Evaluation of machine learning applied to the realignment of hierarchies for image segmentation

  • Milena Menezes Adão Pontifical Catholic University of Minas Gerais
  • Silvio Jamil F. Guimarães Pontifical Catholic University of Minas Gerais
  • Zenilton K. G. Patrocínio Jr. Pontifical Catholic University of Minas Gerais

Resumo


A hierarchical image segmentation is a set of image segmentations at different detail levels. However, objects can be located at different scales due to their size differences or to their distinct distances from the camera. In literature, many works have been developed to improve hierarchical image segmentation results. One possible solution is to realign the hierarchy such that every region containing an object (or its parts) is at the same level. In this work, we have explored the use of random forest and artificial neural network as regressors models to predict score values for regions belonging to a hierarchy of partitions, which are used to realign it. We have also proposed a new score calculation witch considering all user-defined segmentations that exist in the ground-truth. Experimental results are presented for two different hierarchical segmentation methods. Moreover, an analysis of the adoption of different combination of mid-level features to describe regions and different architectures from random forest and artificial neural network to train regressors models. Experimental results have point out that the use of new proposed score was able to improve final segmentation results.

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Publicado
28/10/2019
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ADÃO, Milena Menezes; GUIMARÃES, Silvio Jamil F.; PATROCÍNIO JR., Zenilton K. G.. Evaluation of machine learning applied to the realignment of hierarchies for image segmentation. In: WORKSHOP DE TESES E DISSERTAÇÕES - CONFERENCE ON GRAPHICS, PATTERNS AND IMAGES (SIBGRAPI), 32. , 2019, Rio de Janeiro. Anais [...]. Porto Alegre: Sociedade Brasileira de Computação, 2019 . p. 119-125. DOI: https://doi.org/10.5753/sibgrapi.est.2019.8311.