A model for image generation and symbol recognition through the deformation of lineal shapes

Authors:
E. Valveny;E. Martí
Affiliations:
Computer Vision Center, Dept. Informàtica, Universitat Autònoma de Barcelona, Edifici O, Campus UAB, 08193 Bellaterra (Cerdanyola del Valles), Spain;Computer Vision Center, Dept. Informàtica, Universitat Autònoma de Barcelona, Edifici O, Campus UAB, 08193 Bellaterra (Cerdanyola del Valles), Spain
Venue:
Pattern Recognition Letters
Year:
2003

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Abstract

We describe a general framework for the recognition of distorted images of lineal shapes, which relies on three items: a model to represent lineal shapes and their deformations, a model for the generation of distorted binary images and the combination of both models in a common probabilistic framework, where the generation of deformations is related to an internal energy, and the generation of binary images to an external energy. Then, recognition consists in the minimization of a global energy function, performed by using the EM algorithm. This general framework has been applied to the recognition of hand-drawn lineal symbols in graphic documents.