Unconventional edge detector: preliminary theoretical investigation

We have previously described a range-based neighbourhood operator and an experimentally discovered unconventional edge detector based on it. The latter relies on data fitting in a pixel neighbourhood, and has a wide dynamic range. A preliminary theoretical investigation of its basis, and some of its...

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Published in2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628) Vol. 1; pp. 457 - 460 vol.1
Main Authors Chandrasekhar, R., Houlis, P., Attikiouzel, Y.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2002
Subjects
Australia
Biomedical engineering
Biomedical imaging
Curve fitting
Data analysis
Detectors
Dynamic range
Image edge detection
Pixel
Road transportation
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Summary:We have previously described a range-based neighbourhood operator and an experimentally discovered unconventional edge detector based on it. The latter relies on data fitting in a pixel neighbourhood, and has a wide dynamic range. A preliminary theoretical investigation of its basis, and some of its properties, are presented in this paper. It is revealed that the edge sensitive feature is the range of pixel values in successive pixel annuli around a central pixel. It is also shown that the edge strength at any centre pixel may be approximated, in the first instance, by the sum of the logarithms of these annular range values. The derived approximation is illustrated with a synthetic image and a mammogram.
ISBN:9780780375031
0780375033
DOI:10.1109/ICDSP.2002.1027917