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International Journal of Chemical Engineering
Volume 2009, Article ID 746439, 6 pages
http://dx.doi.org/10.1155/2009/746439
Research Article

Drop Distribution Determination in a Liquid-Liquid Dispersion by Image Processing

1Instituto Superior de Engenharia do Porto (ISEP), Rua Dr. António Bernardino de Almeida, 431 Porto, Portugal
2Departamento de Matemática, Instituto Superior de Engenharia do Porto (ISEP), Rua Dr. António Bernardino de Almeida, 431 Porto, Portugal
3Departamento de Engenharia de Minas, Centro de Investigac ão Geo-Ambiental e Recursos (SIPROM-CIGAR), Faculdade de Engenharia da Universidade do Porto (FEUP), Rua Dr. Roberto Frias, 465 Porto, Portugal
4Departamento de Engenharia Química, Instituto Superior de Engenharia do Porto (ISEP), Rua Dr. António Bernardino de Almeida, 431 Porto, Portugal

Received 1 October 2008; Revised 3 December 2008; Accepted 11 January 2009

Academic Editor: Eugénio C. Ferreira

Copyright © 2009 Luís M. R. Brás et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents the implementation of an algorithm for automatic identification of drops with different sizes in monochromatic digitized frames of a liquid-liquid chemical process. These image frames were obtained at our Laboratory, using a nonintrusive process, with a digital video camera, a microscope, and an illumination setup from a dispersion of toluene in water within a transparent mixing vessel. In this implementation, we propose a two-phase approach, using a Hough transform that automatically identifies drops in images of the chemical process. This work is a promising starting point for the possibility of performing an automatic drop classification with good results. Our algorithm for the analysis and interpretation of digitized images will be used for the calculation of particle size and shape distributions for modelling liquid-liquid systems.