Low-cost oblique illumination: an image quality assessment

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Low-cost oblique illumination: an image quality assessment

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Title: Low-cost oblique illumination: an image quality assessment
Author: Ruiz-Santaquiteria Alegre, Jesús;Espinosa Aranda, José Luis;Déniz, Óscar;Sánchez Bueno, Carlos;Borrego Ramos, María;Blanco Lanza, Saúl;Cristóbal Pérez, Gabriel;Bueno, Gloria
xmlui.dri2xhtml.METS-1.0.item-contributor: Facultad de Ciencias Biologicas y Ambientales
xmlui.dri2xhtml.METS-1.0.item-area: Ecologia
Abstract: We study the effectiveness of several low-cost oblique illumination filters to improve overall image quality, in comparison with standard bright field imaging. For this purpose, a dataset composed of 3360 diatom images belonging to 21 taxa was acquired. Subjective and objective image quality assessments were done. The subjective evaluation was performed by a group of diatom experts by psychophysical test where resolution, focus, and contrast were assessed. Moreover, some objective nonreference image quality metrics were applied to the same image dataset to complete the study, together with the calculation of several texture features to analyze the effect of these filters in terms of textural properties. Both image quality evaluation methods, subjective and objective, showed better results for images acquired using these illumination filters in compari-son with the no filtered image. These promising results confirm that this kind of illumination filters can be a practical way to improve the image quality, thanks to the simple and low cost of the design and manufacturing process.
xmlui.dri2xhtml.METS-1.0.item-desfisica: P. 1-14
xmlui.dri2xhtml.METS-1.0.item-peerreviewed: SI
Publisher: SEPI
xmlui.dri2xhtml.METS-1.0.item-citation: Journal of Biomedical Optics, 2018, vol. 23, n. 1
URI: http://hdl.handle.net/10612/9319
Date: 2018-01-02
xmlui.dri2xhtml.METS-1.0.item-tipo: info:eu-repo/semantics/article
Subject: Ecología. Medio ambiente
xmlui.dri2xhtml.METS-1.0.item-palclave: Image quality metrics
Illumination filters
Oblique illumination
Textural features
Diatoms
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