{"id":334913,"date":"2026-10-09T07:12:11","date_gmt":"2026-10-09T07:12:11","guid":{"rendered":"https:\/\/blog.skylum.com\/nejlepsi-bezplatne-nastroje-pro-zvetsovani-obrazku-pomoci-ai-7-nejlepsich-nastroju\/"},"modified":"2026-10-09T07:15:38","modified_gmt":"2026-10-09T07:15:38","slug":"best-free-ai-image-upscalers","status":"publish","type":"post","link":"https:\/\/blog.skylum.com\/cs\/best-free-ai-image-upscalers\/","title":{"rendered":"Nejlep\u0161\u00ed bezplatn\u00e9 n\u00e1stroje pro zv\u011bt\u0161ov\u00e1n\u00ed obr\u00e1zk\u016f pomoc\u00ed AI: 7 nejlep\u0161\u00edch n\u00e1stroj\u016f"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">I ten nejmen\u0161\u00ed obr\u00e1zek m\u016f\u017ee na obrazovce vypadat naprosto v po\u0159\u00e1dku, dokud se ho nepokus\u00edte vytisknout, o\u0159\u00edznout nebo pou\u017e\u00edt v rozs\u00e1hlej\u0161\u00edm n\u00e1vrhu. Pr\u00e1v\u011b v takov\u00fdch p\u0159\u00edpadech m\u016f\u017ee upscaling pomoc\u00ed um\u011bl\u00e9 inteligence znamenat skute\u010dn\u00fd rozd\u00edl. Nam\u00edsto pouh\u00e9ho roztahov\u00e1n\u00ed pixel\u016f dok\u00e1\u017eou modern\u00ed modely rekonstruovat hrany, textury a dal\u0161\u00ed jemn\u00e9 detaily, d\u00edky \u010demu\u017e v\u011bt\u0161\u00ed obr\u00e1zek vypad\u00e1 p\u0159irozen\u011bji.<\/p>\n\n<p class=\"wp-block-paragraph\">Pojem \u201ezdarma\u201c v\u0161ak m\u016f\u017ee m\u00edt u jednotliv\u00fdch program\u016f pro zv\u011bt\u0161ov\u00e1n\u00ed obr\u00e1zk\u016f velmi odli\u0161n\u00fd v\u00fdznam. N\u011bkter\u00e9 v\u00e1m umo\u017e\u0148uj\u00ed zpracovat tolik obr\u00e1zk\u016f, kolik v\u00e1\u0161 po\u010d\u00edta\u010d zvl\u00e1dne, zat\u00edmco jin\u00e9 v\u00e1m poskytnou jen n\u011bkolik kredit\u016f nebo omezuj\u00ed velikost souboru a rozli\u0161en\u00ed. V\u00fdsledky se mohou li\u0161it stejn\u011b v\u00fdrazn\u011b, zejm\u00e9na pokud p\u0159ech\u00e1z\u00edte od b\u011b\u017en\u00fdch fotografi\u00ed k ilustrac\u00edm, anime nebo star\u00fdm sken\u016fm.<\/p>\n\n<p class=\"wp-block-paragraph\">Na co byste tedy m\u011bli db\u00e1t p\u0159i v\u00fdb\u011bru nejlep\u0161\u00edho bezplatn\u00e9ho n\u00e1stroje pro zv\u011bt\u0161ov\u00e1n\u00ed rozli\u0161en\u00ed obr\u00e1zk\u016f? Porovnali jsme sedm mo\u017enost\u00ed dostupn\u00fdch v roce 2026 a pod\u00edvali jsme se na to, jak si porad\u00ed s r\u016fzn\u00fdmi typy obr\u00e1zk\u016f, co vlastn\u011b dostanete zdarma a kde m\u00e1 ka\u017ed\u00fd z nich sv\u00e9 limity.<\/p>\n\n<p class=\"important-text wp-block-paragraph\">Kl\u00ed\u010dov\u00e9 poznatky<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Upscayl je skv\u011blou volbou pro neomezen\u00e9 lok\u00e1ln\u00ed zpracov\u00e1n\u00ed, zat\u00edmco Upscale.media se hod\u00ed sp\u00ed\u0161e pro rychl\u00e9 zv\u011bt\u0161ov\u00e1n\u00ed p\u0159\u00edmo v prohl\u00ed\u017ee\u010di, kdy\u017e nechcete instalovat \u017e\u00e1dn\u00fd software.<\/li>\n\n\n\n<li>Bigjpg a Waifu2x jsou obzvl\u00e1\u0161t\u011b u\u017eite\u010dn\u00e9 pro anime, ilustrace, kresby a skeny, kde m\u016f\u017ee b\u00fdt zachov\u00e1n\u00ed \u010dist\u00fdch okraj\u016f d\u016fle\u017eit\u011bj\u0161\u00ed ne\u017e fotografick\u00e9 detaily.<\/li>\n\n\n\n<li>ImgUpscaler nab\u00edz\u00ed 50 bezplatn\u00fdch kredit\u016f m\u011bs\u00ed\u010dn\u011b, co\u017e z n\u011bj \u010din\u00ed praktickou volbu pro p\u0159\u00edle\u017eitostn\u00e9 vylep\u0161ov\u00e1n\u00ed fotografi\u00ed online.