Automatic choice of the threshold of a grain filter via Galton-Watson trees. Application to granite cracks detection
Résumé
The goal of this paper is the presentation of post-processing method allowing to remove impulse noise in binary images, while preserving thin structures. We use a grain filter as in [5]. We propose a method to automatically determine the required threshold using Galton-Watson processes. We present numerical results using X-tomography images of a granite block (2D and 3D) to illustrate how we get rid of the noise while cracks are kept.
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