Optimized block-based connected components labeling with decision trees

  • Authors:

  • Costantino Grana;Daniele Borghesani;Rita Cucchiara

  • Affiliations:

  • Dipartimento di Ingegneria dell'Informazione, Università degli Studi di Modena e Reggio Emilia, Emilia, Italy;Dipartimento di Ingegneria dell'Informazione, Università degli Studi di Modena e Reggio Emilia, Emilia, Italy;Dipartimento di Ingegneria dell'Informazione, Università degli Studi di Modena e Reggio Emilia, Emilia, Italy

  • Venue:
  • IEEE Transactions on Image Processing
  • Year:
  • 2010

Quantified Score

Hi-index 0.02

Visualization

Abstract

In this paper, we define a new paradigm for eight-connection labeling, which employes a general approach to improve neighborhood exploration and minimizes the number of memory accesses. First, we exploit and extend the decision table formalism introducing OR-decision tables, in which multiple alternative actions are managed. An automatic procedure to synthesize the optimal decision tree from the decision table is used, providing the most effective conditions evaluation order. Second, we propose a new scanning technique that moves on a 2×2 pixel grid over the image, which is optimized by the automatically generated decision tree. An extensive comparison with the state of art approaches is proposed, both on synthetic and real datasets. The synthetic dataset is composed of different sizes and densities random images, while the real datasets are an artistic image analysis dataset, a document analysis dataset for text detection and recognition, and finally a standard resolution dataset for picture segmentation tasks. The algorithm provides an impressive speedup over the state of the art algorithms.