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Article

A Simple, Reliable, and Inexpensive Solution for Contact Color Measurement in Small Plant Samples

1
Departamento de Edafoloxía e Química Agrícola, Facultade de Farmacia, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
2
Department of Veterinary and Animal Sciences, University of Copenhagen, Stigbøjlen 4, 1870 Frederiksberg, Denmark
3
Department of Botany, Faculty of Pharmacy, University of Santiago de Compostela, 15782 Santiago de Compostela, Galiza, Spain
*
Authors to whom correspondence should be addressed.
Sensors 2020, 20(8), 2348; https://doi.org/10.3390/s20082348
Received: 18 March 2020 / Revised: 11 April 2020 / Accepted: 17 April 2020 / Published: 20 April 2020
(This article belongs to the Special Issue Environmental Sensors and Their Applications)
Correct color measurement by contact-type color measuring devices requires that the sample surface fully covers the head of the device, so their use on small samples remains a challenge. Here, we propose to use cardboard adaptors on the two aperture masks (3 and 8 mm diameter measuring area) of a broadly used portable spectrophotometer. Adaptors in black and white to reduce the measuring area by 50% and 70% were applied in this study. Representatives of the family Campanulaceae have been used to test the methodology, given the occurrence of small leaves. Our results show that, following colorimetric criteria, the only setting providing indistinguishable colors according to the perception of the human eye is the use of a 50%-reducing adaptor on the 3-mm aperture. In addition, statistical analysis suggests the use of the white adaptor. Our contribution offers a sound measurement technique to gather ecological information from the color of leaves, petals, and other small samples. View Full-Text
Keywords: Campanulaceae; CIELAB color system; color characterization; nondestructive assessment; reflectance colorimetry; templates Campanulaceae; CIELAB color system; color characterization; nondestructive assessment; reflectance colorimetry; templates
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MDPI and ACS Style

Sanmartín, P.; Gambino, M.; Fuentes, E.; Serrano, M. A Simple, Reliable, and Inexpensive Solution for Contact Color Measurement in Small Plant Samples. Sensors 2020, 20, 2348. https://doi.org/10.3390/s20082348

AMA Style

Sanmartín P, Gambino M, Fuentes E, Serrano M. A Simple, Reliable, and Inexpensive Solution for Contact Color Measurement in Small Plant Samples. Sensors. 2020; 20(8):2348. https://doi.org/10.3390/s20082348

Chicago/Turabian Style

Sanmartín, Patricia, Michela Gambino, Elsa Fuentes, and Miguel Serrano. 2020. "A Simple, Reliable, and Inexpensive Solution for Contact Color Measurement in Small Plant Samples" Sensors 20, no. 8: 2348. https://doi.org/10.3390/s20082348

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