{"id":143,"date":"2026-04-17T11:30:55","date_gmt":"2026-04-17T16:30:55","guid":{"rendered":"https:\/\/academia.utp.edu.co\/ia-e-industria\/?page_id=143"},"modified":"2026-05-10T18:52:29","modified_gmt":"2026-05-10T23:52:29","slug":"seguimiento-visual-de-un-manipulador-serial-utilizando-dnn","status":"publish","type":"page","link":"https:\/\/academia.utp.edu.co\/ia-e-industria\/seguimiento-visual-de-un-manipulador-serial-utilizando-dnn\/","title":{"rendered":"Seguimiento Visual de un Manipulador Serial Utilizando DNN"},"content":{"rendered":"\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading has-text-align-center has-black-color has-text-color has-link-color wp-elements-d94ebff2c37deb031b3d33cecb11aeac\"><strong>Autores:<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-5ded261aa156fff218aaaf62f714a6bb wp-block-paragraph\">Kevin David Ortega Qui\u00f1ones, Byron S. Hern\u00e1ndez, Jorge I. Sep\u00falveda, Henry Medeiros, Germ\u00e1n Andr\u00e9s Holgu\u00edn Londo\u00f1o.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<h1 class=\"wp-block-heading has-black-color has-text-color has-link-color wp-elements-ad50cd65d6c6333d549ac7ca33df6254\"><strong>Problema<\/strong><\/h1>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-fd87008b76a5816353203b3e4a982c4c wp-block-paragraph\">En la industria, se presenta un desaf\u00edo cr\u00edtico relacionado con la estimaci\u00f3n de la pose (posici\u00f3n y orientaci\u00f3n) del efector final de un brazo rob\u00f3tico articulado de 6 grados de libertad. Tradicionalmente, esta estimaci\u00f3n se ha llevado a cabo utilizando encoders ubicados en las articulaciones del robot. Sin embargo, esta aproximaci\u00f3n convencional se enfrenta a un problema significativo, ya que los encoders pueden acumular errores a lo largo del tiempo debido a diversas fuentes, como la fricci\u00f3n, el juego mec\u00e1nico y las tolerancias de fabricaci\u00f3n.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-03477f4651fc62125c8dcbb6dbe3248b wp-block-paragraph\">Como respuesta a esta problem\u00e1tica en la industria, se propone una alternativa de bajo costo y altamente efectiva: la implementaci\u00f3n de un sistema de estimaci\u00f3n visual basado en c\u00e1maras RGBD. Estas c\u00e1maras, que proporcionan informaci\u00f3n de color y profundidad en tiempo real, ofrecen un enfoque innovador para resolver este desaf\u00edo. A trav\u00e9s de la captura de datos visuales del entorno y el seguimiento preciso del brazo rob\u00f3tico en acci\u00f3n, se busca determinar con exactitud la posici\u00f3n tridimensional y la orientaci\u00f3n del efector final.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/14f9f113-7f9a-4f3d-8097-2aeda30322d7-300x300.png\" alt=\"\" class=\"wp-image-69\" srcset=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/14f9f113-7f9a-4f3d-8097-2aeda30322d7-300x300.png 300w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/14f9f113-7f9a-4f3d-8097-2aeda30322d7-150x150.png 150w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/14f9f113-7f9a-4f3d-8097-2aeda30322d7.png 463w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption class=\"wp-element-caption\">Figura&nbsp;1:&nbsp;Brazo UR5 en el entorno de simulaci\u00f3n Gazebo.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color wp-elements-e59db135a866c4ee50dc2d6b2b0eb793\"><strong>Base de datos<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-d2ad1b54c028bdf5be5f4a701b4b721d wp-block-paragraph\">Para entrenar el sistema, se cre\u00f3 una base de datos simulada utilizando ROS, Gazebo y un modelo de un brazo UR5. Se situaron 3 c\u00e1maras RGBD en posiciones fijas apuntando hacia el brazo. Mediante muestreo de Montecarlo se generaron poses aleatorias del brazo dentro de su espacio de trabajo. Para cada pose generada, se guardaron las im\u00e1genes RGB y de profundidad de las 3 c\u00e1maras.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"223\" height=\"300\" src=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig2a-223x300.png\" alt=\"\" class=\"wp-image-145\" srcset=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig2a-223x300.png 223w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig2a.png 295w\" sizes=\"auto, (max-width: 223px) 100vw, 223px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"223\" height=\"300\" src=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig2b-223x300.png\" alt=\"\" class=\"wp-image-146\" srcset=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig2b-223x300.png 223w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig2b.png 295w\" sizes=\"auto, (max-width: 223px) 100vw, 223px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"223\" height=\"300\" src=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig2c-223x300.png\" alt=\"\" class=\"wp-image-147\" srcset=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig2c-223x300.png 223w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig2c.png 295w\" sizes=\"auto, (max-width: 223px) 100vw, 223px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-text-align-center has-black-color has-text-color has-link-color wp-elements-1faa5ae55bf92984f7b080f24f388392 wp-block-paragraph\">Figura&nbsp;2:&nbsp;im\u00e1genes RGB de las c\u00e1maras.