<\/li>\n\n\n\n<li>Clipdrop stoj\u00ed za zv\u00e1\u017een\u00ed, pokud v\u00e1m sta\u010d\u00ed zv\u011bt\u0161en\u00ed na dvojn\u00e1sobek a hled\u00e1te n\u00e1stroj v prohl\u00ed\u017ee\u010di pro pravideln\u00e9, men\u0161\u00ed \u00falohy zv\u011bt\u0161ov\u00e1n\u00ed.<\/li>\n\n\n\n<li>Krea vol\u00ed \u0161ir\u0161\u00ed p\u0159\u00edstup a kombinuje omezen\u00e9 bezplatn\u00e9 zv\u011bt\u0161ov\u00e1n\u00ed s dal\u0161\u00edmi funkcemi pro pr\u00e1ci s obr\u00e1zky zalo\u017een\u00fdmi na um\u011bl\u00e9 inteligenci, tak\u017ee se nejv\u00edce hod\u00ed v p\u0159\u00edpad\u011b, \u017ee zv\u011bt\u0161ov\u00e1n\u00ed tvo\u0159\u00ed pouze \u010d\u00e1st va\u0161eho pracovn\u00edho postupu.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">1. Upscayl: Nejlep\u0161\u00ed volba pro neomezen\u00e9 lok\u00e1ln\u00ed upscaling<\/h2>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"673\" src=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-unlimited-local-upscaling.png\" alt=\"Upscayl | Blog Skylum&#10;&#10;\" class=\"wp-image-334882\" srcset=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-unlimited-local-upscaling.png 1200w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-unlimited-local-upscaling-768x431.png 768w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-unlimited-local-upscaling-508x285.png 508w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-unlimited-local-upscaling-700x393.png 700w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">Upscayl je dobrou volbou, pokud d\u00e1v\u00e1te p\u0159ednost jednoduch\u00e9mu \u0159e\u0161en\u00ed a chcete pracovat na sv\u00e9m vlastn\u00edm po\u010d\u00edta\u010di. Tato desktopov\u00e1 aplikace je zdarma a je k dispozici jako open source, p\u0159i\u010dem\u017e va\u0161e obr\u00e1zky z\u016fst\u00e1vaj\u00ed b\u011bhem zpracov\u00e1n\u00ed na va\u0161em za\u0159\u00edzen\u00ed. Neexistuje zde ani \u017e\u00e1dn\u00fd m\u011bs\u00ed\u010dn\u00ed limit, tak\u017ee m\u016f\u017eete zv\u011bt\u0161ovat tolik obr\u00e1zk\u016f, kolik v\u00e1\u0161 po\u010d\u00edta\u010d zvl\u00e1dne.<\/p>\n\n<p class=\"wp-block-paragraph\">Tento software vyu\u017e\u00edv\u00e1 modely zalo\u017een\u00e9 na Real-ESRGAN a umo\u017e\u0148uje u\u017eivatel\u016fm vybrat si z n\u011bkolika model\u016f, p\u0159i\u010dem\u017e podporuje i vlastn\u00ed modely. Standardn\u00ed modely jsou prim\u00e1rn\u011b navr\u017eeny pro 4x zpracov\u00e1n\u00ed, a\u010dkoli kompatibiln\u00ed vlastn\u00ed modely mohou poskytovat i jin\u00e9 m\u011b\u0159\u00edtka.<\/p>\n\n<p class=\"wp-block-paragraph\">Je zde v\u0161ak jeden d\u016fle\u017eit\u00fd h\u00e1\u010dek: Upscayl vy\u017eaduje grafick\u00fd hardware kompatibiln\u00ed s Vulkanem. N\u011bkter\u00e9 integrovan\u00e9 grafick\u00e9 karty a procesory nemus\u00ed fungovat spr\u00e1vn\u011b, tak\u017ee to nen\u00ed nejlep\u0161\u00ed volba pro ka\u017ed\u00fd notebook.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Nejvhodn\u011bj\u0161\u00ed pro:<\/strong> fotografy s kompatibiln\u00edm hardwarem, sn\u00edmky citliv\u00e9 z hlediska ochrany soukrom\u00ed a velk\u00e9 d\u00e1vky.