Contour Tracking When Two Gray-Level Discontinuities Are Close to Each Other

  • Authors:
  • Marcello Demi;Elisabetta Bianchini;Francesco Faita;Vincenzo Gemignani

  • Affiliations:
  • CNR Institute of Clinical Physiology, Pisa, Italy 56124 and Esaote SpA, Firenze, Italy 50127;CNR Institute of Clinical Physiology, Pisa, Italy 56124;CNR Institute of Clinical Physiology, Pisa, Italy 56124;CNR Institute of Clinical Physiology, Pisa, Italy 56124

  • Venue:
  • CIARP '08 Proceedings of the 13th Iberoamerican congress on Pattern Recognition: Progress in Pattern Recognition, Image Analysis and Applications
  • Year:
  • 2008

Quantified Score

Hi-index 0.00

Visualization

Abstract

Vascular measurements are indispensable to quantify important indexes of cardiovascular risk and image processing systems are needed to automatically track the vascular structures through sequences of echographic images. Given a starting contour cnon frame fn, a contour tracking algorithm is generally based on the application of a mathematical operator at the points of cnand on an iterative procedure which brings such points to the respective points of the contour cn+ 1on the subsequent frame fn+ 1. In this paper, the performances of a mathematical operator which looks for similar regional gray level distributions are compared to those of an edge detection operator. The paper shows that when two or more gray-level discontinuities are present and close to each other, as in the case of arteries, both operators should be used sequentially.