Median centred difference gradient operator and its application in watershed segmentation


Young, N. and Evans, A. N., 2011. Median centred difference gradient operator and its application in watershed segmentation. Electronics Letters, 47 (3), pp. 178-180.

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    A new gradient operator for greyscale images is proposed, the output of which is based on the median centred difference of the intensities within a local mask. The operator is a simplified form of the robust colour morphological gradient and, as such, is robust to impulsive noise and provides well-localised gradient estimates. A quantitative evaluation using simulated images shows that the new operator is particularly suitable for the watershed transform, producing significantly better watershed segmentation results than conventional edge operators such as the morphological gradient and the Sobel.


    Item Type Articles
    CreatorsYoung, N.and Evans, A. N.
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    URLURL Type
    DepartmentsFaculty of Engineering & Design > Electronic & Electrical Engineering
    Publisher StatementEvans_ElecLett_2011_47_3_178.pdf: This paper is a postprint of a paper submitted to and accepted for publication in Electronics Letters and is subject to Institution of Engineering and Technology Copyright ( The copy of record is available at IET Digital Library.
    ID Code23035


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