<?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>1390-6542</journal-id>
<journal-title><![CDATA[Enfoque UTE]]></journal-title>
<abbrev-journal-title><![CDATA[Enfoque UTE]]></abbrev-journal-title>
<issn>1390-6542</issn>
<publisher>
<publisher-name><![CDATA[Universidad UTE]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1390-65422017000400027</article-id>
<article-id pub-id-type="doi">10.29019/enfoqueute.v8n4.170</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Hacia la construcción de un dispositivo de asistencia para personas no videntes en el juego de cuarenta]]></article-title>
<article-title xml:lang="en"><![CDATA[Towards the construction of a device to support blind people in the cuarenta game]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortega]]></surname>
<given-names><![CDATA[Holger]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tufiño]]></surname>
<given-names><![CDATA[Rodrigo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estévez]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Politécnica Salesiana  ]]></institution>
<addr-line><![CDATA[Quito ]]></addr-line>
<country>Ecuador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2017</year>
</pub-date>
<volume>8</volume>
<numero>4</numero>
<fpage>27</fpage>
<lpage>40</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_arttext&amp;pid=S1390-65422017000400027&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_abstract&amp;pid=S1390-65422017000400027&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_pdf&amp;pid=S1390-65422017000400027&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El presente trabajo tiene como objetivo el desarrollo de un sistema de reconocimiento automático de una carta de baraja ubicada sobre una mesa, como parte del proyecto más general de crear un dispositivo para asistir a personas no videntes en el juego de azar denominado &#8220;cuarenta&#8221;. El objeto de dicho dispositivo será informar al usuario de las cartas en juego, vía audio. Para esta fase del proyecto se utilizó el algoritmo de k-vecinos más cercanos entrenados con un conjunto de caracteres alfanuméricos sintéticos. El conjunto de prueba constó de fotografías tomadas en condiciones controladas de iluminación, con las cartas ubicadas en orientación arbitraria. La parametrización del algoritmo arrojó un valor de 1 como k óptimo, con el cual se obtuvo un error de clasificación en el conjunto de prueba de 5%. Solo dos caracteres fueron confundidos por el clasificador, la &#8220;A&#8221; y la &#8220;J&#8221;, con errores de 20% y 40% cada uno. El algoritmo fue implementado en un sistema embebido Raspberry Pi 3, y obtuvo un tiempo de respuesta de 5 segundos, incluida la conversión a audio, y una ocupación de memoria RAM que no superó el 60% de la capacidad del sistema. Estos resultados sugieren su aplicabilidad en dispositivos portátiles.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The present work has the objective of developing a system for the automatic recognition of a playing card on a table, as part of a more general project to create a device to assist the blind in the chance game called &#8220;cuarenta&#8221;. The goal of this device is to inform the user about the cards being played, via audio. For this phase of the project the algorithm used was k-NN, trained with a set of alphanumeric synthetic characters. The test set contained photographs taken in controlled lighting conditions, with the cards positioned in arbitrary orientations. The parameterization of the algorithm gave a value of 1 as the optimal k, with which a classification error of 5% was obtained in the test set. Only two characters were confused by the classifier, the &#8220;A&#8221; and the &#8220;J&#8221;, with 20% and 40% error each one. The algorithm was implemented in an embedded Raspberry Pi 3 system, obtaining a response time of 5 seconds, including the conversion to audio, and a memory occupation no greater than 60% of the total capacity of the system. These results suggest its applicability in portable devices.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[reconocimiento automático]]></kwd>
<kwd lng="es"><![CDATA[visión artificial]]></kwd>
<kwd lng="es"><![CDATA[k vecinos más cercanos]]></kwd>
<kwd lng="es"><![CDATA[juegos de azar]]></kwd>
<kwd lng="es"><![CDATA[inclusión.]]></kwd>
<kwd lng="en"><![CDATA[automatic recognition]]></kwd>
<kwd lng="en"><![CDATA[artificial vision]]></kwd>
<kwd lng="en"><![CDATA[k-nearest neighbors]]></kwd>
<kwd lng="en"><![CDATA[playing cards]]></kwd>
<kwd lng="en"><![CDATA[inclusion.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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