{"id":95394,"date":"2022-06-23T09:43:13","date_gmt":"2022-06-23T07:43:13","guid":{"rendered":"https:\/\/xm.cz\/blog\/?p=95394"},"modified":"2022-06-23T09:43:13","modified_gmt":"2022-06-23T07:43:13","slug":"proc-108mpx-fotak-porizuje-12mpx-fotky-duvodem-je-pixel-binning","status":"publish","type":"post","link":"https:\/\/xm.cz\/blog\/proc-108mpx-fotak-porizuje-12mpx-fotky-duvodem-je-pixel-binning\/","title":{"rendered":"Pro\u010d 108Mpx fo\u0165\u00e1k po\u0159izuje 12Mpx fotky? D\u016fvodem je pixel binning"},"content":{"rendered":"<p>Rozli&#x161;en&#xED; fotoapar&#xE1;tu je v segmentu mobiln&#xED;ch telefon&#x16F; jedn&#xED;m z hojn&#x11B; prezentovan&#xFD;ch parametr&#x16F;. Jen&#x17E;e koup&#xED;te si mobil s rozli&#x161;en&#xED;m 108Mpx a n&#xE1;sledn&#x11B; zjist&#xED;te, &#x17E;e po&#x159;izuje sn&#xED;mky v rozli&#x161;en&#xED; 4080 &#xD7; 3072 obrazov&#xFD;ch bod&#x16F;, tedy 12 Mpx. Jak je to mo&#x17E;n&#xE9;? Odpov&#x11B;d&#xED; je technologie ozna&#x10D;ovan&#xE1; jako <b>pixel binning<\/b>.<\/p>\n<p>Za objektivem fotoapar&#xE1;tu va&#x161;eho mobiln&#xED;ho telefonu se skr&#xFD;v&#xE1; fotografick&#xFD; sn&#xED;ma&#x10D;. M&#x16F;&#x17E;ete si ho p&#x159;edstavit jako desti&#x10D;ku, na kter&#xE9; jsou v &#x159;&#xE1;dc&#xED;ch a sloupc&#xED;ch um&#xED;st&#x11B;n&#xE9; senzory schopn&#xE9; vn&#xED;mat barvu a jas (d&#xE1;le je budeme ozna&#x10D;ovat jako pixely). V p&#x159;&#xED;pad&#x11B; 108Mpx fotoapar&#xE1;tu se jich na relativn&#x11B; malou desti&#x10D;ku mus&#xED; vej&#xED;t 108 milion&#x16F;.<\/p>\n<h2>Pixel binning v praxi<\/h2>\n<p>Pokud po&#x159;izujete sn&#xED;mek, pak ka&#x17E;d&#xFD; bod sn&#xED;ma&#x10D;e zachyt&#xED; ur&#x10D;itou (malou) &#x10D;&#xE1;st sc&#xE9;ny. Budeme-li fotit v pln&#xE9;m rozli&#x161;en&#xED;, pak <b>z jednoho bodu sn&#xED;ma&#x10D;e dostaneme jeden bod v&#xFD;sledn&#xE9;ho obr&#xE1;zku<\/b>. Pot&#xE9; n&#xE1;sleduje softwarov&#xE9; zpracov&#xE1;n&#xED; a ulo&#x17E;en&#xED; fotografie ve form&#xE1;tu JPG do pam&#x11B;ti telefonu &#x10D;i na pam&#x11B;&#x165;ovou kartu.<\/p>\n<p>Vysok&#xE9; rozli&#x161;en&#xED; znamen&#xE1;, &#x17E;e je na sn&#xED;ma&#x10D; nutn&#xE9; um&#xED;stit odpov&#xED;daj&#xED;c&#xED; po&#x10D;et pixel&#x16F;, co&#x17E; p&#x159;i mal&#xE9; velikosti &#x10D;ipu znamen&#xE1; <b>nutnost jejich zmen&#x161;en&#xED;<\/b> a&#x17E; do velikosti mikrometr&#x16F;. D&#xED;ky v&#x11B;t&#x161;&#xED;mu po&#x10D;tu pixel&#x16F; na stejn&#xE9; fyzick&#xE9; plo&#x161;e je fotoapar&#xE1;t telefonu schopen l&#xE9;pe zobrazit jemn&#xE9; detaily, ale z&#xE1;rove&#x148; je t&#xED;m omezena jeho funk&#x10D;nost p&#x159;i zhor&#x161;en&#xFD;ch sv&#x11B;teln&#xFD;ch podm&#xED;nk&#xE1;ch.<\/p>\n<figure id=\"attachment_95397\" aria-describedby=\"caption-attachment-95397\" style=\"width: 1600px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Velikost-snimace-v-telefonu-Xiaomi-12-Pro.