Validation of a Digital Photographic Protocol for Macroscopic Analysis of Wood Anatomy and Colorimetry of Tree Species in Costa Rica
Context: The process of digitizing wood samples for identification and study has become relevant over the past decade, so it is necessary to consider the photographic aspects that generate representation of the images with respect to the physical sample. Method: Ten woodable species were used with n...
| Published in: | Ecological Economics |
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| Main Authors: | , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | Spanish English |
| Published: |
Universidad Distrital Francisco José de Caldas
2022
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| Subjects: | |
| Online Access: | https://revistas.udistrital.edu.co/index.php/reving/article/view/16503 |
| Summary: | Context: The process of digitizing wood samples for identification and study has become relevant over the past decade, so it is necessary to consider the photographic aspects that generate representation of the images with respect to the physical sample. Method: Ten woodable species were used with no less than 10 sampled trees, from each individual five 10 mm edge wooden cubes were ex-brought and photographed with a stereoscope with a 20X under four luminosity protocols. In the process, the variation in color (under the coordinates L*, a* and b*), color differential (E*) and chroma (C*), in addition to the density and diameter of vessels, was evaluated. Results: The results showed that the brightness of 50% showed the greatest similarity to the colorimetry of the wood, obtaining values of E* less than 6 in all species and values of C* within the optimal range of 5 to 7. With respect to the anatomical part, the same behavior was given with the ten species, finding that the luminosity treatments at 25 and 50 % showed no significative differences, while the luminosities of 75 and 100% tended to underestimate the value. Conclusions: The treatment luminosity at 25% is ineffective by the darkening of the surface, while exposures to 75 and 100% tended to clarify the surface area and underestimate anatomical characteristics. Contexto: El proceso de digitalización de muestras de madera para su identificación y estudio ha tomado relevancia en la última década, por lo que es necesario considerar los aspectos fotográficos que generen representatividad de las imágenes con respecto a la muestra física. Método: Se utilizaron diez especies maderables con no menos de 10 árboles muestreados, de cada individuo se extrajeron cinco cubos de madera de 10 mm de arista y se fotografiaron con un estereoscopio con un aumento de 20X bajo cuatro protocolos de luminosidad. En el proceso se evaluó la variación del color (bajo las coordenadas L*, a* y b*), diferencial de color (ΔE*) y chroma (ΔC*), además de la densidad y diámetro de vasos. ... |
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