is reconstructed from differently exposed multiple low dynamic range in es based on signal processing approach. In practical situations, it is reasonable to address them in a unified context because the recorded image suffers from limitations of both spatial resolution and dynamic range. In this paper, the image acquisition process including limited spatial resolution and limited dynamic range is modelled. With the image acquisition model, the response function of the imaging system is estimated and the single image of which spatial resolution and dynamic range are simultaneously enhanced is obtained. Experimental results indicate that the proposed algorithm outperforms the conventional approaches that perform the high resolution and wide dynamic range reconstruction sequentially with respect to both objective and subjective criteria.
Keywords
Image Reconstruction; Dynamic Range; Spatial Resolution; Camera Response Function;
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