{"id":11726,"date":"2024-09-10T22:35:26","date_gmt":"2024-09-10T19:35:26","guid":{"rendered":"https:\/\/global.tab-tv.com\/sk\/?p=11726"},"modified":"2024-09-10T22:35:28","modified_gmt":"2024-09-10T19:35:28","slug":"co-je-presnost-farieb-televizora","status":"publish","type":"post","link":"https:\/\/global.tab-tv.com\/sk\/co-je-presnost-farieb-televizora\/","title":{"rendered":"\u010co je presnos\u0165 farieb telev\u00edzora?"},"content":{"rendered":"\n

Presnos\u0165 farieb je d\u00f4le\u017eit\u00e1 pre kvalitu obr\u00e1zku na telev\u00edzore. Ukazuje, ako presne v\u00e1\u0161 telev\u00edzor reprodukuje farby v porovnan\u00ed so skuto\u010dn\u00fdm \u017eivotom. Aj ke\u010f drobn\u00e9 odch\u00fdlky m\u00f4\u017eu by\u0165 prehliadnut\u00e9, v\u00fdrazn\u00e9 nepresnosti m\u00f4\u017eu by\u0165 ru\u0161iv\u00e9. Av\u0161ak, mali by ste vedie\u0165, \u017ee \u017eiadny telev\u00edzor nedok\u00e1\u017ee dosiahnu\u0165 dokonal\u00fa reprodukciu farieb.<\/p>\n\n\n\n

Vysvetlenie presnosti farieb<\/strong><\/h2>\n\n\n\n

Presnos\u0165 farieb meria, ako presne displej reprodukuje farby v porovnan\u00ed s referen\u010dn\u00fdmi alebo o\u010dak\u00e1van\u00fdmi hodnotami. Jednoducho povedan\u00e9, meria, ako \u201espr\u00e1vne\u201c a \u201erealisticky\u201c farby na obrazovke vyzeraj\u00fa v porovnan\u00ed s ich p\u00f4vodn\u00fdmi alebo \u0161tandardizovan\u00fdmi verziami.
Pr\u00edklad nepresnej reprodukcie farieb:<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

Modern\u00e9 telev\u00edzory, najm\u00e4 modely strednej a vy\u0161\u0161ej triedy, m\u00f4\u017eu by\u0165 \u010dasto kalibrovan\u00e9 na dosiahnutie takmer dokonal\u00fdch farieb. Av\u0161ak, nie v\u017edy budete chcie\u0165 vykon\u00e1va\u0165 kalibr\u00e1ciu sami. V\u00e4\u010d\u0161ina pou\u017e\u00edvate\u013eov o\u010dak\u00e1va dobr\u00fa presnos\u0165 farieb pri k\u00fape a in\u0161tal\u00e1cii zariadenia, preto je d\u00f4le\u017eit\u00e9 venova\u0165 pozornos\u0165 tejto nastaven\u00ed pri v\u00fdbere. Telev\u00edzory tie\u017e obsahuj\u00fa nastavenia, ktor\u00e9 umo\u017e\u0148uj\u00fa zmenu gama alebo farebn\u00e9ho t\u00f3nu, \u010d\u00edm sa upravuje reprodukcia farieb.<\/p>\n\n\n\n

Referen\u010dn\u00fd \u0161tandard<\/strong>: Aby bola farba pova\u017eovan\u00e1 za presn\u00fa, mus\u00ed existova\u0165 referen\u010dn\u00fd \u0161tandard \u2013 norma na porovnanie. Referenciou m\u00f4\u017ee by\u0165 fyzick\u00fd objekt (napr\u00edklad \u010derven\u00e9 jablko) na dostato\u010dne bl\u00edzke porovnanie, alebo priemyseln\u00fd digit\u00e1lny \u0161tandard farieb, vo\u010di ktor\u00e9mu sa zvy\u010dajne robia \u00fapravy.
Odch\u00fdlka<\/strong>: Ak sa jablko zobrazuje ako oran\u017eov\u00e9 namiesto \u010derven\u00e9ho na displeji, predstavuje to odch\u00fdlku od \u201eskuto\u010dnej\u201c farby, naz\u00fdvan\u00fa farebn\u00e1 chyba.
Pre\u010do je to d\u00f4le\u017eit\u00e9<\/strong>: Predstavte si, \u017ee upravujete fotografiu na obrazovke s nepresnou reprodukciou farieb. Tla\u010den\u00fd obr\u00e1zok m\u00f4\u017ee vyzera\u0165 v\u00fdrazne inak ne\u017e to, \u010do ste videli na monitore. Podobne, sledovanie filmu na obrazovke s nepresnou reprodukciou farieb m\u00f4\u017ee zmeni\u0165 vn\u00edmanie vizu\u00e1lneho obsahu.<\/p>\n\n\n\n