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-95397\" src=\"https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Velikost-snimace-v-telefonu-Xiaomi-12-Pro.png\" alt=\"Velikost sn&#xED;ma&#x10D;e v telefonu Xiaomi 12 Pro\" width=\"1600\" height=\"900\" srcset=\"https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Velikost-snimace-v-telefonu-Xiaomi-12-Pro.png 1600w, https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Velikost-snimace-v-telefonu-Xiaomi-12-Pro-300x169.png 300w, https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Velikost-snimace-v-telefonu-Xiaomi-12-Pro-1024x576.png 1024w, https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Velikost-snimace-v-telefonu-Xiaomi-12-Pro-768x432.png 768w, https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Velikost-snimace-v-telefonu-Xiaomi-12-Pro-1536x864.png 1536w, https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Velikost-snimace-v-telefonu-Xiaomi-12-Pro-50x28.png 50w, https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Velikost-snimace-v-telefonu-Xiaomi-12-Pro-192x107.png 192w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/a><figcaption id=\"caption-attachment-95397\" class=\"wp-caption-text\">Velikost sn&#xED;ma&#x10D;e v telefonu <a class=\"lar-automated-link\" href=\"https:\/\/xm.cz\/xiaomi-12-pro-5g-dual-sim_z19487\/\" target=\"_blank\">Xiaomi 12 Pro<\/a><\/figcaption><\/figure>\n<p>Pro&#x10D;? Jednodu&#x161;e proto, &#x17E;e <b>p&#x159;&#xED;li&#x161; mal&#xE9; pixely nedok&#xE1;&#x17E;ou zachytit tolik sv&#x11B;tla<\/b>. &#x10C;&#xED;m men&#x161;&#xED; je jeden pixel, t&#xED;m men&#x161;&#xED; plochu m&#xE1; pro zachycen&#xED; p&#x159;ich&#xE1;zej&#xED;c&#xED;ho sv&#x11B;tla. Za stejn&#xFD;ch podm&#xED;nek bude sn&#xED;ma&#x10D; s pixely o velikosti 0,8 &#x3BC;m po&#x159;izovat hor&#x161;&#xED; obr&#xE1;zky ne&#x17E; sn&#xED;ma&#x10D; s pixely o velikosti 1,2 &#x3BC;m.<\/p>\n<h2>V&#x11B;t&#x161;&#xED; je lep&#x161;&#xED;, ale nevejde se do mobilu<\/h2>\n<p>Obecn&#x11B; plat&#xED;, &#x17E;e <b>lep&#x161;&#xED; jsou velk&#xE9; pixely<\/b>, proto&#x17E;e v&#x11B;t&#x161;&#xED; pixel dok&#xE1;&#x17E;e zachytit v&#xED;ce sv&#x11B;tla ne&#x17E; men&#x161;&#xED;. Schopnost zachytit v&#xED;ce sv&#x11B;tla znamen&#xE1; lep&#x161;&#xED; kvalitu obrazu jak ve tmav&#xE9; hospod&#x11B;, tak za soumraku, kdy je nedostatek sv&#x11B;tla. Probl&#xE9;mem je, &#x17E;e sn&#xED;ma&#x10D;e fotoapar&#xE1;t&#x16F; v chytr&#xFD;ch telefonech mus&#xED; b&#xFD;t mal&#xE9;, aby se do nich v&#x16F;bec ve&#x161;ly.