<\/p>\n\n<h2 class=\"wp-block-heading\">2. Bigjpg: Nejvhodn\u011bj\u0161\u00ed pro ilustrace a anime<\/h2>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"680\" src=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-illustrations-and-anime.png\" alt=\"Bigjpg | Blog Skylum&#10;&#10;\" class=\"wp-image-334822\" srcset=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-illustrations-and-anime.png 1200w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-illustrations-and-anime-768x435.png 768w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-illustrations-and-anime-508x288.png 508w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-illustrations-and-anime-700x397.png 700w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">Bigjpg vol\u00ed odli\u0161n\u00fd p\u0159\u00edstup. Jeho zv\u011bt\u0161ov\u00e1n\u00ed pomoc\u00ed neuronov\u00e9 s\u00edt\u011b je zam\u011b\u0159eno zejm\u00e9na na obr\u00e1zky z anime, ilustrace a um\u011bleck\u00e1 d\u00edla, a\u010dkoli podporuje i b\u011b\u017en\u00e9 fotografie.<\/p>\n\n<p class=\"wp-block-paragraph\">Bezplatn\u00fd tarif v sou\u010dasn\u00e9 dob\u011b umo\u017e\u0148uje zpracovat a\u017e 20 obr\u00e1zk\u016f m\u011bs\u00ed\u010dn\u011b, p\u0159i\u010dem\u017e maxim\u00e1ln\u00ed velikost nahran\u00e9ho souboru je 5 MB a zv\u011bt\u0161en\u00ed a\u017e 4x. Bezplatn\u00e9 zpracov\u00e1n\u00ed je pomalej\u0161\u00ed ne\u017e placen\u00e9 a hromadn\u00e9 zv\u011bt\u0161ov\u00e1n\u00ed nen\u00ed zahrnuto.<\/p>\n\n<p class=\"wp-block-paragraph\">Skute\u010dnou v\u00fdhodou je typ obr\u00e1zku. Pokud m\u00e1 ilustrace s n\u00edzk\u00fdm rozli\u0161en\u00edm \u010dist\u00e9 linie, jednolit\u00e9 barvy nebo detaily ve stylu anime, m\u016f\u017ee b\u00fdt Bigjpg vhodn\u011bj\u0161\u00ed ne\u017e univerz\u00e1ln\u00ed n\u00e1stroj pro vylep\u0161en\u00ed fotografi\u00ed.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Nejvhodn\u011bj\u0161\u00ed pro:<\/strong> anime, digit\u00e1ln\u00ed um\u011bn\u00ed, ilustrace a skeny.<\/p>\n\n<h2 class=\"wp-block-heading\">3. ImgUpscaler: Nejlep\u0161\u00ed pro jednoduch\u00e9 online zv\u011bt\u0161ov\u00e1n\u00ed fotografi\u00ed<\/h2>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"685\" src=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-simple-online-photo-enlargement.png\" alt=\"ImgUpscaler | Blog Skylum&#10;&#10;\" class=\"wp-image-334852\" srcset=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-simple-online-photo-enlargement.png 1200w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-simple-online-photo-enlargement-768x438.png 768w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-simple-online-photo-enlargement-508x290.png 508w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-simple-online-photo-enlargement-700x400.png 700w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">Pokud pot\u0159ebujete zv\u011bt\u0161it jen n\u011bkolik obr\u00e1zk\u016f, je ImgUpscaler pom\u011brn\u011b snadno pou\u017eitelnou volbou. Bezplatn\u00fd tarif nab\u00edz\u00ed 50 kredit\u016f m\u011bs\u00ed\u010dn\u011b, tak\u017ee bez placen\u00e9ho p\u0159edplatn\u00e9ho vysta\u010d\u00edte na p\u0159\u00edle\u017eitostn\u00e9 projekty. Hlavn\u00edm omezen\u00edm je, \u017ee bezplatn\u00e1 verze zpracov\u00e1v\u00e1 v\u017edy jen jeden obr\u00e1zek najednou.<\/p>\n\n<p class=\"wp-block-paragraph\">Rozhran\u00ed je z\u00e1m\u011brn\u011b jednoduch\u00e9: nahrajte obr\u00e1zek, vyberte postup \u00fapravy a st\u00e1hn\u011bte si v\u00fdsledek. D\u00edky tomu se hod\u00ed pro p\u0159\u00edle\u017eitostn\u00e9 produktov\u00e9 fotografie, obr\u00e1zky na soci\u00e1ln\u00ed s\u00edt\u011b, portr\u00e9ty a dal\u0161\u00ed b\u011b\u017en\u00e9 soubory.