Ako in\u00e9 farebn\u00e9 parametre ovplyv\u0148uj\u00fa presnos\u0165 farieb?<\/strong><\/h2>\n\n\n\n

Farebn\u00fd gamut<\/h3>\n\n\n\n

Rozsah farieb, ktor\u00fd m\u00f4\u017ee displej reprodukova\u0165.
Tu je farebn\u00fd rozsah v RGB form\u00e1te; trojuholn\u00edky ukazuj\u00fa farebn\u00e9 gamuty Rec.709, DCI-P3 a Rec.2020:<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

\u0160ir\u0161\u00ed farebn\u00fd gamut umo\u017e\u0148uje displeju reprodukova\u0165 \u0161ir\u0161ie spektrum farieb. Av\u0161ak, len preto, \u017ee displej m\u00f4\u017ee zobrazova\u0165 viac farieb, neznamen\u00e1, \u017ee ich bude zobrazova\u0165 presne.
Ak displej tvrd\u00ed, \u017ee pokr\u00fdva 100% farebn\u00e9ho gamutu DCI-P3, ale m\u00e1 slab\u00fa presnos\u0165 farieb, farby v tomto gamute m\u00f4\u017eu nemusie\u0165 zodpoveda\u0165 referen\u010dn\u00fdm farb\u00e1m \u0161tandardu.<\/p>\n\n\n\n

Kontrast<\/h3>\n\n\n\n

Je dos\u0165 \u0165a\u017ek\u00e9 ho mera\u0165, ale v podstate ukazuje, ako s\u00fa svetl\u00e9 \u010dasti obrazu jasnej\u0161ie v porovnan\u00ed s tmav\u00fdmi \u010das\u0165ami.
Vy\u0161\u0161\u00ed kontrastn\u00fd pomer umo\u017e\u0148uje rozl\u00ed\u0161i\u0165 viac odtie\u0148ov medzi extr\u00e9mami, \u010do vedie k bohat\u0161\u00edm a detailnej\u0161\u00edm obrazom.
Ak je kontrastn\u00fd pomer slab\u00fd, jemn\u00e9 farebn\u00e9 rozdiely m\u00f4\u017eu by\u0165 straten\u00e9, \u010do ovplyvn\u00ed presnos\u0165 reprodukcie farieb. Napr\u00edklad, detaily v tieni tmavej sc\u00e9ny sa m\u00f4\u017eu spoji\u0165 do jedn\u00e9ho nejasn\u00e9ho blata.<\/p>\n\n\n\n

Farebn\u00e1 h\u013abka<\/h3>\n\n\n\n

Po\u010det bitov pou\u017eit\u00fdch na zobrazenie farby jedn\u00e9ho pixelu. Be\u017en\u00e9 h\u013abky s\u00fa 8-bitov\u00e9 (256 farieb), 10-bitov\u00e9 (1.024 farieb) a 12-bitov\u00e9 (4.096 farieb). Ke\u010f\u017ee na\u0161e oko dok\u00e1\u017ee zachyti\u0165 asi 10 mili\u00f3nov farieb, aj 8-bitov\u00e9 (pribli\u017ene 16 mili\u00f3nov farieb) je dostato\u010dn\u00e9.
Farebn\u00e1 h\u013abka ur\u010duje jemnos\u0165 zobrazenia farieb. Vy\u0161\u0161ie bitov\u00e9 h\u013abky umo\u017e\u0148uj\u00fa hlad\u0161ie prechody a gradienty, \u010d\u00edm sa zni\u017euj\u00fa efekty p\u00e1sikovania.
Displej s vy\u0161\u0161ou farebnou h\u013abkou dok\u00e1\u017ee presnej\u0161ie zobrazi\u0165 jemn\u00e9 farebn\u00e9 vari\u00e1cie. Napr\u00edklad z\u00e1pad slnka m\u00f4\u017ee vyzera\u0165 ako hladk\u00fd gradient na 10-bitovom displeji, ale zobrazuje vidite\u013en\u00e9 p\u00e1siky na 8-bitovom.<\/p>\n\n\n\n

