{"id":101740,"date":"2019-07-19T12:17:29","date_gmt":"2019-07-19T10:17:29","guid":{"rendered":"http:\/\/riverdi.com\/blog\/por-que-es-necesaria-la-correccion-gamma-incluso-en-las-pantallas-inteligentes\/"},"modified":"2024-05-20T11:22:22","modified_gmt":"2024-05-20T09:22:22","slug":"por-que-es-necesaria-la-correccion-gamma-incluso-en-las-pantallas-inteligentes","status":"publish","type":"post","link":"https:\/\/riverdi.com\/es\/blog\/por-que-es-necesaria-la-correccion-gamma-incluso-en-las-pantallas-inteligentes","title":{"rendered":"Por qu\u00e9 es necesaria la correcci\u00f3n gamma, incluso en las pantallas inteligentes"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Alternar tabla de contenidos\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #002175;color:#002175\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #002175;color:#002175\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/riverdi.com\/es\/blog\/por-que-es-necesaria-la-correccion-gamma-incluso-en-las-pantallas-inteligentes\/#Codificacion_gamma_descodificacion_gamma_compresion_expansion_%E2%80%93_%C2%BFque_es_que\" >Codificaci\u00f3n gamma, descodificaci\u00f3n gamma, compresi\u00f3n, expansi\u00f3n &#8211; \u00bfqu\u00e9 es qu\u00e9?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/riverdi.com\/es\/blog\/por-que-es-necesaria-la-correccion-gamma-incluso-en-las-pantallas-inteligentes\/#%C2%BFDebo_preocuparme_por_la_correccion_gamma_de_la_pantalla_en_mi_proyecto\" >\u00bfDebo preocuparme por la correcci\u00f3n gamma de la pantalla en mi proyecto?<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>Este <a href=\"https:\/\/riverdi.com\/category\/display-101\/\"><br \/>\n  <strong>Pantalla 101<\/strong><br \/>\n<\/a> explicar\u00e1 los conceptos b\u00e1sicos de la correcci\u00f3n gamma de la pantalla. Para ello tenemos que mostrar algunos antecedentes de la pantalla de correcci\u00f3n gamma se aplica con. Se reduce al procesamiento de se\u00f1ales que hay detr\u00e1s de la visualizaci\u00f3n de contenidos en m\u00f3dulos LCD.<\/p>\n<p>Curiosamente, empezaremos por la biolog\u00eda humana. Para ser exactos, los ojos.<\/p>\n<p>El ojo humano es un \u00f3rgano complicado. Merece la pena conocer algunos datos sobre c\u00f3mo procesa la informaci\u00f3n el ojo. La evoluci\u00f3n dio forma al ojo humano moderno durante miles de a\u00f1os. Hay muchos trucos para conseguir el mejor efecto posible. Un buen ejemplo es el hecho de que <strong>nuestros ojos no son muy sensibles a los cambios en las zonas de color claro, pero pueden detectar muy f\u00e1cilmente los cambios en un entorno oscuro<\/strong>.<\/p>\n<p><a href=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/07\/figure-1.jpg\"><img decoding=\"async\" class=\"wp-image-7956 size-full aligncenter\" src=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/07\/figure-1.jpg\" alt=\"\" width=\"700\" height=\"174\"><\/a><\/p>\n<p>La diferencia de emisi\u00f3n de energ\u00eda luminosa entre los escalones (barras) cambia constantemente de izquierda a derecha.<\/p>\n<p><a href=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/07\/figure-2.jpg\"><img decoding=\"async\" class=\"wp-image-7955 size-full aligncenter\" src=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/07\/figure-2.jpg\" alt=\"\" width=\"700\" height=\"174\"><\/a><\/p>\n<p>\u00bfParece m\u00e1s uniforme la segunda imagen?<\/p>\n<p>Claro que s\u00ed.<\/p>\n<p>\u00bfPor qu\u00e9?<\/p>\n<p>La respuesta est\u00e1 en nuestros ojos. La <strong>respuesta de los ojos humanos a la intensidad de la luz no es lineal<\/strong>. Por eso, la segunda imagen (Fig. 2), en la que el cambio sigue una relaci\u00f3n de ley de potencias, se percibe como m\u00e1s uniforme.<\/p>\n<p>Debido a este efecto, necesitamos la <strong>transferencia gamma<\/strong> de la pantalla.