<\/p>\n<figure id=\"attachment_95396\" aria-describedby=\"caption-attachment-95396\" style=\"width: 739px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Vetsi-senzor-rovna-se-vice-detailu.jpeg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-95396\" src=\"https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Vetsi-senzor-rovna-se-vice-detailu.jpeg\" alt=\"V&#x11B;t&#x161;&#xED; senzor rovn&#xE1; se v&#xED;ce detail&#x16F;\" width=\"739\" height=\"415\" srcset=\"https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Vetsi-senzor-rovna-se-vice-detailu.jpeg 739w, https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Vetsi-senzor-rovna-se-vice-detailu-300x168.jpeg 300w, https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Vetsi-senzor-rovna-se-vice-detailu-50x28.jpeg 50w, https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Vetsi-senzor-rovna-se-vice-detailu-192x107.jpeg 192w\" sizes=\"auto, (max-width: 739px) 100vw, 739px\" \/><\/a><figcaption id=\"caption-attachment-95396\" class=\"wp-caption-text\">V&#x11B;t&#x161;&#xED; senzor rovn&#xE1; se v&#xED;ce detail&#x16F;<\/figcaption><\/figure>\n<p>Men&#x161;&#xED; sn&#xED;ma&#x10D; znamen&#xE1;, &#x17E;e pixely mus&#xED; b&#xFD;t tak&#xE9; men&#x161;&#xED;, tedy pokud nepou&#x17E;ijete m&#xE9;n&#x11B; pixel&#x16F; (tj. sn&#xED;ma&#x10D; s ni&#x17E;&#x161;&#xED;m rozli&#x161;en&#xED;m). Druh&#xFD;m p&#x159;&#xED;stupem je pou&#x17E;it&#xED; v&#x11B;t&#x161;&#xED;ho po&#x10D;tu pixel&#x16F; (tj. sn&#xED;ma&#x10D;e s vy&#x161;&#x161;&#xED;m rozli&#x161;en&#xED;m), ale budete muset bu&#x10F; zv&#x11B;t&#x161;it velikost sn&#xED;ma&#x10D;e, nebo pixely je&#x161;t&#x11B; v&#xED;ce zmen&#x161;it. Zmen&#x161;en&#xED; pixel&#x16F; m&#xE1; <b>nep&#x159;&#xED;zniv&#xFD; vliv na schopnosti sn&#xED;m&#xE1;n&#xED; p&#x159;i slab&#xE9;m osv&#x11B;tlen&#xED;<\/b>.<\/p>\n<p>P&#x159;edstavte si sn&#xED;ma&#x10D; fotoapar&#xE1;tu jako dv&#x16F;r a pixely jako kbel&#xED;ky, kter&#xE9; na tomto dvo&#x159;e zachyt&#xE1;vaj&#xED; de&#x161;&#x165;ov&#xE9; kapky. Na dvorek m&#x16F;&#x17E;ete um&#xED;stit bu&#x10F; spoustu mal&#xFD;ch kbel&#xED;k&#x16F;, nebo men&#x161;&#xED; po&#x10D;et velk&#xFD;ch kbel&#xED;k&#x16F;. Pixel binning funguje tak, jako byste spojili &#x10D;ty&#x159;i nebo dev&#x11B;t kbel&#xED;k&#x16F; do jednoho.<\/p>\n<h2>Spojen&#xED; n&#x11B;kolika pixel&#x16F; do jednoho<\/h2>\n<p>Existuje n&#x11B;kolik zp&#x16F;sob&#x16F;, jak bojovat s nedostatky p&#x159;&#xED;li&#x161; mal&#xFD;ch pixel&#x16F;. Jednou z mo&#x17E;nost&#xED; je nap&#x159;&#xED;klad po&#x159;&#xED;zen&#xED; v&#xED;ce sn&#xED;mk&#x16F;, ze kter&#xFD;ch je n&#xE1;sledn&#x11B; sestavena v&#xFD;sledn&#xE1; fotografie. Do jist&#xE9; m&#xED;ry lze pou&#x17E;&#xED;t v&#x11B;t&#x161;&#xED; sn&#xED;ma&#x10D;, na kter&#xFD; je mo&#x17E;n&#xE9; um&#xED;stit v&#x11B;t&#x161;&#xED; pixely, av&#x161;ak s ohledem na mal&#xFD; prostor, kter&#xFD; v tomto sm&#x11B;ru poskytuj&#xED; mobiln&#xED; telefony, jsou mo&#x17E;nosti zna&#x10D;n&#x11B; omezen&#xE9;.<\/p>\n<figure id=\"attachment_95395\" aria-describedby=\"caption-attachment-95395\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Takto-funguje-pixel-binning.