Farebn\u00e1 teplota a presnos\u0165 farieb<\/h3>\n\n\n\n

Farebn\u00e1 teplota, meran\u00e1 v Kelvinoch (K), popisuje odtie\u0148 sveteln\u00e9ho zdroja na displeji. Je to spektrum, ktor\u00e9 sa pohybuje od tepl\u00fdch (\u010derven\u00fdch) a\u017e po chladn\u00e9 (modr\u00e9) odtiene.<\/p>\n\n\n\n

    \n
  • Tepl\u00e9 t\u00f3ny<\/strong> (n\u00edzke hodnoty Kelvina, 2700K \u2013 3500K): Tieto t\u00f3ny pripom\u00ednaj\u00fa svetlo z \u017eiaroviek s vl\u00e1knom, poskytuj\u00face \u00fatulnej\u0161ie a pohodlnej\u0161ie vizu\u00e1lne z\u00e1\u017eitky.<\/li>\n\n\n\n
  • Chladn\u00e9 t\u00f3ny<\/strong> (vysok\u00e9 hodnoty Kelvina, 5500K \u2013 6500K): Tieto t\u00f3ny pripom\u00ednaj\u00fa denn\u00e9 svetlo, poskytuj\u00fac ostrej\u0161ie a bdel\u0161ie vizu\u00e1lne prostredie.<\/li>\n<\/ul>\n\n\n\n
    Farebn\u00e1 teplota<\/th>Popis<\/th><\/tr><\/thead>
    < 2700K<\/td>Ultra-Tepeln\u00e9<\/td><\/tr>
    2700K \u2013 3500K<\/td>Tepeln\u00e9<\/td><\/tr>
    3500K \u2013 4500K<\/td>Neutr\u00e1ln\u00e9<\/td><\/tr>
    4500K \u2013 5500K<\/td>Chladn\u00e9<\/td><\/tr>
    > 5500K<\/td>Ultra-Chladn\u00e9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    Presnos\u0165 farieb a typ panela<\/strong><\/h2>\n\n\n\n

    Typ panela hr\u00e1 ve\u013ek\u00fa \u00falohu v kvalite obrazu a najm\u00e4 v kvalite reprodukcie farieb. L\u00edder v tejto oblasti s\u00fa OLED panely. \u010co sa t\u00fdka LED obrazoviek, v\u0161etko z\u00e1vis\u00ed od kvality pou\u017eit\u00fdch materi\u00e1lov a v\u00fdrobnej technol\u00f3gie. Existuj\u00fa LED panely n\u00edzkej kvality, nez\u00e1le\u017e\u00ed na tom, \u010di s\u00fa vyroben\u00e9 technol\u00f3giou IPS alebo VA. Existuj\u00fa LED panely vyroben\u00e9 na zastaran\u00fdch link\u00e1ch s lacn\u00fdmi matricami, ktor\u00e9 maj\u00fa priemern\u00fa reprodukciu farieb, a existuj\u00fa panely vyroben\u00e9 s kvantov\u00fdmi bodmi, tzv. QLED displeje, ktor\u00e9 m\u00f4\u017eu ma\u0165 ve\u013emi dobr\u00fa kvalitu reprodukcie farieb.<\/p>\n\n\n\n

    Ovplyv\u0148uje HDR presnos\u0165 farieb?<\/strong><\/h2>\n\n\n\n

    HDR m\u00f4\u017ee v\u00fdrazne ovplyvni\u0165 presnos\u0165 farieb na telev\u00edzoroch. HDR je technol\u00f3gia, ktor\u00e1 zlep\u0161uje vizu\u00e1lny z\u00e1\u017eitok roz\u0161\u00edren\u00edm rozsahu jasnosti, kontrastu a farieb v porovnan\u00ed s obsahom \u0161tandardn\u00e9ho dynamick\u00e9ho rozsahu (SDR). Hoci HDR m\u00f4\u017ee zlep\u0161i\u0165 celkov\u00fa vizu\u00e1lnu kvalitu, tie\u017e prin\u00e1\u0161a nov\u00e9 v\u00fdzvy a \u00favahy t\u00fdkaj\u00face sa presnosti farieb.<\/p>\n\n\n\n

