A psychometric approach to edge detector calibration in grey-scale images

DOIResolve DOI: http://doi.org/10.1109/IMTC.2005.1604536
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Proceedings titleProceedings of the IEEE Instrumentation and Measurement Technology Conference 2005 (IMTC 2005)
Conference2005 IEEE Instrumentation and Measurement Technology Conference, 17-19 May 2005, Ottawa, Ontario, Canada
Pages20592064; # of pages: 5
Subjectpsychometric measurements; edge detection; edge slope; edge detector calibration
AbstractAn edge detection algorithm is a filter which significantly reduces the amount of information present in an image such that only high frequency changes in either range or intensity are visible in the resulting image. In order to perform effective edge detection the user must have a clear idea of the frequency above which an edge will be identified. In grey-scale images, edges represent sudden or high-frequency changes in the grey-scale, also referred to as intensity or luminence, level of an image. In practice, what is considered a "high-frequency change" is dependent upon the purpose for which the edge detector has been selected. In this paper it is proposed that to determine the minimum grey-level threshold and per-pixel intensity change at which the user deems a "true" step edge exists, psychometric testing is required. This information is then used to calibrate common edge detection methods which are subsequently used to filter a series of common grey-scale images.
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NPARC number21268160
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Record identifier1e9285b8-4076-4f35-9dfc-f63531a68d37
Record created2013-05-13
Record modified2016-05-09
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