<\/p>\n\n<p class=\"wp-block-paragraph\">Omezen\u00edm je objem. Bezplatn\u00fd tarif neumo\u017e\u0148uje neomezen\u00e9 zpracov\u00e1n\u00ed a hromadn\u00e9 zpracov\u00e1n\u00ed je vyhrazeno pro plat\u00edc\u00ed u\u017eivatele. Pokud v\u0161ak ka\u017ed\u00fd t\u00fdden zv\u011bt\u0161ujete jen n\u011bkolik obr\u00e1zk\u016f, je pr\u00e1ce se syst\u00e9mem kredit\u016f relativn\u011b snadn\u00e1.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Nejvhodn\u011bj\u0161\u00ed pro:<\/strong> p\u0159\u00edle\u017eitostn\u00e9 vylep\u0161ov\u00e1n\u00ed fotografi\u00ed online bez pou\u017eit\u00ed stoln\u00edho softwaru.<\/p>\n\n<h2 class=\"wp-block-heading\">4. Upscale.media: Nejvhodn\u011bj\u0161\u00ed pro rychl\u00e9, p\u0159\u00edle\u017eitostn\u00e9 v\u00fdsledky<\/h2>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"668\" src=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-quick-occasional-results.png\" alt=\"Pr&#xE9;miov&#xE1; m&#xE9;dia | Blog Skylum&#10;&#10;\" class=\"wp-image-334837\" srcset=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-quick-occasional-results.png 1200w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-quick-occasional-results-768x428.png 768w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-quick-occasional-results-508x283.png 508w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-quick-occasional-results-700x390.png 700w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">Upscale.media je jednoduch\u00e1 volba pro jednor\u00e1zov\u00e9 \u00fakoly, ale \u010dast\u00ed u\u017eivatel\u00e9 brzy naraz\u00ed na limity bezplatn\u00e9 verze. Bezplatn\u00fd tarif zahrnuje t\u0159i kredity a t\u0159i sta\u017een\u00ed m\u011bs\u00ed\u010dn\u011b.<\/p>\n\n<p class=\"wp-block-paragraph\">Tento mal\u00fd limit m\u016f\u017ee b\u00fdt p\u0159esto u\u017eite\u010dn\u00fd, pokud pot\u0159ebujete zv\u011bt\u0161it konkr\u00e9tn\u00ed obr\u00e1zek, nikoli celou slo\u017eku soubor\u016f. Slu\u017eba je obzvl\u00e1\u0161t\u011b praktick\u00e1 v p\u0159\u00edpadech, kdy nen\u00ed mo\u017en\u00e9 nainstalovat desktopov\u00fd software.<\/p>\n\n<p class=\"wp-block-paragraph\">Hlavn\u00ed v\u011bc\u00ed, kterou je t\u0159eba zkontrolovat p\u0159edt\u00edm, ne\u017e si ji vyberete pro pravidelnou pr\u00e1ci, je bezplatn\u00fd limit. T\u0159i m\u011bs\u00ed\u010dn\u00ed sta\u017een\u00ed mohou rychle zmizet, pokud experimentujete s n\u011bkolika verzemi.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Nejvhodn\u011bj\u0161\u00ed pro:<\/strong> jednor\u00e1zov\u00e1 zv\u011bt\u0161en\u00ed a rychl\u00e9 \u00falohy v prohl\u00ed\u017ee\u010di.<\/p>\n\n<div class=\"skylum-article-cta\"  style=\"background-image: url(https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/02\/cta-new-banner-2-2.webp); background-size: cover; background-position: center; background-repeat: no-repeat;\">\n    <div class=\"skylum-article-cta__container\">\n                    <p class=\"skylum-article-cta__title\">Zlep\u0161ete sv\u00e9 fotografie pomoc\u00ed na\u0161eho pokro\u010dil\u00e9ho softwaru\r\n\r\n<\/p>\n                        <div class=\"skylum-article-cta__btns-wrap\">\n                            <a class=\"skylum-article-cta__btn\" href=\"https:\/\/skylum.com\/cs\/luminar\/pricing\" target=\"\">\n                    Objevte ceny                <\/a>\n                                <\/div>\n    <\/div>\n<\/div>\n<h2 class=\"wp-block-heading\">5. Clipdrop: Nejvhodn\u011bj\u0161\u00ed pro mal\u00e9, \u010dast\u00e9 zv\u011bt\u0161en\u00ed na dvojn\u00e1sobnou velikost<\/h2>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"580\" src=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-small-frequent-2x-upscales.png\" alt=\"Clipdrop | Blog Skylum&#10;&#10;\" class=\"wp-image-334867\" srcset=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-small-frequent-2x-upscales.png 1200w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-small-frequent-2x-upscales-768x371.png 768w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-small-frequent-2x-upscales-508x246.png 508w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-small-frequent-2x-upscales-700x338.png 700w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">Clipdrop je vhodnou volbou, pokud pot\u0159ebujete obr\u00e1zky zv\u011bt\u0161ovat jen m\u00edrn\u011b. Jeho bezplatn\u00fd tarif nab\u00edz\u00ed 20 pou\u017eit\u00ed n\u00e1stroje 2x Image Upscaler ka\u017ed\u00fdch 24 hodin, co\u017e pro p\u0159\u00edle\u017eitostn\u00e9 pou\u017eit\u00ed bohat\u011b sta\u010d\u00ed.<\/p>\n\n<p class=\"wp-block-paragraph\">D\u00edky tomu je tato slu\u017eba prakti\u010dt\u011bj\u0161\u00ed ne\u017e mnoho n\u00e1stroj\u016f zalo\u017een\u00fdch na kreditech pro u\u017eivatele, kte\u0159\u00ed pravideln\u011b pot\u0159ebuj\u00ed zpracovat mal\u00e9 d\u00e1vky obr\u00e1zk\u016f. Omezen\u00edm je faktor zv\u011bt\u0161en\u00ed: bezplatn\u00fd n\u00e1stroj pro zv\u011bt\u0161ov\u00e1n\u00ed je ur\u010den pro v\u00fdstup ve dvojn\u00e1sobn\u00e9m rozli\u0161en\u00ed, tak\u017ee nen\u00ed ide\u00e1ln\u00ed volbou, pokud pot\u0159ebujete zv\u011bt\u0161en\u00ed \u010dty\u0159n\u00e1sobn\u00e9 nebo \u0161estin\u00e1sobn\u00e9.<\/p>\n\n<p class=\"wp-block-paragraph\">Clipdrop je tak\u00e9 sou\u010d\u00e1st\u00ed \u0161ir\u0161\u00ed kolekce n\u00e1stroj\u016f pro pr\u00e1ci s obr\u00e1zky vyu\u017e\u00edvaj\u00edc\u00edch um\u011blou inteligenci, co\u017e m\u016f\u017ee b\u00fdt v\u00fdhodn\u00e9, pokud je zv\u011bt\u0161ov\u00e1n\u00ed pouze jednou \u010d\u00e1st\u00ed va\u0161eho pracovn\u00edho postupu.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Nejvhodn\u011bj\u0161\u00ed pro:<\/strong> \u010dast\u00e9 zv\u011bt\u0161ov\u00e1n\u00ed na dvojn\u00e1sobek a rychl\u00e9 kreativn\u00ed pracovn\u00ed postupy.<\/p>\n\n<h2 class=\"wp-block-heading\">6. Krea: Nejlep\u0161\u00ed pro experimentov\u00e1n\u00ed s vylep\u0161en\u00edm pomoc\u00ed AI<\/h2>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"536\" src=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-experimenting-with-ai-enhancement.png\" alt=\"Krea | Blog Skylum\" class=\"wp-image-334807\" srcset=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-experimenting-with-ai-enhancement.png 1200w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-experimenting-with-ai-enhancement-768x343.png 768w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-experimenting-with-ai-enhancement-508x227.png 508w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-experimenting-with-ai-enhancement-700x313.png 700w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">Krea je v\u00edc ne\u017e jen n\u00e1stroj pro zv\u011bt\u0161ov\u00e1n\u00ed rozli\u0161en\u00ed obr\u00e1zk\u016f, tak\u017ee se hod\u00ed, pokud chcete d\u011blat v\u00edc ne\u017e jen zv\u00fd\u0161it rozli\u0161en\u00ed. Bezplatn\u00fd tarif v\u00e1m nab\u00edz\u00ed 100 v\u00fdpo\u010detn\u00edch jednotek denn\u011b a zahrnuje omezen\u00e9 vylep\u0161ov\u00e1n\u00ed obr\u00e1zk\u016f s z\u00e1kladn\u00edmi v\u00fdsledky a\u017e do rozli\u0161en\u00ed 2K. D\u00edky tomu je u\u017eite\u010dn\u00fd pro vyzkou\u0161en\u00ed vylep\u0161en\u00ed spolu s dal\u0161\u00edmi n\u00e1stroji Krea pro zpracov\u00e1n\u00ed obr\u00e1zk\u016f pomoc\u00ed um\u011bl\u00e9 inteligence, ani\u017e byste museli platit za n\u011bjak\u00fd tarif.