The aim of this study to the evaluate the precision of the Red, Green, Blue (RGB) image analysis algorithm included in the TaurusWebs V2017® software for calculating the percentage of neutral detergent fiber (NDF) in the dry matter of grasses, from images of the grasslands taken by a drone with RGB camera. The results were compared with NDF values calculated with near infrared spectroscopy (NIRS). Forty-two samples were taken for NIRS: 18 from grasses from the high tropics in Cundinamarca: kikuyu (Pennisetum clandestinum), velvet grass (Holcus lanatus) and reed canarian grass (Phalaris arundinacea) and 24 from the lower tropics in Tolima, Colombia: pangola (Digitaria decumbens), para (Brachiaria mutica), Bermuda grass (Cynodon dactylon) and silver grass (Bothriochloa pertusa). The results were compared against 180 evaluations made with the algorithm of the images of the same grasses whe...

The aim of this study to the evaluate the precision of the Red, Green, Blue (RGB) image analysis algorithm included in the TaurusWebs V2017® software for calculating the percentage of neutral detergent fiber (NDF) in the dry matter of grasses, from images of the grasslands taken by a drone with RGB camera. The results were compared with NDF values calculated with near infrared spectroscopy (NIRS). Forty-two samples were taken for NIRS: 18 from grasses from the high tropics in Cundinamarca: kikuyu (Pennisetum clandestinum), velvet grass (Holcus lanatus) and reed canarian grass (Phalaris arundinacea) and 24 from the lower tropics in Tolima, Colombia: pangola (Digitaria decumbens), para (Brachiaria mutica), Bermuda grass (Cynodon dactylon) and silver grass (Bothriochloa pertusa). The results were compared against 180 evaluations made with the algorithm of the images of the same grasses whe...

El objetivo del presente trabajo fue comparar los resultados obtenidos mediante el algoritmo de análisis de imágenes RGB - 2ARGB®- desarrollado para el cálculo de macrominerales, frente a los obtenidos con la técnica de espectroscopía de inducción de plasma de argón -EIP-. En la prueba se midió el contenido de cinco macrominerales, calcio (Ca), fósforo (P), potasio (K), magnesio (Mg) y azufre (S) en la materia seca de siete especies de gramíneas tropicales en tres pisos térmicos en Colombia. Para la estimación de los macrominerales a través del algoritmo se empleó un dron Dji Mavic Mini 1 con cámara 2.7 K, HD-RGB, usada como sensor remoto a 20 m de altura. Se tomaron imágenes de las mismas parcelas que se analizaron con la técnica estándar de EIP del laboratorio de Agrosavia Tibaitatá, Colombia. La prueba estadística de comparación de medianas de Wilcoxon no encontr...