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"223\" height=\"300\" src=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig3a-223x300.png\" alt=\"\" class=\"wp-image-149\" srcset=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig3a-223x300.png 223w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig3a.png 295w\" sizes=\"auto, (max-width: 223px) 100vw, 223px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"223\" height=\"300\" src=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig3b-223x300.png\" alt=\"\" class=\"wp-image-150\" srcset=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig3b-223x300.png 223w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig3b.png 295w\" sizes=\"auto, (max-width: 223px) 100vw, 223px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"223\" height=\"300\" src=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig3c-223x300.png\" alt=\"\" class=\"wp-image-151\" srcset=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig3c-223x300.png 223w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig3c.png 295w\" sizes=\"auto, (max-width: 223px) 100vw, 223px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-text-align-center has-black-color has-text-color has-link-color wp-elements-a905a956aba19dc56689b3514a9a4e1d wp-block-paragraph\">Figura&nbsp;3: im\u00e1genes&nbsp;de profundidad&nbsp;de las c\u00e1maras.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color wp-elements-3ddda2e640d6aee28b24aa63d26ceb8c\"><strong>Etiquetado<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-f1738ba845bd4ac8a90d6bee7ba756d4 wp-block-paragraph\">Adem\u00e1s de la captura de datos visuales con las c\u00e1maras RGBD, se realiz\u00f3 un proceso adicional de etiquetado minucioso que a\u00f1ade un nivel de detalle crucial a la informaci\u00f3n obtenida. Este proceso implic\u00f3 la asignaci\u00f3n de coordenadas tridimensionales (3D) a cada una de las 6 articulaciones del brazo rob\u00f3tico, generando un conjunto completo de 18 etiquetas. Para proporcionar una visi\u00f3n m\u00e1s clara de este procedimiento, es importante destacar que estas etiquetas constan de tres valores que representan la posici\u00f3n en tres ejes diferentes: [x, y, z] para cada una de las articulaciones.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"918\" height=\"194\" src=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/tabla1.png\" alt=\"\" class=\"wp-image-152\" srcset=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/tabla1.png 918w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/tabla1-300x63.png 300w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/tabla1-768x162.png 768w\" sizes=\"auto, (max-width: 918px) 100vw, 918px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-black-color has-text-color has-link-color wp-elements-308f1c75abda975f3fe4de934c55fc1d wp-block-paragraph\">Tabla 1: estructura de datos etiquetados.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color wp-elements-d75f481eec7f70c388fcb7b25c6cd9f7\"><strong>Estructura Propuesta<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-d078af2fb67bf38b9494f67f0f7c61eb wp-block-paragraph\">El modelo propuesto consiste en una red neuronal convolucional (CNN) para procesar las im\u00e1genes de las 3 c\u00e1maras RGBD. Como columna vertebral de la CNN se utiliza la arquitectura ResNet50 para extraer un vector de caracter\u00edsticas de alta dimensi\u00f3n a partir de las im\u00e1genes de entrada.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"955\" height=\"302\" src=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig4.png\" alt=\"\" class=\"wp-image-153\" srcset=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig4.png 955w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig4-300x95.png 300w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig4-768x243.png 768w\" sizes=\"auto, (max-width: 955px) 100vw, 955px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-black-color has-text-color has-link-color wp-elements-4569cfc6709260d1e74032a8af60ed82 wp-block-paragraph\">Figura 4: sistema propuesto para la estimaci\u00f3n de la pose del efector final.