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-95395\" src=\"https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Takto-funguje-pixel-binning.jpg\" alt=\"Takto funguje pixel binning\" width=\"800\" height=\"268\" srcset=\"https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Takto-funguje-pixel-binning.jpg 800w, https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Takto-funguje-pixel-binning-300x101.jpg 300w, https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Takto-funguje-pixel-binning-768x257.jpg 768w, https:\/\/xm.cz\/blog\/wp-content\/uploads\/2022\/06\/Takto-funguje-pixel-binning-50x17.jpg 50w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a><figcaption id=\"caption-attachment-95395\" class=\"wp-caption-text\">Takto funguje pixel binning<\/figcaption><\/figure>\n<p>V&#xFD;robci proto p&#x159;i&#x161;li s &#x159;e&#x161;en&#xED;m: <b>softwarov&#x11B; spojuj&#xED; n&#x11B;kolik sousedn&#xED;ch pixel&#x16F; do jednoho &#x201E;superpixelu&#x201C;<\/b>. Funguje to vlastn&#x11B; jednodu&#x161;e: ze &#x10D;ty&#x159; pixel&#x16F; v matici 2&#xD7;2 &#x10D;i dev&#xED;ti pixel&#x16F; v matici 3&#xD7;3 sestav&#xED; fotoapar&#xE1;t jeden bod v&#xFD;sledn&#xE9; fotografie. To sice znamen&#xE1; ni&#x17E;&#x161;&#xED; v&#xFD;sledn&#xE9; rozli&#x161;en&#xED;, ale vy&#x161;&#x161;&#xED; citlivost, proto&#x17E;e &#x10D;ty&#x159;i &#x10D;i dev&#x11B;t pixel&#x16F; zachyt&#xED; v&#xED;ce sv&#x11B;tla ne&#x17E; jeden.<\/p>\n<p>P&#x159;esto je nutn&#xE9; upozornit, &#x17E;e ani spojen&#xED; n&#x11B;kolika mal&#xFD;ch pixel&#x16F; <b>nedosahuje takov&#xE9; kvality<\/b>, jako v p&#x159;&#xED;pad&#x11B; fotoapar&#xE1;tu se sn&#xED;ma&#x10D;em s v&#x11B;t&#x161;&#xED;mi pixely. Mezi pixely jsou toti&#x17E; miniaturn&#xED; mezery, kter&#xE9; je nutn&#xE9; softwarov&#x11B; kompenzovat.<\/p>\n<h2>K &#x10D;emu je pixel binning dobr&#xFD;?<\/h2>\n<p>Zkr&#xE1;tka a dob&#x159;e, spojov&#xE1;n&#xED; pixel&#x16F; je kreativn&#xED; &#x159;e&#x161;en&#xED; fyzick&#xFD;ch omezen&#xED; dan&#xFD;ch neust&#xE1;le rostouc&#xED;m po&#x10D;tem pixel&#x16F; na sn&#xED;ma&#x10D;&#xED;ch, kter&#xE9; mus&#xED; z&#x16F;stat mal&#xE9;, aby se ve&#x161;ly do telefonu. Rychle se st&#xE1;v&#xE1; standardem a nen&#xED; t&#x11B;&#x17E;k&#xE9; pochopit pro&#x10D;: pom&#xE1;h&#xE1; n&#xE1;m z&#xED;skat <b>vizu&#xE1;ln&#x11B; lep&#x161;&#xED; fotografie<\/b> i p&#x159;i osv&#x11B;tlen&#xED;, kter&#xE9; by jinak vy&#x17E;adovalo vysok&#xE9; ISO zp&#x16F;sobuj&#xED;c&#xED; &#x161;um nebo dlouh&#xE9; expozi&#x10D;n&#xED; &#x10D;asy n&#xE1;chyln&#xE9; k rozmaz&#xE1;n&#xED;.<\/p>\n<p>Sn&#xED;mky po&#x159;&#xED;zen&#xE9; pomoc&#xED; slou&#x10D;en&#xFD;ch pixel&#x16F; <b>by m&#x11B;ly b&#xFD;t jasn&#x11B;j&#x161;&#xED; a nab&#xED;zet ni&#x17E;&#x161;&#xED; &#x161;um<\/b> ne&#x17E; b&#x11B;&#x17E;n&#xE9; sn&#xED;mky s pln&#xFD;m rozli&#x161;en&#xED;m. Za jejich nev&#xFD;hodu lze pova&#x17E;ovat n&#x11B;kolikan&#xE1;sobn&#x11B; ni&#x17E;&#x161;&#xED; rozli&#x161;en&#xED; v&#xFD;sledn&#xE9; fotografie a o n&#x11B;co hor&#x161;&#xED; p&#x159;esnost barev, kterou by m&#x11B;ly &#x159;e&#x161;it korek&#x10D;n&#xED; algoritmy.