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Proceedings Paper

Automatic identification of diatoms using descriptors obtained in the plane of frequencies
Author(s): Eduardo Gessel Pacheco-Venegas; Isabel Israde-Alcántara; Josué Álvarez-Borrego; Esperanza Guerra-Rosas; Esbanyely Garza-Flores
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Paper Abstract

Diatoms are unicellular algae that have as characteristic to be composed mainly of silice. Currently, its study has become relevant due to its multiple applications that include forensic medicine, palaeoenvironmental reconstructions and its use as biological bioindicators of water quality. It is estimated that there are around 100,000 different diatom species, showing a high similarity between some of them. For these reasons, their identification is slow and often unreliable. Additionally, the number of specialists capable of carrying out an identification is not sufficient in comparison to the number of samples that usually have to be analyzed. It is for these reasons that there is a need to have automated systems that perform this task. In the present work, an automatic identification system was created for 46 diatom species with different morphology using images obtained with optical microscopy. This system was designed by calculating descriptors in the plane of frequencies using three different methodologies: the Fourier Mellin transform, the concentric ring binary masks and the fractional Fourier transform. The methods used for the identification system has as main characteristics to be robust to changes of scale, rotations, translations, and lighting. Additionally, the number of images used as reference images compared to other techniques found in the literature is lower, which gives a higher possibility that it can be extended to other species.

Paper Details

Date Published: 17 September 2018
PDF: 7 pages
Proc. SPIE 10752, Applications of Digital Image Processing XLI, 1075208 (17 September 2018); doi: 10.1117/12.2320869
Show Author Affiliations
Eduardo Gessel Pacheco-Venegas, Univ. Nacional Autónoma de México (Mexico)
Isabel Israde-Alcántara, Ciudad Univ. (Mexico)
Josué Álvarez-Borrego, Ctr. de Investigación Científica y de Educación Superior de Ensenada B.C. (Mexico)
Esperanza Guerra-Rosas, Ctr. de Investigación Científica y de Educación Superior de Ensenada B.C. (Mexico)
Esbanyely Garza-Flores, Ctr. de Investigación Científica y de Educación Superior de Ensenada B.C. (Mexico)

Published in SPIE Proceedings Vol. 10752:
Applications of Digital Image Processing XLI
Andrew G. Tescher, Editor(s)

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