{"id":103361,"date":"2022-02-16T21:37:38","date_gmt":"2022-02-16T19:37:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/predstavlen-unredacter-instrument-dlya-opredeleniya-pikselizirovannogo-teksta"},"modified":"2022-02-16T21:37:38","modified_gmt":"2022-02-16T19:37:39","slug":"predstavlen-unredacter-instrument-dlya-opredeleniya-pikselizirovannogo-teksta","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/predstavlen-unredacter-instrument-dlya-opredeleniya-pikselizirovannogo-teksta","title":{"rendered":"Byl p\u0159edstaven Unredacter, n\u00e1stroj pro odhalov\u00e1n\u00ed pixelizovan\u00e9ho textu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Byl p\u0159edstaven n\u00e1stroj Unredacter, kter\u00fd umo\u017e\u0148uje obnovit p\u016fvodn\u00ed text pot\u00e9, co byl skryt pomoc\u00ed filtr\u016f zalo\u017een\u00fdch na pixelizaci. Nap\u0159\u00edklad program m\u016f\u017ee b\u00fdt pou\u017eit k identifikaci citliv\u00fdch \u00fadaj\u016f a hesel, kter\u00e9 byly zpixelizov\u00e1ny na sn\u00edmc\u00edch obrazovky nebo kopi\u00edch dokument\u016f. Tvrd\u00ed se, \u017ee algoritmus implementovan\u00fd v Unredacteru p\u0159ekon\u00e1v\u00e1 d\u0159\u00edve dostupn\u00e9 podobn\u00e9 n\u00e1stroje, jako je Depix, a \u00fasp\u011b\u0161n\u011b pro\u0161el testem na identifikaci pixelizovan\u00e9ho textu, navr\u017een\u00fdm laborato\u0159\u00ed Jumpsec. K\u00f3d programu je naps\u00e1n v TypeScriptu a je distribuov\u00e1n pod licenc\u00ed GPLv3. <\/p>\n

Pro obnovu textu v Unredacteru se pou\u017e\u00edv\u00e1 metoda zp\u011btn\u00e9ho odhadu, p\u0159i kter\u00e9 se prov\u00e1d\u00ed porovn\u00e1n\u00ed \u010d\u00e1sti p\u016fvodn\u00edho pixelizovan\u00e9ho obrazu s variantou syntetizovanou kombinac\u00ed r\u016fzn\u00fdch dvojic znak\u016f, pixelizovan\u00fdch s r\u016fzn\u00fdmi posuny a zm\u011bn\u011bn\u00fdmi charakteristikami. B\u011bhem tohoto procesu se postupn\u011b vyb\u00edr\u00e1 varianta, kter\u00e1 nejbl\u00ed\u017ee odpov\u00edd\u00e1 p\u016fvodn\u00edmu fragmentu. Pro \u00fasp\u011b\u0161n\u00e9 fungov\u00e1n\u00ed je pot\u0159eba spr\u00e1vn\u011b odhadnout velikost, typ a parametry odsazen\u00ed p\u00edsma, stejn\u011b jako vypo\u010d\u00edtat velikost bu\u0148ky v m\u0159\u00ed\u017ece pixelizace a pozici p\u0159ekryvu t\u00e9to m\u0159\u00ed\u017eky na textu (varianty posunut\u00ed m\u0159\u00ed\u017eky se zkou\u0161ej\u00ed automaticky).

\"Byl<\/center> <\/p>\n

D\u00e1le lze zm\u00ednit projekt DepixHMM, v r\u00e1mci kter\u00e9ho byla p\u0159ipravena varianta n\u00e1stroje Depix, p\u0159eveden\u00e1 na algoritmus zalo\u017een\u00fd na skryt\u00e9 Markovsk\u00e9 modelu, d\u00edky n\u011bmu\u017e se poda\u0159ilo dos\u00e1hnout zv\u00fd\u0161en\u00ed p\u0159esnosti rekonstrukce znak\u016f.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439 Unredacter, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c \u0438\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u044b\u0439 \u0442\u0435\u043a\u0441\u0442, \u043f\u043e\u0441\u043b\u0435 \u0435\u0433\u043e \u0441\u043a\u0440\u044b\u0442\u0438\u044f \u0441 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435\u043c \u0444\u0438\u043b\u044c\u0442\u0440\u043e\u0432 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043f\u0438\u043a\u0441\u0435\u043b\u0438\u0437\u0430\u0446\u0438\u0438. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0430 \u043c\u043e\u0436\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0434\u043b\u044f \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043a\u043e\u043d\u0444\u0438\u0434\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438 \u043f\u0430\u0440\u043e\u043b\u0435\u0439, \u043f\u0438\u043a\u0441\u0435\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043d\u0430 \u0441\u043a\u0440\u0438\u043d\u0448\u043e\u0442\u0430\u0445 \u0438\u043b\u0438 \u0441\u043d\u0438\u043c\u043a\u0430\u0445 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u043e\u0432. \u0423\u0442\u0432\u0435\u0440\u0436\u0434\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0432 Unredacter \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c \u043f\u0440\u0435\u0432\u043e\u0441\u0445\u043e\u0434\u0438\u0442 \u0440\u0430\u043d\u0435\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b\u0435 \u0430\u043d\u0430\u043b\u043e\u0433\u0438\u0447\u043d\u044b\u0435 \u0443\u0442\u0438\u043b\u0438\u0442\u044b, \u0442\u0430\u043a\u0438\u0435 \u043a\u0430\u043a Depix, \u0438 \u0432 \u0442\u043e\u043c \u0447\u0438\u0441\u043b\u0435 \u0443\u0441\u043f\u0435\u0448\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d \u0434\u043b\u044f \u043f\u0440\u043e\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u0442\u0435\u0441\u0442\u0430 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":103362,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-103361","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47P\u0159edstaven Unredacter, n\u00e1stroj pro identifikaci pixelizovan\u00e9ho textu | ProHoster","description":"Byl p\u0159edstaven n\u00e1stroj Unredacter, kter\u00fd umo\u017e\u0148uje obnovit p\u016fvodn\u00ed text pot\u00e9, co byl skryt pomoc\u00ed filtr\u016f zalo\u017een\u00fdch na 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