| Process Biotechnology |
Plant Biotechnology |
| Electronic Journal of Biotechnology
ISSN: 0717-3458 |
Vol. 8 No. 3, Issue of December 15, 2005 |
| © 2005 by Pontificia Universidad Católica de Valparaíso -- Chile |
Received February 15, 2005 / Accepted June 22 , 2005 |
| DOI: 10.2225/vol8-issue3-fulltext-1 |
|
Comparison of shape analysis methods for Guinardia citricarpa
ascospore characterization
Mário Augusto Pazoti
Institute
of Mathematics
and Computer Science
University of São
Paulo
Av. Trabalhador São-Carlense,400, Centro
CP 668
CEP 13560-970
São Carlos, São Paulo,
Brazil
Tel: 55 16 33739671
E-mail: pazoti@icmc.usp.br
Rogério
Eduardo Garcia
Institute
of Mathematics and Computer
Science
University of São
Paulo
Av. Trabalhador São-Carlense,400, Centro
CP 668
CEP 13560-970
São Carlos, São Paulo,
Brazil
Tel: 55 16 33739671
E-mail: regarcia@icmc.usp.br
José
Dalton Cruz Pessoa
Embrapa Instrumentação Agropecuária
Rua XV de Novembro, 1452
CEP 13560-970
São Carlos, SP, Brazil
Tel: 55 16 33739671
E-mail: dalton@cnpdia.embrapa.br
Odemir Martinez
Bruno*
Institute
of Mathematics and Computer
Science
University of São
Paulo
Av. Trabalhador São-Carlense,400, Centro
CP 668
CEP 13560-970
São Carlos, São Paulo,
Brazil
Tel: 55 16 33739671
E-mail: bruno@icmc.usp.br
*Corresponding
author
Financial
support: FAPESP - the State of São Paulo Research Funding Agency -
Grant 03/04826-9, Brazil.
Keywords:
computer vision, curvature, pattern recognition, shape analysis,
shape signature and projection.
Among
the diseases affecting the commercial citrus production, the citrus
black spot (CBS) is considered to cause substantial losses. The analyses
of particles in suspension in the orchards and collected into a disc
have been applied as a preventive action trying to identify the presence
of fungus spores before symptom appearance. In this paper, we show
the results of several shape analysis methods applied to the fungus,
the first step to the aimed computer aided vision system, capable
to assist the identification process. Experiments and comparative
results among the methods are presented in this paper, showing that
better results were obtained applying the curvature method.
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