SCIENTIA SINICA Informationis, Volume 48, Issue 8: 1000-1021(2018) https://doi.org/10.1360/N112017-00085

Multi-focus image fusion method based on discrete Tchebichef transform and focus measure

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  • ReceivedAug 28, 2017
  • AcceptedOct 18, 2017
  • PublishedFeb 1, 2018


Transform-based image fusion methods are widely used in multi-focus image fusion owing to their promising fusion effect, and their noise robustness. However, the time complexity of conventional transform-based image fusion methods is generally high. In this paper, a multi-focus image fusion method based on the discrete Tchebichef transform (DTT) and a focus measure is proposed. According to the relationship between DTT and a correlation analysis, the focus measure of image blocks in source images can be evaluated by limited low-order DTT coefficients. Hence, the source images are fused by the principle of maximum focus measure. Our experimental results show that the proposed method can reduce the fusion time while ensuring the fusion effect, and exhibit high noise robustness during image fusion.

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