[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.oskarimax.cz\/prichazi-nova-hrozba-internetu-deepfake\/#Article","mainEntityOfPage":"https:\/\/www.oskarimax.cz\/prichazi-nova-hrozba-internetu-deepfake\/","headline":"P\u0159ich\u00e1z\u00ed nov\u00e1 hrozba internetu \u2013 Deepfake","name":"P\u0159ich\u00e1z\u00ed nov\u00e1 hrozba internetu \u2013 Deepfake","description":"Deepfake je technologie zalo\u017een\u00e1 na um\u011bl\u00e9 inteligenci (AI = Artificial Intelligence), kter\u00e1 se pou\u017e\u00edv\u00e1 k\u00a0produkci nebo zm\u011bn\u011b videoobsahu, tak\u017ee p\u0159edstavuje n\u011bco, co se ve skute\u010dnosti nestalo. Term\u00edn je pojmenov\u00e1n podle u\u017eivatele f\u00f3ra Reddit, zn\u00e1m\u00e9ho pod p\u0159ezd\u00edvkou \u201edeepfakes\u201c, kter\u00fd v\u00a0prosinci roku 2017 pou\u017e\u00edval technologii hlubok\u00e9ho u\u010den\u00ed k\u00a0\u00faprav\u00e1m tv\u00e1\u0159\u00ed celebrit na lidi v\u00a0pornografick\u00fdch videoklipech. Term\u00edn, kter\u00fd se...","datePublished":"2019-09-12","dateModified":"2023-05-03","author":{"@type":"Person","@id":"https:\/\/www.oskarimax.cz\/author\/#Person","name":"","url":"https:\/\/www.oskarimax.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/4e6a74466e4227c12d5306875d08720cdfce3572213740db6f4a2e5e46e710ff?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/4e6a74466e4227c12d5306875d08720cdfce3572213740db6f4a2e5e46e710ff?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"oskarimax.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.oskarimax.cz\/wp-content\/uploads\/img_a356851_w3876_t1571466061.jpg","url":"https:\/\/www.oskarimax.cz\/wp-content\/uploads\/img_a356851_w3876_t1571466061.jpg","height":0,"width":0},"url":"https:\/\/www.oskarimax.cz\/prichazi-nova-hrozba-internetu-deepfake\/","about":["IT"],"wordCount":461,"articleBody":"Deepfake je technologie zalo\u017een\u00e1 na um\u011bl\u00e9 inteligenci (AI = Artificial Intelligence), kter\u00e1 se pou\u017e\u00edv\u00e1 k\u00a0produkci nebo zm\u011bn\u011b videoobsahu, tak\u017ee p\u0159edstavuje n\u011bco, co se ve skute\u010dnosti nestalo. Term\u00edn je pojmenov\u00e1n podle u\u017eivatele f\u00f3ra Reddit, zn\u00e1m\u00e9ho pod p\u0159ezd\u00edvkou \u201edeepfakes\u201c, kter\u00fd v\u00a0prosinci roku 2017 pou\u017e\u00edval technologii hlubok\u00e9ho u\u010den\u00ed k\u00a0\u00faprav\u00e1m tv\u00e1\u0159\u00ed celebrit na lidi v\u00a0pornografick\u00fdch videoklipech. Term\u00edn, kter\u00fd se vztahuje jak na technologie, tak na takto vytvo\u0159en\u00e1 videa, je kombinac\u00ed anglick\u00fdch n\u00e1zv\u016f hlubok\u00e9ho u\u010den\u00ed a fale\u0161n\u00e9ho obsahu.Fale\u0161n\u00e9 video je vytvo\u0159eno pomoc\u00ed dvou konkuren\u010dn\u00edch syst\u00e9m\u016f AI \u2013 jeden se naz\u00fdv\u00e1 