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- Volume 17 (1998)
- Number 3 - Dec. 1998
- Estimation of errors due to phase boundary position in image analysis
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Estimation of errors due to phase boundary position in image analysis
Abstract
The position of the limits of phases and objects to be measured on an image are defined with a given accuracy’s, due to the image formation itself, to thresholding and to digitization. This paper analyses the consequences of this and proposes a simple evaluation of the induced error on measurements. The method is based on the use of stereometric relationships. Accuracy on area fraction AA and specific perimeter LA are derived. The errors on the mean chord length LC, the mean equivalent diameter D of a single particle and a population of particles are deduced. Consequences such as the optimum resolution (pixel size) of an image containing objects to get a given accuracy of size measurements are also analysed. Some limits of the evaluation are pointed out.
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A propos de : Jean-Marc Chaix
Laboratoire de Thermodynamique et de Physico-Chimie Métallurgiques, UMR 5614 CNRS-INPG/UJF ENSEEG, BP75, F-38402 Saint Martin d'Hères, France
A propos de : Jean-Michel Missiaen
Laboratoire de Thermodynamique et de Physico-Chimie Métallurgiques, UMR 5614 CNRS-INPG/UJF ENSEEG, BP75, F-38402 Saint Martin d'Hères, France
A propos de : Jean-Paul Jernot
LERMAT, ISMRA, Boulevard du Maréchal Juin, 14050 Caen cedex, France