{"id":24334,"date":"2014-03-11T22:01:31","date_gmt":"2014-03-11T21:01:31","guid":{"rendered":"http:\/\/www.boscarol.com\/blog\/?p=24334"},"modified":"2014-03-20T22:23:32","modified_gmt":"2014-03-20T21:23:32","slug":"curva-di-risposta-tonale-cosiddetto-gamma-rec-709","status":"publish","type":"post","link":"http:\/\/www.boscarol.com\/blog\/?p=24334","title":{"rendered":"Curva di risposta tonale (cosiddetto &#8220;gamma&#8221;) Rec 709"},"content":{"rendered":"<p><strong><br \/>\nFormula diretta<\/strong><\/p>\n<p>La formula diretta fornisce i numeri P (cio\u00e8 R o G o B, con valori tra 0 \u00a0e 1) in termini del <strong>fattore di luminanza Y<\/strong>\u00a0(con valori tra 0 e 1) ed \u00e8 la seguente<\/p>\n<p style=\"padding-left: 30px;\"><tt>se Y &lt; 0.018 allora P = 4.5 * Y<br \/>\nse Y \u2265 0.018\u00a0allora P = 1.099 * Y<sup>1\/0.45<\/sup>\u00a0- 0.099<\/tt><\/p>\n<p><strong><br \/>\nFormula inversa<\/strong><\/p>\n<p>La formula inversa fornisce il\u00a0<strong>fattore di luminanza Y<\/strong>\u00a0(con valori tra 0 e 1) in termini di\u00a0<strong>numeri P<\/strong>\u00a0(con valori tra 0 e 1) dove P \u00e8 R o G o B ed \u00e8 la seguente<\/p>\n<p style=\"padding-left: 30px;\"><tt>se P &lt; 0.081 allora\u00a0Y = P \/ 4.5<br \/>\nse P \u2265 0.081 allora\u00a0Y = ((P + 0.099)\/1.099)<sup>1\/0.45<\/sup>\u00a0\u00a0<\/tt><\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" class=\"alignnone  wp-image-24376\" alt=\"TRC\" src=\"https:\/\/i2.wp.com\/www.boscarol.com\/blog\/wp-content\/uploads\/2014\/03\/SafariSnapz001.jpg?resize=641%2C542\" width=\"641\" height=\"542\" srcset=\"https:\/\/i2.wp.com\/www.boscarol.com\/blog\/wp-content\/uploads\/2014\/03\/SafariSnapz001.jpg?w=801 801w, https:\/\/i2.wp.com\/www.boscarol.com\/blog\/wp-content\/uploads\/2014\/03\/SafariSnapz001.jpg?resize=300%2C253 300w\" sizes=\"(max-width: 641px) 100vw, 641px\" data-recalc-dims=\"1\" \/><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Formula diretta La formula diretta fornisce i numeri P (cio\u00e8 R o G o B, con valori tra 0 \u00a0e 1) in termini del fattore di luminanza Y\u00a0(con valori tra 0 e 1) ed \u00e8 la seguente se Y &lt; 0.018 allora P = 4.5 * Y se Y \u2265 0.018\u00a0allora P = 1.099 * [&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":[1362],"tags":[208,1492,1053],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_shortlink":"https:\/\/wp.me\/pjoVH-6ku","jetpack_sharing_enabled":true,"jetpack_likes_enabled":false,"_links":{"self":[{"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/24334"}],"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=24334"}],"version-history":[{"count":6,"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/24334\/revisions"}],"predecessor-version":[{"id":24379,"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/24334\/revisions\/24379"}],"wp:attachment":[{"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=24334"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24334"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.boscarol.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24334"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}