{"id":88,"date":"2019-11-21T17:44:49","date_gmt":"2019-11-21T15:44:49","guid":{"rendered":"http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/?page_id=88"},"modified":"2020-02-20T16:24:40","modified_gmt":"2020-02-20T14:24:40","slug":"1-2-llum-i-color","status":"publish","type":"page","link":"http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/1-2-llum-i-color\/","title":{"rendered":"1.2. Llum i color"},"content":{"rendered":"<p>Hi ha una relaci\u00f3 directa entre el color, la llum i la percepci\u00f3 de la imatge. Isaac Newton (1643-1727) va ser qui en va descobrir les seves bases cient\u00edfiques quan va relacionar la llum blanca i la seva descomposici\u00f3 en els diferents colors i quan va definir el negre com l&#8217;abs\u00e8ncia de llum. Encara haur\u00e0 de passar un segle, a mitjan segle <span class=\"roman\">xix<\/span> (1865), perqu\u00e8 James Clerk Maxwell descrigui que la llum \u00e9s una ona electromagn\u00e8tica composta per oscil\u00b7lacions de camps el\u00e8ctrics i magn\u00e8tics.<\/p>\n<figure id=\"attachment_618\" aria-describedby=\"caption-attachment-618\" style=\"width: 1026px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" class=\"wp-image-618 size-full\" src=\"http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/wp-content\/uploads\/sites\/18\/2020\/02\/1.png\" alt=\"\" width=\"1026\" height=\"428\" srcset=\"http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/wp-content\/uploads\/sites\/18\/2020\/02\/1.png 1026w, http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/wp-content\/uploads\/sites\/18\/2020\/02\/1-300x125.png 300w, http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/wp-content\/uploads\/sites\/18\/2020\/02\/1-768x320.png 768w, http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/wp-content\/uploads\/sites\/18\/2020\/02\/1-1024x427.png 1024w\" sizes=\"(max-width: 1026px) 100vw, 1026px\" \/><figcaption id=\"caption-attachment-618\" class=\"wp-caption-text\">Figura 1. La percepci\u00f3 del color<\/figcaption><\/figure>\n<p>Fins ben avan\u00e7at el segle <span class=\"roman\">xx<\/span> la imatge estava basada en l&#8217;\u00fas de la mat\u00e8ria i els pigments \u2013s\u00edntesi subtractiva del color\u2013 per\u00f2, amb l&#8217;arribada de la tecnologia digital i el desenvolupament dels programaris d&#8217;infografia, la imatge ha passat a estar profundament associada a la s\u00edntesi additiva del color, la que treballa a partir de la descomposici\u00f3 de la llum, ja que la visi\u00f3 de la imatge digital es produeix en un mitj\u00e0 definit per la llum.<\/p>\n<div id=\"gtx-trans\" style=\"position: absolute; left: 179px; top: 616.922px;\">\n<div class=\"gtx-trans-icon\"><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Hi ha una relaci\u00f3 directa entre el color, la llum i la percepci\u00f3 de la imatge. Isaac Newton (1643-1727) va ser qui en va descobrir les seves bases cient\u00edfiques quan va relacionar la llum blanca i la seva descomposici\u00f3 en els diferents colors i quan va definir el negre com l&#8217;abs\u00e8ncia de llum. Encara haur\u00e0 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inline_featured_image":false},"acf":[],"_links":{"self":[{"href":"http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/wp-json\/wp\/v2\/pages\/88"}],"collection":[{"href":"http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/wp-json\/wp\/v2\/comments?post=88"}],"version-history":[{"count":7,"href":"http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/wp-json\/wp\/v2\/pages\/88\/revisions"}],"predecessor-version":[{"id":621,"href":"http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/wp-json\/wp\/v2\/pages\/88\/revisions\/621"}],"wp:attachment":[{"href":"http:\/\/disseny-test.uoc.edu\/materials\/taller-color\/wp-json\/wp\/v2\/media?parent=88"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}