Digital image processing method for local determination of the center and the width of objects in the form of contrasting bands on a background
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United States of America Patent
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Jun 16, 1998
Issued Date -
N/A
app pub date -
Sep 26, 1996
filing date -
Jul 22, 1993
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Expired
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Abstract
Digital image processing method for local determination of the center and the width of objects in the form of contrasting bands on a background. A digital image processing method, for representation of objects in the form of contrasting bands of substantially uniform intensity on a substantially uniform background, includes a step for the identification of pixels situated on the central lines of the objects, which step is referred to as a 'tracking' step. This method is characterized in that the step includes a first filtering operation which is executed by applying, to each image, a series of N lozenge-type-bidimensional, selective, recursive low-pass filters having respective ones of the principal directions angulary spaced apart 180.degree./N in order to determine the direction of each band-shaped object segment as that in which the response of one of the filters is maximum.
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