diskrimin\u00e1tor a druh\u00fd gener\u00e1tor. Gener\u00e1tor v\u00a0z\u00e1sad\u011b vytvo\u0159\u00ed fale\u0161n\u00fd videoklip a pot\u00e9 po\u017e\u00e1d\u00e1 diskrimin\u00e1tor, aby ur\u010dil, zda je klip skute\u010dn\u00fd nebo fale\u0161n\u00fd. Poka\u017ed\u00e9, kdy\u017e diskrimin\u00e1tor p\u0159esn\u011b identifikuje videoklip jako fale\u0161n\u00fd, d\u00e1v\u00e1 gener\u00e1torov\u00ed v\u011bd\u011bt o tom, co d\u011blat p\u0159i vytv\u00e1\u0159en\u00ed upraven\u00e9 verze klipu.Gener\u00e1tor a diskrimin\u00e1tor dohromady vytvo\u0159\u00ed tzv. generative adversial networks (GAN). Prvn\u00ed krokem pro vznik GAN je identifikace po\u017eadovan\u00e9ho v\u00fdstupu a vytvo\u0159en\u00ed tr\u00e9ninkov\u00e9ho datov\u00e9ho souboru pro gener\u00e1tor. Jakmile gener\u00e1tor za\u010dne vytv\u00e1\u0159et kvalitativn\u011b p\u0159ijatelnou \u00farove\u0148 v\u00fdstupu, poskytne v\u00fdstupn\u00ed videoklip diskrimin\u00e1toru k\u00a0ohodnocen\u00ed. P\u0159itom s\u00a0t\u00edm, jak se gener\u00e1tor zlep\u0161uje v\u00a0tvorb\u011b kvalitn\u011bj\u0161\u00edch fale\u0161n\u00fdch videoklip\u016f, i diskrimin\u00e1tor se zlep\u0161uje v\u00a0detekov\u00e1n\u00ed fale\u0161n\u00fdch vide\u00ed, co\u017e ve v\u00fdsledku vede k\u00a0precizn\u00edm v\u00fdsledk\u016fm.Doned\u00e1vna bylo obt\u00ed\u017en\u00e9 v\u00fdrazn\u00fdm zp\u016fsobem zm\u011bnit obsah videa. Videa jsou v\u0161ak tvo\u0159ena pomoc\u00ed um\u011bl\u00e9 inteligence, co\u017e do zna\u010dn\u00e9 m\u00edry cel\u00fd proces zjednodu\u0161uje a urychluje. Pro tvorbu deepfak\u016f nejsou pot\u0159eba odborn\u00e9 znalosti, sta\u010d\u00ed um\u011bl\u00e9 inteligence p\u0159edlo\u017eit dostatek vstupn\u00edch dat a o zbytek se \u010dlov\u011bk nemus\u00ed starat. To bohu\u017eel znamen\u00e1, \u017ee t\u00e9m\u011b\u0159 ka\u017ed\u00fd m\u016f\u017ee vytvo\u0159it fale\u0161n\u00e9 video, kter\u00e9 bude k\u00a0nerozezn\u00e1n\u00ed od re\u00e1ln\u00e9ho videoklipu, \u010d\u00edm\u017e m\u016f\u017ee vytv\u00e1\u0159et fale\u0161n\u00e9 popla\u0161n\u00e9 zpr\u00e1vy, l\u017eivou reklamu nebo n\u011bkoho po\u0161kodit. Probl\u00e9m je, \u017ee lid\u00e9 bu\u010f budou vytvo\u0159en\u00fdm vide\u00edm d\u016fv\u011b\u0159ovat nebo naopak nebudou d\u016fv\u011b\u0159ovat ni\u010demu a nebudou si moct b\u00fdt jist\u00ed, co se na internetu dozv\u011bd\u011bli. Ne, \u017ee by nyn\u00ed d\u016fv\u011b\u0159ovat pravosti v\u0161eho na internetu mohli, ale deepfake je dal\u0161\u00ed zp\u016fsob, jak je\u0161t\u011b v\u00edce u\u017eivatele znejist\u011bt. 4\/5 - (9 votes) "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"P\u0159ich\u00e1z\u00ed nov\u00e1 hrozba internetu \u2013 Deepfake","item":"https:\/\/www.oskarimax.cz\/prichazi-nova-hrozba-internetu-deepfake\/#breadcrumbitem"}]}]