<\/p>\n\n<p class=\"wp-block-paragraph\">Tento model se hod\u00ed, pokud chcete experimentovat s vylep\u0161en\u00edm spolu s dal\u0161\u00edmi funkcemi um\u011bl\u00e9 inteligence pro zpracov\u00e1n\u00ed obr\u00e1zk\u016f. Nam\u00edsto toho, abyste zv\u011bt\u0161en\u00ed pova\u017eovali za izolovan\u00fd technick\u00fd \u00fakon, v\u00e1m Krea umo\u017e\u0148uje prozkoumat r\u016fzn\u00e9 pracovn\u00ed postupy s vyu\u017eit\u00edm um\u011bl\u00e9 inteligence na stejn\u00e9m obr\u00e1zku.<\/p>\n\n<p class=\"wp-block-paragraph\">Nev\u00fdhodou je p\u0159edv\u00eddatelnost. Jeliko\u017e bezplatn\u00e9 vyu\u017eit\u00ed je zalo\u017eeno na v\u00fdpo\u010detn\u00edm v\u00fdkonu, a nikoli na pouh\u00e9m po\u010dtu obr\u00e1zk\u016f za m\u011bs\u00edc, z\u00e1vis\u00ed po\u010det zv\u011bt\u0161en\u00ed, kter\u00e1 m\u016f\u017eete prov\u00e9st, na dan\u00e9 operaci a spot\u0159ebovan\u00fdch zdroj\u00edch.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Nejvhodn\u011bj\u0161\u00ed pro:<\/strong> tv\u016frce, kte\u0159\u00ed ji\u017e experimentuj\u00ed s generativn\u00ed AI.<\/p>\n\n<h2 class=\"wp-block-heading\">7. Waifu2x: Nejvhodn\u011bj\u0161\u00ed pro \u010dist\u00e1 um\u011bleck\u00e1 d\u00edla a \u0161um v souborech JPEG<\/h2>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"689\" src=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-clean-artwork-and-jpeg-noise.png\" alt=\"Waifu2x | Blog Skylum&#10;&#10;\" class=\"wp-image-334792\" srcset=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-clean-artwork-and-jpeg-noise.png 1200w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-clean-artwork-and-jpeg-noise-768x441.png 768w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-clean-artwork-and-jpeg-noise-508x292.png 508w, https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/10\/best-for-clean-artwork-and-jpeg-noise-700x402.png 700w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">Waifu2x stoj\u00ed za zm\u00ednku, proto\u017ee velmi dob\u0159e \u0159e\u0161\u00ed konkr\u00e9tn\u00ed probl\u00e9m. A\u010dkoli jeho n\u00e1zev vych\u00e1z\u00ed z v\u00fdvoje zam\u011b\u0159en\u00e9ho na anime, sou\u010dasn\u00fd webov\u00fd n\u00e1stroj podporuje i fotografie.<\/p>\n\n<p class=\"wp-block-paragraph\">Nab\u00edz\u00ed zv\u011bt\u0161en\u00ed 1,6x, 2x a 4x a nav\u00edc n\u011bkolik \u00farovn\u00ed redukce \u0161umu. Slu\u017eba v sou\u010dasn\u00e9 dob\u011b p\u0159ij\u00edm\u00e1 soubory o velikosti a\u017e 5 MB, p\u0159i\u010dem\u017e pro redukci \u0161umu a zv\u011bt\u0161en\u00ed plat\u00ed odli\u0161n\u00e9 limity po\u010dtu pixel\u016f.<\/p>\n\n<p class=\"wp-block-paragraph\">Ovl\u00e1dac\u00ed prvky pro redukci \u0161umu jsou obzvl\u00e1\u0161t\u011b u\u017eite\u010dn\u00e9 u star\u00fdch soubor\u016f JPEG, sken\u016f a komprimovan\u00fdch obr\u00e1zk\u016f. V\u00fdvoj\u00e1\u0159i v\u0161ak v\u00fdslovn\u011b varuj\u00ed, \u017ee redukci \u0161umu byste nem\u011bli pou\u017e\u00edvat, pokud obr\u00e1zek ve skute\u010dnosti \u017e\u00e1dn\u00fd \u0161um neobsahuje, proto\u017ee by to mohlo sn\u00ed\u017eit mno\u017estv\u00ed u\u017eite\u010dn\u00fdch detail\u016f.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Nejvhodn\u011bj\u0161\u00ed pro:<\/strong> anime, kresby, skeny a komprimovan\u00e9 obr\u00e1zky, kter\u00e9 vy\u017eaduj\u00ed jak zv\u011bt\u0161en\u00ed, tak vy\u010di\u0161t\u011bn\u00ed.