Technol\u00f3gia vysok\u00e9ho dynamick\u00e9ho rozsahu (HDR) sp\u00f4sobila v polovici roka 2010 revol\u00faciu v sp\u00f4sobe zachyt\u00e1vania a zobrazovania vizu\u00e1lneho obsahu. Umo\u017e\u0148uje vytv\u00e1ra\u0165 \u00fa\u017easne \u017eiv\u00e9 fotografie a vide\u00e1 s vysokou vernos\u0165ou farieb a p\u00f4sobiv\u00fdm rozsahom kontrastov. HDR zabezpe\u010duje, \u017ee si najjasnej\u0161ie svetl\u00e1 aj najtmav\u0161ie tiene zachovaj\u00fa svoje detaily, \u010d\u00edm vn\u00e1\u0161a do obr\u00e1zkov a vide\u00ed \u017eivot a h\u013abku. \u010co presne je v\u0161ak s\u00fabor HDR a ako funguje?<\/p>\n\n\n\n
Obrazov\u00fd s\u00fabor HDR je \u0161pecializovan\u00fd form\u00e1t, ktor\u00fd uchov\u00e1va podstatne viac inform\u00e1ci\u00ed o jase a farb\u00e1ch ako \u0161tandardn\u00e9 obrazov\u00e9 s\u00fabory. Tieto s\u00fabory sa v\u0161ak zriedka pou\u017e\u00edvaj\u00fa v surovej podobe, preto\u017ee na spr\u00e1vne zobrazenie si vy\u017eaduj\u00fa pokro\u010dil\u00fd softv\u00e9r a \u0161pecializovan\u00fd hardv\u00e9r. V\u00e4\u010d\u0161ina webov\u00fdch prehliada\u010dov a z\u00e1kladn\u00fdch programov na prezeranie obr\u00e1zkov nedok\u00e1\u017ee otvori\u0165 s\u00fabory HDR a nie v\u0161etky zobrazovacie zariadenia s\u00fa schopn\u00e9 spracova\u0165 ich vysok\u00fa kvalitu. Na spr\u00e1vne zobrazenie obr\u00e1zkov HDR musia obrazovky podporova\u0165 farebn\u00fa h\u013abku 10 bitov alebo vy\u0161\u0161iu.<\/p>\n\n\n\n
Obr\u00e1zky HDR sa zvy\u010dajne vytv\u00e1raj\u00fa zmie\u0161an\u00edm viacer\u00fdch fotografi\u00ed tej istej sc\u00e9ny nasn\u00edman\u00fdch pri r\u00f4znych nastaveniach expoz\u00edcie. Tento proces kombinuje najlep\u0161ie detaily z preexponovan\u00fdch, podexponovan\u00fdch a vyv\u00e1\u017een\u00fdch z\u00e1berov do jedn\u00e9ho obrazu. Na tento \u00fa\u010del sa be\u017ene pou\u017e\u00edvaj\u00fa digit\u00e1lne fotoapar\u00e1ty so zabudovanou funkciou HDR alebo softv\u00e9r, ako napr\u00edklad Photomatix, Adobe Photoshop a Aurora HDR.<\/p>\n\n\n\n
V\u00fdsledkom je jeden obr\u00e1zok s roz\u0161\u00edren\u00fdm dynamick\u00fdm rozsahom, doplnen\u00fd o metad\u00e1ta s podrobn\u00fdmi inform\u00e1ciami o jase a kontraste r\u00f4znych \u010dast\u00ed obr\u00e1zka. Zjednodu\u0161ene povedan\u00e9, metad\u00e1ta HDR usmer\u0148uj\u00fa spracovanie obrazu a zabezpe\u010duj\u00fa, aby tmav\u00e9 oblasti dostali zv\u00fd\u0161en\u00fd jas a kontrast, zatia\u013e \u010do svetl\u00e9 oblasti sa upravia na jasnos\u0165. V\u00fdsledkom je jasn\u00fd a vizu\u00e1lne pr\u00ed\u0165a\u017eliv\u00fd obraz.<\/p>\n\n\n\n
Pou\u017e\u00edvanie metad\u00e1t HDR mo\u017eno prirovna\u0165 k vrstv\u00e1m pou\u017e\u00edvan\u00fdm v programe Photoshop. Umo\u017e\u0148uj\u00fa jemn\u00e9 \u00fapravy jednotliv\u00fdch \u010dast\u00ed obr\u00e1zka, \u010d\u00edm sa zvy\u0161uje jeho celkov\u00e1 kvalita. Fotografie HDR s\u00fa obzvl\u00e1\u0161\u0165 cenn\u00e9 pri \u010fal\u0161\u00edch \u00faprav\u00e1ch, ktor\u00e9 umo\u017e\u0148uj\u00fa vytv\u00e1ra\u0165 \u00fa\u017easn\u00e9 sn\u00edmky na profesion\u00e1lnej \u00farovni.<\/p>\n\n\n\n