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-f880b1f2d9bc102fa72db9730290ee04 wp-block-paragraph\">Luego, este vector de caracter\u00edsticas se pasa a trav\u00e9s de una cascada de redes neuronales totalmente conectadas, donde cada red predice las coordenadas 3D [x, y, z] de una de las articulaciones del brazo rob\u00f3tico. En total se tienen 6 redes neuronales totalmente conectadas en cascada, una para cada articulaci\u00f3n.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-761d920d1acab6cdd01b13d2e560e431 wp-block-paragraph\">Se compararon 3 variantes de este enfoque:<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-e8cb629512cf0ef54dd921b49ced4d06 wp-block-paragraph\"><strong>L\u00ednea base:<\/strong>&nbsp;Cada red neuronal totalmente conectada recibe \u00fanicamente el vector de caracter\u00edsticas extra\u00eddo por ResNet50. No hay paso de informaci\u00f3n entre las redes.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-107ece56b6ac24275805b5b04f11b60a wp-block-paragraph\"><strong>Cascada:<\/strong>&nbsp;Cada red neuronal no solo recibe el vector de ResNet50, sino tambi\u00e9n las salidas (coordenadas 3D) de la red inmediatamente anterior.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-67b7bf5dc8d9f849afdf53ed29dc3f93 wp-block-paragraph\"><strong>Cascada completa:<\/strong>&nbsp;Cada red recibe el vector de ResNet50 y las salidas de todas las redes anteriores en la cascada.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"998\" height=\"261\" src=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig5.png\" alt=\"\" class=\"wp-image-154\" srcset=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig5.png 998w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig5-300x78.png 300w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig5-768x201.png 768w\" sizes=\"auto, (max-width: 998px) 100vw, 998px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-black-color has-text-color has-link-color wp-elements-ec7351a3894cf21b54693c3663b414f2 wp-block-paragraph\">Figura&nbsp;5:&nbsp;CNN seguida de una estructura en cascada totalmente conectada.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"956\" height=\"395\" src=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig6.png\" alt=\"\" class=\"wp-image-155\" srcset=\"https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig6.png 956w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig6-300x124.png 300w, https:\/\/academia.utp.edu.co\/ia-e-industria\/files\/2026\/04\/fig6-768x317.png 768w\" sizes=\"auto, (max-width: 956px) 100vw, 956px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-black-color has-text-color has-link-color wp-elements-aa16dd064cc237ddf056717770dcb2e6 wp-block-paragraph\">Figura&nbsp;6:&nbsp;bloque totalmente conectado. Red Neuronal 1000-256-64-3.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-336e722ff70e0615d0b1107e43600f27 wp-block-paragraph\">La hip\u00f3tesis muestra que proporcionar a cada red las estimaciones previas de las articulaciones mejorar\u00eda el rendimiento al agregar informaci\u00f3n adicional relevante para cada predicci\u00f3n. El m\u00e9todo de cascada completa mostr\u00f3 el mejor desempe\u00f1o durante la validaci\u00f3n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color wp-elements-9662f4ef4cae0a1be119e479a9e91c12\"><strong>Resultados<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-3ff1e876c0a3cfb0be074c5e7b24f8fb wp-block-paragraph\">El m\u00e9todo de cascada completa, donde cada etapa recibe informaci\u00f3n de todas las etapas previas, obtuvo el menor error de validaci\u00f3n. Esto indica que proporcionar las estimaciones previas mejora el rendimiento del modelo. Visualmente tambi\u00e9n se observ\u00f3 una buena precisi\u00f3n de las predicciones en 3D.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color wp-elements-c3b08c368fd108225435060b75217471\"><strong>Bibtex<\/strong><\/h2>\n\n\n\n<pre class=\"wp-block-code has-black-color has-text-color has-link-color wp-elements-324e311ccef7c08b352b0a2b7ad3fe36\"><code>@article{ortegaKevin2023,\n\n  title={Seguimiento visual de un manipulador serial utilizando redes neuronales profundas},\n\n  author={Ortega, Kevin David},\n\n  year={2023},\n\n  school={Universidad Tecnol{\\'o}gica de Pereira}\n\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Autores: Kevin David Ortega Qui\u00f1ones, Byron S. Hern\u00e1ndez, Jorge I. Sep\u00falveda, Henry Medeiros, Germ\u00e1n Andr\u00e9s Holgu\u00edn Londo\u00f1o. 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