{"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\/es\/blog\/news\/predstavlen-unredacter-instrument-dlya-opredeleniya-pikselizirovannogo-teksta","title":{"rendered":"Se presenta Unredacter, una herramienta para identificar texto pixelado.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Se presenta la herramienta Unredacter, que permite restaurar el texto original despu\u00e9s de que ha sido ocultado mediante filtros basados en pixelaci\u00f3n. Por ejemplo, el programa puede ser utilizado para identificar datos confidenciales y contrase\u00f1as que han sido pixelados en capturas de pantalla o im\u00e1genes de documentos. Se afirma que el algoritmo implementado en Unredacter supera utilidades similares previamente disponibles, como Depix, y ha sido utilizado con \u00e9xito para pasar la prueba de detecci\u00f3n de texto pixelado propuesta por el laboratorio Jumpsec. El c\u00f3digo del programa est\u00e1 escrito en TypeScript y se distribuye bajo la licencia GPLv3. <\/p>\n

Para restaurar el texto en Unredacter se aplica un m\u00e9todo de prueba y error, mediante el cual se compara una parte de la imagen pixelada original con una opci\u00f3n que se sintetiza mediante la b\u00fasqueda de combinaciones de caracteres, pixelados con diferentes desplazamientos y caracter\u00edsticas modificadas. Durante el proceso, se elige gradualmente la opci\u00f3n que m\u00e1s se asemeja al fragmento original. Para un funcionamiento exitoso, se requiere adivinar correctamente el tama\u00f1o, tipo y par\u00e1metros del espaciado de la fuente, as\u00ed como calcular el tama\u00f1o de la celda en la cuadr\u00edcula de pixelaci\u00f3n y la posici\u00f3n de superposici\u00f3n de esta cuadr\u00edcula sobre el texto (las opciones de desplazamiento de la cuadr\u00edcula se seleccionan autom\u00e1ticamente).

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

Adicionalmente, se puede mencionar el proyecto DepixHMM, en el cual se ha preparado una variante de la herramienta Depix, adaptada a un algoritmo basado en un modelo oculto de Markov, que ha logrado aumentar la precisi\u00f3n en la recreaci\u00f3n de los caracteres.
\n
Fuente: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\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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