<\/p>\n<p>Sdru&#x17E;ov&#xE1;n&#xED; pixel&#x16F; je d&#x16F;le&#x17E;it&#xE9; pro fyzicky mal&#xE9; sn&#xED;ma&#x10D;e fotoapar&#xE1;t&#x16F; s vysok&#xFD;m rozli&#x161;en&#xED;m, kter&#xE9; dnes najdete v mnoha telefonech, proto&#x17E;e jim pom&#xE1;h&#xE1; rozpoznat obzvl&#xE1;&#x161;t&#x11B; tmav&#xE9; sc&#xE9;ny. Je to kompromis: rozli&#x161;en&#xED; se drasticky sn&#xED;&#x17E;&#xED;, ale zv&#xFD;&#x161;&#xED; se citlivost na sv&#x11B;tlo. <b>&#x10C;&#xE1;ste&#x10D;n&#x11B; je to tak&#xE9; marketing<\/b>, proto&#x17E;e fotoapar&#xE1;t s rozli&#x161;en&#xED;m 108 megapixel&#x16F; vypad&#xE1; ve specifikac&#xED;ch mnohem p&#x16F;sobiv&#x11B;ji ne&#x17E; fotoapar&#xE1;t s rozli&#x161;en&#xED;m 12 megapixel&#x16F; &#x2013; i kdy&#x17E; jsou po v&#x11B;t&#x161;inu &#x10D;asu fakticky stejn&#xE9;.<\/p>\n<p><i>Zdroje: <a href=\"https:\/\/www.androidpolice.com\/what-is-pixel-binning\/\" target=\"_blank\" rel=\"noopener\">androidpolice.com<\/a>, <a href=\"https:\/\/www.androidauthority.com\/what-is-pixel-binning-966179\/\" target=\"_blank\" rel=\"noopener\">androidauthority.com<\/a>, <a href=\"https:\/\/www.androidpolice.com\/pixel-binning-comparison\/\" target=\"_blank\" rel=\"noopener\">androidpolice.com<\/a>.<\/i><\/p>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Rozli\u0161en\u00ed fotoapar\u00e1tu je v segmentu mobiln\u00edch telefon\u016f jedn\u00edm z hojn\u011b prezentovan\u00fdch parametr\u016f. Jen\u017ee koup\u00edte si mobil s rozli\u0161en\u00edm 108Mpx a<\/p>\n","protected":false},"author":3,"featured_media":95399,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[2],"tags":[4328,1314,4644,6767,6768,1499],"class_list":["post-95394","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-clanky","tag-foto","tag-fotoaparat","tag-fotocip","tag-fotografie","tag-fotografovani","tag-pixel-binning"],"wppr_data":{"cwp_meta_box_check":"No"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pro\u010d 108Mpx fo\u0165\u00e1k po\u0159izuje 12Mpx fotky? D\u016fvodem je pixel binning<\/title>\n<meta name=\"description\" content=\"Mobil s rozli\u0161en\u00edm 108Mpx po\u0159izuje sn\u00edmky v rozli\u0161en\u00ed 12 Mpx. Jak je to mo\u017en\u00e9? Odpov\u011bd\u00ed je technologie ozna\u010dovan\u00e1 jako pixel binning.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/xm.cz\/blog\/proc-108mpx-fotak-porizuje-12mpx-fotky-duvodem-je-pixel-binning\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pro\u010d 108Mpx fo\u0165\u00e1k po\u0159izuje 12Mpx fotky? D\u016fvodem je pixel binning\" \/>\n<meta property=\"og:description\" content=\"Mobil s rozli\u0161en\u00edm 108Mpx po\u0159izuje sn\u00edmky v rozli\u0161en\u00ed 12 Mpx. Jak je to mo\u017en\u00e9? 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