    \"\"<\/figure>\n\n\n\n

    HDR obsah \u010dasto vyu\u017e\u00edva \u0161ir\u0161\u00ed farebn\u00fd gamut, bli\u017e\u0161ie k DCI-P3 alebo dokonca nad n\u00edm, ale \u017eiadny s\u00fa\u010dasn\u00fd model telev\u00edzora nem\u00f4\u017ee dosiahnu\u0165 farebn\u00fd gamut Rec. 2020 v porovnan\u00ed so \u0161tandardnou sRGB farebnou gamou pou\u017eitou pre SDR obsah.
    Tento roz\u0161\u00edren\u00fd farebn\u00fd gamut umo\u017e\u0148uje \u017eiv\u0161ie a s\u00fdtej\u0161ie farby, ktor\u00e9 lep\u0161ie napodob\u0148uj\u00fa farby re\u00e1lneho sveta. Av\u0161ak, aby sa udr\u017eala presn\u00e1 reprodukcia farieb, telev\u00edzor mus\u00ed by\u0165 schopn\u00fd spr\u00e1vne reprodukova\u0165 tieto roz\u0161\u00edren\u00e9 farebn\u00e9 rozsahy.<\/p>\n\n\n\n

    Z\u00e1ver<\/strong><\/h2>\n\n\n\n

    Presnos\u0165 farieb telev\u00edzora alebo monitora z\u00e1vis\u00ed od mnoh\u00fdch faktorov, od kvality samotn\u00e9ho panela a\u017e po softv\u00e9r na spracovanie obrazu telev\u00edzora alebo monitora. V skuto\u010dnosti \u017eiadny rozpo\u010dtov\u00fd alebo stredne n\u00e1kladn\u00fd telev\u00edzor alebo monitor nem\u00f4\u017ee poskytn\u00fa\u0165 reprodukciu farieb, ktor\u00e1 sp\u013a\u0148a \u0161tandard. Preto v\u00fdrobcovia telev\u00edzorov nikdy nehovoria o presnosti farieb, aj ke\u010f je telev\u00edzor vysokokvalitn\u00fd; najviac, \u010do sa m\u00f4\u017eete dozvedie\u0165, je, \u017ee pokr\u00fdva rozsah ur\u010dit\u00e9ho \u0161tandardu.
    Ke\u010f\u017ee OLED telev\u00edzory dok\u00e1\u017eu zobrazi\u0165 najpresnej\u0161ie farby, OLED telev\u00edzory Samsungu z roku 2024 maj\u00fa certifik\u00e1ciu od Pantone. Tu je, \u010do hovor\u00ed Samsung: \u201eObjavte \u010dist\u00fa \u010diernu, jasn\u00e9 biele a farby potvrden\u00e9 Pantone s OLED technol\u00f3giou.\u201c Ale to ma m\u00e4tie, preto\u017ee farby Pantone boli preva\u017ene vyvinut\u00e9 na tla\u010d a pou\u017e\u00edvaj\u00fa 4 alebo 7 farieb na vytvorenie farieb, zatia\u013e \u010do telev\u00edzory a monitory vytv\u00e1raj\u00fa farby zo 3 farieb. Tak\u017ee farba m\u00f4\u017ee zodpoveda\u0165 Pantone, ale neviem, \u010di bude zodpoveda\u0165 DCI-P3.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Presnos\u0165 farieb je d\u00f4le\u017eit\u00e1 pre kvalitu obr\u00e1zku na telev\u00edzore. Ukazuje, ako presne v\u00e1\u0161 telev\u00edzor reprodukuje farby v porovnan\u00ed so skuto\u010dn\u00fdm \u017eivotom. Aj ke\u010f drobn\u00e9 odch\u00fdlky m\u00f4\u017eu by\u0165 prehliadnut\u00e9, v\u00fdrazn\u00e9 nepresnosti m\u00f4\u017eu by\u0165 ru\u0161iv\u00e9. Av\u0161ak, mali by ste vedie\u0165, \u017ee \u017eiadny telev\u00edzor nedok\u00e1\u017ee dosiahnu\u0165 dokonal\u00fa reprodukciu farieb. Vysvetlenie presnosti farieb Presnos\u0165 farieb meria, ako presne displej […]<\/p>\n","protected":false},"author":1,"featured_media":11730,"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":[26],"tags":[87],"class_list":{"0":"post-11726","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-tv","8":"tag-technologia"},"_links":{"self":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/11726","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=11726"}],"version-history":[{"count":2,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/11726\/revisions"}],"predecessor-version":[{"id":11732,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/11726\/revisions\/11732"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/media\/11730"}],"wp:attachment":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/media?parent=11726"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/categories?post=11726"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/tags?post=11726"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}