{"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\/it\/blog\/news\/predstavlen-unredacter-instrument-dlya-opredeleniya-pikselizirovannogo-teksta","title":{"rendered":"\u00c8 stato presentato Unredacter, uno strumento per identificare il testo pixelato","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\u00c8 stato presentato lo strumento Unredacter, che consente di ripristinare il testo originale dopo che \u00e8 stato nascosto utilizzando filtri basati su pixelizzazione. Ad esempio, il programma pu\u00f2 essere utilizzato per identificare dati riservati e password pixelati in screenshot o fotografie di documenti. Si afferma che l'algoritmo implementato in Unredacter superi le utility analoghe precedentemente disponibili, come Depix, ed \u00e8 stato anche utilizzato con successo per superare il test di identificazione del testo pixelato proposto dal laboratorio Jumpsec. Il codice del programma \u00e8 scritto in TypeScript e distribuito con licenza GPLv3. <\/p>\n

Per ripristinare il testo in Unredacter viene utilizzato un metodo di riconoscimento inverso, secondo il quale si confronta una parte dell'immagine pixelata originale con una variante sintetizzata mediante l'estrazione casuale di coppie di caratteri, pixelati con vari spostamenti e caratteristiche modificate. Durante il processo, viene gradualmente identificata l'opzione che corrisponde pi\u00f9 da vicino al frammento originale. Per un funzionamento efficace \u00e8 necessario indovinare correttamente le dimensioni, il tipo e le impostazioni del carattere, cos\u00ec come calcolare le dimensioni della cella nella griglia di pixelizzazione e la posizione di sovrapposizione di tale griglia sul testo (le opzioni di sovrapposizione sono esaminate automaticamente).

\"\u00c8<\/center> <\/p>\n

In aggiunta, si pu\u00f2 notare il progetto DepixHMM, nell'ambito del quale \u00e8 stata preparata una variante dello strumento Depix, tradotta su un algoritmo basato su modelli markoviani occulti, che ha consentito di migliorare la precisione nella ricostruzione dei caratteri.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\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 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