{"id":9704,"date":"2015-01-04T13:44:09","date_gmt":"2015-01-04T18:44:09","guid":{"rendered":"http:\/\/blog.espol.edu.ec\/ccpg1001\/?p=9704"},"modified":"2026-04-05T18:11:15","modified_gmt":"2026-04-05T23:11:15","slug":"s2eva2014ti_t3-imagen-rgb-a-gris","status":"publish","type":"post","link":"https:\/\/blog.espol.edu.ec\/algoritmos101\/fp-s2eva20\/s2eva2014ti_t3-imagen-rgb-a-gris\/","title":{"rendered":"s2Eva2014TI_T3 Imagen RGB a gris"},"content":{"rendered":"\n<p><strong>Ejercicio<\/strong>: <a href=\"https:\/\/blog.espol.edu.ec\/algoritmos101\/fp-2eva20\/2eva2014ti_t3-imagen-rgb-a-gris\/\" data-type=\"post\" data-id=\"3019\">2Eva2014TI_T3 Imagen RGB a gris<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Algoritmo en Python<\/h2>\n\n\n\n<p>continuaci\u00f3n del tema 2, soluci\u00f3n propuesta en Python:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: python; title: ; notranslate\" title=\"\">\n# ICM00794-Fundamentos de Computaci\u00f3n - FCNM-ESPOL\n# 2Eva_IT2014_T2 Funci\u00f3n color RGB a gris\n# propuesta: edelros@espol.edu.ec\n\nimport numpy as np\n\ndef convertirgris(RGB):\n    rojo  = RGB&#x5B;0]\n    verde = RGB&#x5B;1]\n    azul  = RGB&#x5B;2]\n\n    # Mezcla colores\n    gris = 0.2989*rojo + 0.5870*verde + 0.1140*azul\n    gris = int(gris)\n\n    if (rojo&gt;255 or verde&gt;255 or azul&gt;255):\n        gris = -1\n    # Tarea: verificar para colores &lt;0\n    \n    return(gris)\n\n# 2Eva_IT2014_T3 Imagen RGB a gris\ndef fotoagris(imagen):\n    color,n,m   = np.shape(imagen)\n    blanconegro = np.zeros(shape=(n,m),dtype=int)\n\n    # por cada pixel\n    fila = 0\n    while not(fila&gt;=n):\n        columna = 0\n        while not(columna&gt;=m):\n            rojo  = imagen&#x5B;0,fila,columna]\n            verde = imagen&#x5B;1,fila,columna]\n            azul  = imagen&#x5B;2,fila,columna]\n            # para convertir\n            RGB  = &#x5B;rojo,verde,azul]\n            gris = convertirgris(RGB)\n            # poner el punto en gris\n            blanconegro&#x5B;fila,columna] = gris\n\n            columna = columna + 1\n        fila = fila + 1\n\n    return(blanconegro)\n<\/pre><\/div>\n\n\n<p>Ejemplo de ejecuci\u00f3n. Se proporciona la imagen como aun arreglo[color,fila,columna]<\/p>\n\n\n\n<p>Puede copiar los valores de imagen y pegarlo en la linea de instrucci\u00f3n&gt;&gt;&gt;<\/p>\n\n\n\n<p>Luego invocar a la funci\u00f3n fotoagris(imagen)<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&gt;&gt;&gt;imagen=np.array(&#091;&#091;&#091;12, 27, 42, 46, 74],\n        &#091; 3, 21, 33, 48, 67],\n        &#091; 5, 18,  0, 57, 73],\n        &#091; 6, 25, 31, 52, 69],\n        &#091;13, 24, 40, 54, 64]],\n\n       &#091;&#091;13, 26, 40, 46, 66],\n        &#091;15, 23, 45, 55, 62],\n        &#091; 3, 22,  0, 48, 70],\n        &#091; 6, 24, 39, 58, 68],\n        &#091; 8, 29, 35, 56, 72]],\n\n       &#091;&#091; 5, 28, 37, 58, 64],\n        &#091; 7, 24, 34, 48, 75],\n        &#091; 9, 17,  0, 50, 62],\n        &#091;12, 30, 43, 56, 68],\n        &#091; 4, 26, 45, 49, 74]]])\n&gt;&gt;&gt; fotoagris(imagen)\narray(&#091;&#091;11, 26, 40, 47, 68],\n       &#091;10, 22, 40, 52, 64],\n       &#091; 4, 20,  0, 50, 69],\n       &#091; 6, 24, 37, 55, 68],\n       &#091; 9, 27, 37, 54, 69]])<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Ejercicio: 2Eva2014TI_T3 Imagen RGB a gris Algoritmo en Python continuaci\u00f3n del tema 2, soluci\u00f3n propuesta en Python: Ejemplo de ejecuci\u00f3n. Se proporciona la imagen como aun arreglo[color,fila,columna] Puede copiar los valores de imagen y pegarlo en la linea de instrucci\u00f3n&gt;&gt;&gt; Luego invocar a la funci\u00f3n fotoagris(imagen)<\/p>\n","protected":false},"author":8043,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"wp-custom-template-entrada-fp-ejemplos","format":"standard","meta":{"footnotes":""},"categories":[136],"tags":[58,157],"class_list":["post-9704","post","type-post","status-publish","format-standard","hentry","category-fp-s2eva20","tag-ejemplos-python","tag-fundamentos-programacion"],"_links":{"self":[{"href":"https:\/\/blog.espol.edu.ec\/algoritmos101\/wp-json\/wp\/v2\/posts\/9704","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.espol.edu.ec\/algoritmos101\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.espol.edu.ec\/algoritmos101\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.espol.edu.ec\/algoritmos101\/wp-json\/wp\/v2\/users\/8043"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.espol.edu.ec\/algoritmos101\/wp-json\/wp\/v2\/comments?post=9704"}],"version-history":[{"count":5,"href":"https:\/\/blog.espol.edu.ec\/algoritmos101\/wp-json\/wp\/v2\/posts\/9704\/revisions"}],"predecessor-version":[{"id":23700,"href":"https:\/\/blog.espol.edu.ec\/algoritmos101\/wp-json\/wp\/v2\/posts\/9704\/revisions\/23700"}],"wp:attachment":[{"href":"https:\/\/blog.espol.edu.ec\/algoritmos101\/wp-json\/wp\/v2\/media?parent=9704"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.espol.edu.ec\/algoritmos101\/wp-json\/wp\/v2\/categories?post=9704"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.espol.edu.ec\/algoritmos101\/wp-json\/wp\/v2\/tags?post=9704"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}