<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0121-750X</journal-id>
<journal-title><![CDATA[Ingeniería]]></journal-title>
<abbrev-journal-title><![CDATA[ing.]]></abbrev-journal-title>
<issn>0121-750X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Distrital Francisco José de Caldas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0121-750X2022000200200</article-id>
<article-id pub-id-type="doi">10.14483/23448393.16503</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Validación de un protocolo fotográfico digital para análisis macroscópico de la anatomía y colorimetría en madera de especies arbóreas de Costa Rica]]></article-title>
<article-title xml:lang="en"><![CDATA[Validation of a Digital Photographic Protocol for Macroscopic Analysis of Wood Anatomy and Colorimetry of Tree Species in Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valverde]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arias-Aguilar]]></surname>
<given-names><![CDATA[Dagoberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Figueroa]]></surname>
<given-names><![CDATA[Geovanni]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mata]]></surname>
<given-names><![CDATA[Erick]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zamora]]></surname>
<given-names><![CDATA[Nelson]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Concepción Facultad de Ciencias Forestales ]]></institution>
<addr-line><![CDATA[Concepción ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Tecnológico de Costa Rica Escuela de Ingeniería Forestal ]]></institution>
<addr-line><![CDATA[Cartago ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Tecnológico de Costa Rica Escuela de Matemáticas ]]></institution>
<addr-line><![CDATA[Cartago ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Tecnológico de Costa Rica Escuela de Ingeniería en Computación ]]></institution>
<addr-line><![CDATA[Cartago ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Tecnológico de Costa Rica Escuela de Ingeniería en Computación ]]></institution>
<addr-line><![CDATA[Cartago ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<volume>27</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0121-750X2022000200200&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0121-750X2022000200200&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0121-750X2022000200200&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  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 diez árboles muestreados. De cada individuo se extrajeron cinco cubos de madera de 10 mm de arista y se fotografiaron mediante un estereoscopio con un aumento de 20x bajo cuatro protocolos de luminosidad. En el proceso se evaluaron variaciones del color (bajo las coordenadas L*, a* y b*), el diferencial de color (&#8710;E*) y el chroma (&#8710;C*), además de la densidad y diámetro de vasos.  Resultados:  Los resultados mostraron que la luminosidad del 50 % fue la que mostró la mayor similitud con la colorimetría de la madera, obteniendo valores de &#8710;E* inferiores a 6 en todas las especies y valores de &#8710;C* dentro del rango óptimo de 5 a 7. Con respecto a la anatomía de los individuos, se dio el mismo comportamiento con las diez especies; se encontró que los tratamientos de luminosidad al 25 y 50 % no mostraron diferencias significativas, mientras que las luminosidades al 75 y 100 % tendieron a subestimar los valores.  Conclusiones:  El tratamiento de luminosidad al 25 % es poco efectivo por el oscurecimiento de la superficie, mientras que las exposiciones al 75 y 100 % tendieron a aclarar la superficie y subestimar las características anatómicas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Context:  The process of digitizing wood samples for identification and study has become increasingly relevant over the past decade, which is why it is necessary to consider photographic aspects that generate representation of the images with respect to the physical sample.  Method:  Ten timber species were used with no less than ten sampled trees. From each individual, five wooden cubes with a 10 mm edge were extracted and photographed with a stereoscope at 20x magnification under four luminosity protocols. During the process, variations in color (under the coordinates L*, a*, and b*), color differential (E*), and chroma (C*) were evaluated in addition to the density and diameter of the vessels.  Results:  The results showed that a 50 % brightness showed the greatest similarity to the colorimetry of the wood, obtaining E* values of less than 6 in all species, as well as C* values within the optimal range of 5 to 7. Regarding the anatomy of the individuals, the same behavior was observed in the ten species; it was found that the luminosity treatments at 25 and 50 % showed no significant differences, while the luminosities of 75 and 100 % tended to underestimate the values.  Conclusions:  The treatment with 25 % luminosity is ineffective due to the darkening of the surface, while exposures of 75 and 100 % tended to clarify the surface and underestimate anatomical characteristics.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[bosque natural]]></kwd>
<kwd lng="es"><![CDATA[anatomía de la madera]]></kwd>
<kwd lng="es"><![CDATA[CIELAB]]></kwd>
<kwd lng="en"><![CDATA[natural forest]]></kwd>
<kwd lng="en"><![CDATA[wood anatomy]]></kwd>
<kwd lng="en"><![CDATA[CIELAB]]></kwd>
</kwd-group>
</article-meta>
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