<\/p>\n\n<div class=\"skylum-article-cta\"  style=\"background-image: url(https:\/\/blog.skylum.com\/wp-content\/uploads\/2026\/02\/cta-new-banner-2-2.webp); background-size: cover; background-position: center; background-repeat: no-repeat;\">\n    <div class=\"skylum-article-cta__container\">\n                    <p class=\"skylum-article-cta__title\">Editor fotografi\u00ed s um\u011blou inteligenc\u00ed pro MacOS a Windows\r\n\r\n<\/p>\n                        <div class=\"skylum-article-cta__btns-wrap\">\n                            <a class=\"skylum-article-cta__btn\" href=\"https:\/\/skylum.com\/luminar-ai\" target=\"\">\n                    Objevte nyn\u00ed!                <\/a>\n                                <\/div>\n    <\/div>\n<\/div>\n<h2 class=\"wp-block-heading\">Jak si vybrat ten nejlep\u0161\u00ed bezplatn\u00fd n\u00e1stroj pro upscaling pomoc\u00ed AI<\/h2>\n\n<p class=\"wp-block-paragraph\">Nejvy\u0161\u0161\u00ed \u010d\u00edslo v nab\u00eddce n\u00e1stroje pro zv\u011bt\u0161ov\u00e1n\u00ed nemus\u00ed nutn\u011b znamenat nejlep\u0161\u00ed v\u00fdsledek. Ne\u017e si n\u00e1stroj vyberete, pod\u00edvejte se na v\u00fdchoz\u00ed obr\u00e1zek. Ostr\u00e1 fotografie o rozm\u011brech 1500 \u00d7 1000 obsahuje spoustu u\u017eite\u010dn\u00fdch informac\u00ed, se kter\u00fdmi lze pracovat, zat\u00edmco naskenovan\u00fd obr\u00e1zek o rozm\u011brech 400 \u00d7 300 s vysokou kompres\u00ed m\u016f\u017ee ztratit detaily bez ohledu na to, jak v\u00fdkonn\u00fd je program pro zv\u011bt\u0161ov\u00e1n\u00ed.<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>U soukrom\u00fdch fotografi\u00ed<\/strong> se vyplat\u00ed up\u0159ednostnit lok\u00e1ln\u00ed zpracov\u00e1n\u00ed. Upscayl m\u00e1 v tomto ohledu velkou v\u00fdhodu, proto\u017ee jeho desktopov\u00e1 aplikace prov\u00e1d\u00ed zpracov\u00e1n\u00ed p\u0159\u00edmo na va\u0161em po\u010d\u00edta\u010di.<\/li>\n\n\n\n<li><strong>U um\u011bleck\u00fdch d\u011bl<\/strong> porovnejte Bigjpg a Waifu2x. Jejich ovl\u00e1dac\u00ed prvky a modely jsou vhodn\u011bj\u0161\u00ed pro ostr\u00e9 hrany, ilustrace, anime a skeny ne\u017e b\u011b\u017en\u00e9 n\u00e1stroje pro vylep\u0161en\u00ed fotografi\u00ed.<\/li>\n\n\n\n<li><strong>Pro p\u0159\u00edle\u017eitostn\u00e9 pou\u017eit\u00ed v prohl\u00ed\u017ee\u010di<\/strong> jsou pro za\u010d\u00e1tek jednodu\u0161\u0161\u00ed ImgUpscaler a Upscale.media. Clipdrop d\u00e1v\u00e1 v\u011bt\u0161\u00ed smysl, pokud v\u00e1m sta\u010d\u00ed dvojn\u00e1sobn\u00e9 zv\u011bt\u0161en\u00ed a n\u00e1stroj pot\u0159ebujete pravideln\u011b.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Pokud d\u00e1v\u00e1te p\u0159ednost pr\u00e1ci online, je Luminar dal\u0161\u00ed mo\u017enost\u00ed, kterou byste m\u011bli zv\u00e1\u017eit. Luminar Web se v podzimu 2026 objev\u00ed v prohl\u00ed\u017ee\u010di, zat\u00edmco Enhance AI je ur\u010den k vylep\u0161en\u00ed celkov\u00e9ho osv\u011btlen\u00ed, barev, kontrastu a detail\u016f sn\u00edmku. Pokud je hlavn\u00edm probl\u00e9mem sp\u00ed\u0161e rozli\u0161en\u00ed ne\u017e celkov\u00e1 kvalita sn\u00edmku, je vhodn\u011bj\u0161\u00edm n\u00e1strojem Upscale AI, kter\u00fd umo\u017e\u0148uje zv\u011bt\u0161en\u00ed a\u017e 6x.<\/p>\n\n<h2 class=\"wp-block-heading\">Kter\u00fd n\u00e1stroj pro zv\u011bt\u0161ov\u00e1n\u00ed s vyu\u017eit\u00edm AI vyhovuje va\u0161im pot\u0159eb\u00e1m?