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Codificacion_gamma_descodificacion_gamma_compresion_expansion_%E2%80%93_%C2%BFque_es_que\"><\/span><strong>Codificaci\u00f3n gamma, descodificaci\u00f3n gamma, compresi\u00f3n, expansi\u00f3n <\/strong><strong>&#8211; \u00bfqu\u00e9 es qu\u00e9?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Hay muchas expresiones relacionadas con la pantalla de correcci\u00f3n gamma, as\u00ed que vamos a aclarar algunas de ellas:<\/p>\n<ul>\n<li>La <strong>codificaci\u00f3n gamma<\/strong> (tambi\u00e9n compresi\u00f3n gamma) es el proceso de convertir valores de espacio lineal a gamma.<\/li>\n<li>La <strong>descodificaci\u00f3n gamma<\/strong> (tambi\u00e9n expansi\u00f3n gamma) es inversa al proceso anterior. Es el proceso de conversi\u00f3n de valores espaciales a lineales.<\/li>\n<\/ul>\n<p>Mira la trama:<\/p>\n<p><a href=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/07\/gamma-correction-1.jpg\"><img decoding=\"async\" class=\"wp-image-7958 size-full aligncenter\" src=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/07\/gamma-correction-1.jpg\" alt=\"\" width=\"388\" height=\"379\"><\/a><\/p>\n<p><em>     <span style=\"color: #808080\">rojo &#8211; correcci\u00f3n gamma de la pantalla<br \/>\n<\/span><\/em><\/p>\n<p><span style=\"color: #808080\"><em>  amarillo &#8211; funci\u00f3n lineal de la luminosidad<\/em><\/span><\/p>\n<p>Los tonos individuales de los canales RGB no cambian seg\u00fan un valor fijo, sino que se muestran seg\u00fan una curva que es una funci\u00f3n de potencia.<\/p>\n<p>Si un color se visualiza con la funci\u00f3n amarilla (lineal) (v\u00e9ase la imagen anterior), se perder\u00e1n muchos detalles de las zonas oscuras. Tampoco habr\u00eda forma de notar las diferencias en los colores claros.<\/p>\n<p>La correcci\u00f3n gamma de la pantalla nos permite ajustar el hardware para lograr la mejor recepci\u00f3n visual.<\/p>\n<p><a href=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/07\/linear-raw-image.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-7953 size-full\" src=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/07\/linear-raw-image.jpg\" alt=\"\" width=\"422\" height=\"290\"><\/a> <a href=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/07\/gamma-correction-image.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-7954 size-full\" src=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/07\/gamma-correction-image.jpg\" alt=\"\" width=\"422\" height=\"290\"><\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"%C2%BFDebo_preocuparme_por_la_correccion_gamma_de_la_pantalla_en_mi_proyecto\"><\/span>\u00bfDebo preocuparme por la correcci\u00f3n gamma de la pantalla en mi proyecto?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Esperamos que tanta f\u00edsica no le haya echado para atr\u00e1s.<\/p>\n<p>No te preocupes, la correcci\u00f3n gamma de la pantalla ya est\u00e1 aplicada en el controlador LCD. As\u00ed que el problema de la percepci\u00f3n de la imagen ya est\u00e1 resuelto.<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>En este art\u00edculo de Display 101, nos gustar\u00eda mostrarle algunos antecedentes del procesamiento de se\u00f1ales que hay detr\u00e1s de la visualizaci\u00f3n de contenidos en m\u00f3dulos LCD y, en resumen, explicarle la correcci\u00f3n gamma.<\/p>\n","protected":false},"author":19,"featured_media":114124,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"categories":[787],"tags":[939,940,821],"class_list":["post-101740","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pantalla-101","tag-correccion-gamma","tag-luz","tag-pantalla-101"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Por qu\u00e9 es necesaria la correcci\u00f3n gamma, incluso en las pantallas inteligentes - 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