{"id":6511,"date":"2008-12-26T19:55:54","date_gmt":"2008-12-26T17:55:54","guid":{"rendered":"http:\/\/www.boscarol.com\/blog\/?p=6511"},"modified":"2015-01-04T18:36:25","modified_gmt":"2015-01-04T17:36:25","slug":"melissa-rgb","status":"publish","type":"post","link":"http:\/\/www.boscarol.com\/blog\/?p=6511","title":{"rendered":"Melissa RGB (cio\u00e8 ProPhoto con la TRC di sRGB)"},"content":{"rendered":"<p>Melissa RGB non \u00e8 uno spazio colore &#8220;ufficiale&#8221; ma \u00e8 uno spazio &#8220;figlio&#8221; di <a href=\"http:\/\/www.boscarol.com\/blog\/?p=1630\" target=\"_blank\">ProPhoto<\/a> e di\u00a0<a href=\"http:\/\/www.boscarol.com\/blog\/?p=1589\" target=\"_blank\">sRGB<\/a>: da ProPhoto ha ereditato le coordinate colorimetriche dei tre primari R, G e B e del bianco mentre da sRGB ha ereditato la TRC (<em>tone response curve<\/em>, chiamata solitamente &#8220;gamma&#8221;). \u00c8 noto anche come &#8220;Bastard RGB&#8221;, con allusione alla sua discendenza.<\/p>\n<p>\u00c8 comunque uno spazio importante perch\u00e9 \u00e8 usato da Adobe Lightroom come spazio in cui viene costruito l&#8217;istogramma e vengono visualizzati i numeri RGB (in percentuale) dell&#8217;immagine.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-6512\" title=\"Melissa RGB\" src=\"https:\/\/i1.wp.com\/www.boscarol.com\/blog\/wp-content\/uploads\/2008\/12\/melissa.jpg?resize=268%2C300\" alt=\"Melissa RGB\" width=\"268\" height=\"300\" data-recalc-dims=\"1\" \/> <img loading=\"lazy\" class=\"alignnone size-full wp-image-18446\" title=\"Melissa RGB\" src=\"https:\/\/i1.wp.com\/www.boscarol.com\/blog\/wp-content\/uploads\/2008\/12\/pro2.jpg?resize=268%2C300\" alt=\"\" width=\"268\" height=\"300\" data-recalc-dims=\"1\" \/><\/p>\n<p>La TRC originale di ProPhoto \u00e8 un gamma 1.8 mentre la\u00a0<a href=\"http:\/\/www.boscarol.com\/blog\/?p=1589\" target=\"_self\">TRC di sRGB<\/a> \u00e8 simile a un gamma 2.2 ma non \u00e8 identica perch\u00e9 \u00e8 composto di due pezzi.<\/p>\n<p>Lo spazio prende il nome da Melissa Gaul, che fa parte del gruppo che ha creato Lightroom. Questa \u00e8 una citazione di Jeff Schewe:<\/p>\n<blockquote><p>&#8230; <em>it&#8217;s called Melissa RGB after Melissa Gaul, head of Q&amp;E for Lightroom. We all decided to call it Melissa RGB since there weren&#8217;t any color spaces named after women.<\/em><\/p><\/blockquote>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-6515\" style=\"border: 0px none;\" title=\"melissa-lightroom\" src=\"https:\/\/i0.wp.com\/www.boscarol.com\/blog\/wp-content\/uploads\/2008\/12\/melissa-lightroom.jpg?resize=499%2C252\" alt=\"melissa-lightroom\" width=\"499\" height=\"252\" srcset=\"https:\/\/i0.wp.com\/www.boscarol.com\/blog\/wp-content\/uploads\/2008\/12\/melissa-lightroom.jpg?w=624 624w, https:\/\/i0.wp.com\/www.boscarol.com\/blog\/wp-content\/uploads\/2008\/12\/melissa-lightroom.jpg?w=300 300w\" sizes=\"(max-width: 499px) 100vw, 499px\" data-recalc-dims=\"1\" \/><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Melissa RGB non \u00e8 uno spazio colore &#8220;ufficiale&#8221; ma \u00e8 uno spazio &#8220;figlio&#8221; di ProPhoto e di\u00a0sRGB: da ProPhoto ha ereditato le coordinate colorimetriche dei tre primari R, G e B e del bianco mentre da sRGB ha ereditato la TRC (tone response curve, chiamata solitamente &#8220;gamma&#8221;). \u00c8 noto anche come &#8220;Bastard RGB&#8221;, con allusione [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false},"categories":[107],"tags":[370,171,131],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_shortlink":"https:\/\/wp.me\/pjoVH-1H1","jetpack_sharing_enabled":true,"jetpack_likes_enabled":false,"_links":{"self":[{"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/6511"}],"collection":[{"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6511"}],"version-history":[{"count":18,"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/6511\/revisions"}],"predecessor-version":[{"id":25068,"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/6511\/revisions\/25068"}],"wp:attachment":[{"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6511"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6511"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6511"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}