A survey of subpixel edge detection methods for images of heat-emitting metal specimens

Anna Fabijańska

International Journal of Applied Mathematics and Computer Science, Tome 22 (2012), p. 695-710 / Harvested from The Polish Digital Mathematics Library

Résumé

In this paper the problem of accurate edge detection in images of heat-emitting specimens of metals is discussed. The images are provided by the computerized system for high temperature measurements of surface properties of metals and alloys. Subpixel edge detection is applied in the system considered in order to improve the accuracy of surface tension determination. A reconstructive method for subpixel edge detection is introduced. The method uses a Gaussian function in order to reconstruct the gradient function in the neighborhood of a coarse edge and to determine its subpixel position. Results of applying the proposed method in the measurement system considered are presented and compared with those obtained using different methods for subpixel edge detection.

Détail

Publié le : 2012-01-01

Zbl 1303.94006

EUDML-ID : urn:eudml:doc:244059

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