<\/h2>\n\n<p class=\"wp-block-paragraph\">Nen\u00ed t\u0159eba to p\u0159\u00edli\u0161 \u0159e\u0161it. Pokud zv\u011bt\u0161ujete jen p\u00e1r obr\u00e1zk\u016f sem tam, m\u016f\u017ee v\u00e1m sta\u010dit n\u00e1stroj zalo\u017een\u00fd na prohl\u00ed\u017ee\u010di. Pokud s obr\u00e1zky pracujete pravideln\u011b nebo si rad\u011bji nech\u00e1v\u00e1te soubory pro sebe, d\u00e1v\u00e1 v\u011bt\u0161\u00ed smysl lok\u00e1ln\u00ed \u0159e\u0161en\u00ed, jako je nap\u0159\u00edklad Upscayl. U ilustrac\u00ed a um\u011bleck\u00fdch d\u011bl ve stylu anime v\u00e1m specializovan\u00e9 n\u00e1stroje jako Bigjpg nebo Waifu2x mohou poskytnout \u010dist\u0161\u00ed v\u00fdsledky ne\u017e obecn\u00fd n\u00e1stroj pro zv\u011bt\u0161ov\u00e1n\u00ed fotografi\u00ed.<\/p>\n\n<p class=\"wp-block-paragraph\">Nejlep\u0161\u00ed bezplatn\u00fd n\u00e1stroj pro zv\u011bt\u0161ov\u00e1n\u00ed fotografi\u00ed nemus\u00ed b\u00fdt nutn\u011b ten, kter\u00fd slibuje nejv\u011bt\u0161\u00ed zv\u011bt\u0161en\u00ed. Ve v\u011bt\u0161in\u011b p\u0159\u00edpad\u016f je lep\u0161\u00ed za\u010d\u00edt s dvojn\u00e1sobn\u00fdm zv\u011bt\u0161en\u00edm a nejprve zkontrolovat, jak obr\u00e1zek vypad\u00e1, ne\u017e se pust\u00edte do dal\u0161\u00edho zv\u011bt\u0161ov\u00e1n\u00ed. Zkontrolujte detaily, kter\u00fdch si lid\u00e9 v\u0161imnou jako prvn\u00ed, jako jsou tv\u00e1\u0159e, text, vlasy, okraje a textury. Pokud st\u00e1le vypadaj\u00ed p\u0159irozen\u011b a nejsou p\u0159\u00edli\u0161 ostr\u00e9 nebo um\u011bl\u00e9, pravd\u011bpodobn\u011b jste pro dan\u00fd obr\u00e1zek na\u0161li spr\u00e1vnou \u00farove\u0148 zv\u011bt\u0161en\u00ed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bezplatn\u00e9 n\u00e1stroje pro zv\u011bt\u0161ov\u00e1n\u00ed rozli\u0161en\u00ed obr\u00e1zk\u016f pomoc\u00ed um\u011bl\u00e9 inteligence u\u017e u\u0161ly dlouhou cestu, ale v\u00fdb\u011br toho spr\u00e1vn\u00e9ho st\u00e1le vy\u017eaduje trochu p\u00e1tr\u00e1n\u00ed.  <\/p>\n","protected":false},"author":124,"featured_media":334900,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_eb_attr":"","footnotes":""},"categories":[9],"tags":[],"class_list":["post-334913","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized-cs"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Nejlep\u0161\u00ed bezplatn\u00e9 n\u00e1stroje pro zv\u011bt\u0161ov\u00e1n\u00ed obr\u00e1zk\u016f pomoc\u00ed um\u011bl\u00e9 inteligence, kter\u00e9 stoj\u00ed za vyzkou\u0161en\u00ed v roce 2026<\/title>\n<meta name=\"description\" content=\"Pot\u0159ebujete zv\u011bt\u0161it fotografii, ani\u017e byste p\u0159i\u0161li o p\u0159\u00edli\u0161 mnoho detail\u016f? Porovnejte sedm bezplatn\u00fdch n\u00e1stroj\u016f pro zv\u011bt\u0161ov\u00e1n\u00ed obr\u00e1zk\u016f pomoc\u00ed um\u011bl\u00e9 inteligence z hlediska rozli\u0161en\u00ed, ostrosti, kvality v\u00fdstupu, omezen\u00ed a snadnosti pou\u017eit\u00ed\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.skylum.com\/cs\/best-free-ai-image-upscalers\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nejlep\u0161\u00ed bezplatn\u00e9 n\u00e1stroje pro zv\u011bt\u0161ov\u00e1n\u00ed obr\u00e1zk\u016f pomoc\u00ed um\u011bl\u00e9 inteligence, kter\u00e9 stoj\u00ed za vyzkou\u0161en\u00ed v roce 2026\" \/>\n<meta property=\"og:description\" content=\"Pot\u0159ebujete zv\u011bt\u0161it fotografii, ani\u017e byste p\u0159i\u0161li o p\u0159\u00edli\u0161 mnoho detail\u016f? 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