Region-based Image Fusion Using Energy Estimation

Li, Linchun; Li, Jianhua; Tie, Ling; Pan, Jun

doi:10.1109/snpd.2007.119

Cited by 3 publications

(1 citation statement)

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“…The transform-based methods [6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25] employed various transformations to do the fusion. The spatial-frequency methods concentrate on accurately measuring the focus or sharpness levels of the multi-focus images [26,27,28,29,30,31,32,33,34,35,36,37]. For example, the simplest method is averaging (AVG) where the multi-focus source images are averaged to generate the all-in-focus image.…”

Section: Related Workmentioning

confidence: 99%

Quality estimation based multi-focus image fusion

Guan

Cham

2017

2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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In this work, a fast Bilateral Solver for Quality Estimation Based multi-focus Image Fusion method (BS-QEBIF) is proposed. The all-in-focus image is generated by pixel-wise summing up the multi-focus source images with their focus-levels maps as weights. Since the visual quality of an image patch is highly correlated with its focus level, the focus-level maps are preliminarily obtained based on visual quality scores, as preestimations. However, the pre-estimations are not ideal. Thus the fast bilateral solver is then adopted to smooth the pre-estimations, and edges in the multi-focus source images can be preserved simultaneously. The edge-preserving smoothed results are utilized as final focus-level maps. Moreover, this work provides a confidence-map solution for the unstable fusion in the focus-levelchanged boundary regions. Experiments were conducted on 25 pairs of source images. The proposed BS-QEBIF outperforms the other 13 fusion methods objectively and subjectively. The all-in-focus image produced by the proposed method can well maintain the details in the multi-focus source images and does not suffer from any residual errors. Experimental results show that BS-QEBIF can handle the focus-level-changed boundary regions without any blocking, ringing and blurring artifacts.Index Terms-Multi-focus image fusion, confidence map, visual quality, the fast bilateral solver.

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