Video HDR zvy\u0161uje z\u00e1\u017eitok zo sledovania t\u00fdm, \u017ee pon\u00faka dynamick\u00e9 a realistick\u00e9 obrazy. Vytv\u00e1ra sa pomocou \u0161pecializovan\u00fdch kamier, ktor\u00e9 s\u00fa\u010dasne zachyt\u00e1vaj\u00fa z\u00e1bery pri r\u00f4znych nastaveniach expoz\u00edcie. Tieto sn\u00edmky sa potom spoja do jednej sekvencie obohatenej o metad\u00e1ta HDR. Alternat\u00edvne sa video HDR m\u00f4\u017ee vytv\u00e1ra\u0165 pomocou softv\u00e9ru, ako je to mo\u017en\u00e9 vidie\u0165 vo videohr\u00e1ch alebo inom digit\u00e1lnom obsahu.<\/p>\n\n\n\n
Metad\u00e1ta vo videu HDR funguj\u00fa ako s\u00fabor pokynov pre zobrazovacie zariadenie, ktor\u00e9 ho informuj\u00fa o tom, ako m\u00e1 spracova\u0165 a zobrazi\u0165 jednotliv\u00e9 sn\u00edmky. Ke\u010f telev\u00edzor rozpozn\u00e1 sign\u00e1l HDR (\u010do si \u010dasto vy\u017eaduje zapnutie \u0161pecifick\u00e9ho nastavenia), jeho procesor vyu\u017e\u00edva tieto metad\u00e1ta na dynamick\u00e9 vytv\u00e1ranie sn\u00edmok. T\u00fdm sa zabezpe\u010d\u00ed, \u017ee ka\u017ed\u00e1 sn\u00edmka je optimalizovan\u00e1 z h\u013eadiska jasu, kontrastu a presnosti farieb, a nie \u017ee sa pren\u00e1\u0161an\u00fd obraz jednoducho zobraz\u00ed tak, ako je.<\/p>\n\n\n\n
Spracovanie HDR si vy\u017eaduje zna\u010dn\u00e9 zdroje a dodato\u010dn\u00fd v\u00fdkon – a\u017e o 30 % viac v pr\u00edpade telev\u00edzorov, najm\u00e4 t\u00fdch, ktor\u00e9 pou\u017e\u00edvaj\u00fa pokro\u010dil\u00e9 \u0161tandardy, ako je HDR10+. Ka\u017ed\u00e1 sn\u00edmka sa sprac\u00fava samostatne, v\u00fdsledkom \u010doho je vysokokvalitn\u00fd obraz s v\u00fdnimo\u010dn\u00fdmi detailmi a s\u00fdtos\u0165ou, ale zobrazenie videa si vy\u017eaduje ove\u013ea viac zdrojov ako \u0161tandardn\u00e9 spracovanie videa.<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Technol\u00f3gia vysok\u00e9ho dynamick\u00e9ho rozsahu (HDR) sp\u00f4sobila v polovici roka 2010 revol\u00faciu v sp\u00f4sobe zachyt\u00e1vania a zobrazovania vizu\u00e1lneho obsahu. Umo\u017e\u0148uje vytv\u00e1ra\u0165 \u00fa\u017easne \u017eiv\u00e9 fotografie a vide\u00e1 s vysokou vernos\u0165ou farieb a p\u00f4sobiv\u00fdm rozsahom kontrastov. HDR zabezpe\u010duje, \u017ee si najjasnej\u0161ie svetl\u00e1 aj najtmav\u0161ie tiene zachovaj\u00fa svoje detaily, \u010d\u00edm vn\u00e1\u0161a do obr\u00e1zkov a vide\u00ed \u017eivot a h\u013abku. \u010co […]<\/p>\n","protected":false},"author":1,"featured_media":501,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[86],"tags":[88],"class_list":{"0":"post-500","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-technologia","8":"tag-hdr"},"_links":{"self":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/500","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/comments?post=500"}],"version-history":[{"count":3,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/500\/revisions"}],"predecessor-version":[{"id":12359,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/500\/revisions\/12359"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/media\/501"}],"wp:attachment":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/media?parent=500"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/categories?post=500"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/tags?post=500"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}