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Sensors 2018, 18(7), 2143; https://doi.org/10.3390/s18072143

Multi-Focus Image Fusion Method for Vision Sensor Systems via Dictionary Learning with Guided Filter

1
,
1,2,* , 1,* , 3
and
4,5
1
College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China
2
Fujian Provincial Key Laboratory of Information Processing and Intelligent Control, Minjiang University, Fuzhou 350121, China
3
College of Electrical and Engineering Information, Sichuan University, Chengdu 610064, China
4
School of Electronic Engineering, Xidian University, Xi’an 710071, China
5
Department of Embedded Systems Engineering, Incheon National University, Incheon 22012, Korea
*
Authors to whom correspondence should be addressed.
Received: 25 May 2018 / Revised: 26 June 2018 / Accepted: 30 June 2018 / Published: 3 July 2018
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Abstract

Vision sensor systems (VSS) are widely deployed in surveillance, traffic and industrial contexts. A large number of images can be obtained via VSS. Because of the limitations of vision sensors, it is difficult to obtain an all-focused image. This causes difficulties in analyzing and understanding the image. In this paper, a novel multi-focus image fusion method (SRGF) is proposed. The proposed method uses sparse coding to classify the focused regions and defocused regions to obtain the focus feature maps. Then, a guided filter (GF) is used to calculate the score maps. An initial decision map can be obtained by comparing the score maps. After that, consistency verification is performed, and the initial decision map is further refined by the guided filter to obtain the final decision map. By performing experiments, our method can obtain satisfying fusion results. This demonstrates that the proposed method is competitive with the existing state-of-the-art fusion methods. View Full-Text
Keywords: vision sensor system; multi-focus image fusion; dictionary learning; guided filter vision sensor system; multi-focus image fusion; dictionary learning; guided filter
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Li, Q.; Yang, X.; Wu, W.; Liu, K.; Jeon, G. Multi-Focus Image Fusion Method for Vision Sensor Systems via Dictionary Learning with Guided Filter. Sensors 2018, 18, 2143.

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