Evaluation of focus measures in multi-focus image fusion

Authors:
Wei Huang;Zhongliang Jing
Affiliations:
Institute of Aerospace Information and Control, School of Electronics, Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai Huashan Road, Shanghai 200030, PR China;Institute of Aerospace Information and Control, School of Electronics, Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai Huashan Road, Shanghai 200030, PR China and In ...
Venue:
Pattern Recognition Letters
Year:
2007

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Abstract

Several focus measures were studied in this paper as the measures of image clarity, in the field of multi-focus image fusion. All these focus measures are defined in the spatial domain and can be implemented in real-time fusion systems with fast response and robustness. This paper proposed a method to assess focus measures according to focus measures' capability of distinguishing focused image blocks from defocused image blocks. Experiments were conducted on several sets of images and results show that sum-modified-Laplacian (SML) can provide better performance than other focus measures, when the execution time is not included in the evaluation.