Particle Shape Recognition with Interferometric Particle Imaging Using a Convolutional Neural Network in Polar Coordinates
Alexis Abad,
Alexandre Fahy,
Quentin Frodello,
Barbara Delestre,
Mohamed Talbi,
Marc Brunel
Affiliations
Alexis Abad
Unité Mixte de Recherche du Centre National de la Recherche Scientifique 6614 CORIA, University of Rouen Normandy, Avenue de l’Université, BP 12, 76801 Saint-Etienne du Rouvray, France
Alexandre Fahy
Unité Mixte de Recherche du Centre National de la Recherche Scientifique 6614 CORIA, University of Rouen Normandy, Avenue de l’Université, BP 12, 76801 Saint-Etienne du Rouvray, France
Quentin Frodello
Unité Mixte de Recherche du Centre National de la Recherche Scientifique 6614 CORIA, University of Rouen Normandy, Avenue de l’Université, BP 12, 76801 Saint-Etienne du Rouvray, France
Barbara Delestre
Unité Mixte de Recherche du Centre National de la Recherche Scientifique 6614 CORIA, University of Rouen Normandy, Avenue de l’Université, BP 12, 76801 Saint-Etienne du Rouvray, France
Mohamed Talbi
Unité Mixte de Recherche du Centre National de la Recherche Scientifique 6614 CORIA, University of Rouen Normandy, Avenue de l’Université, BP 12, 76801 Saint-Etienne du Rouvray, France
Marc Brunel
Unité Mixte de Recherche du Centre National de la Recherche Scientifique 6614 CORIA, University of Rouen Normandy, Avenue de l’Université, BP 12, 76801 Saint-Etienne du Rouvray, France
A convolutional neural network (CNN) was used to identify the morphology of rough particles from their interferometric images. The tested particles had the shapes of sticks, crosses, and dendrites as well as Y-like, L-like, and T-like shapes. A conversion of the interferometric images to polar coordinates enabled particle shape recognition despite the random orientations and random sizes of the particles. For the non-centrosymmetric particles (Y, L, and T), the CNN was not disturbed by the twin image problem, which would affect some classical reconstructions based on phase retrieval algorithms. A 100% recognition rate was obtained.
