{"id":114785,"date":"2024-04-04T12:25:48","date_gmt":"2024-04-04T10:25:48","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/google-predstavil-biblioteku-jpegli-dlya-bolee-effektivnogo-szhatiya-jpeg-izrbrazhenij"},"modified":"2024-04-04T12:25:48","modified_gmt":"2024-04-04T10:25:48","slug":"google-predstavil-biblioteku-jpegli-dlya-bolee-effektivnogo-szhatiya-jpeg-izrbrazhenij","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/google-predstavil-biblioteku-jpegli-dlya-bolee-effektivnogo-szhatiya-jpeg-izrbrazhenij","title":{"rendered":"Google ha presentato la libreria jpegli per una compressione JPEG pi\u00f9 efficiente.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Google ha rilasciato una nuova libreria open source chiamata jpegli, che implementa un codificatore e un decodificatore di immagini in formato JPEG. La libreria include ottimizzazioni aggiuntive per migliorare l'efficienza della codifica, consentendo un aumento del 35% del livello di compressione delle immagini di alta qualit\u00e0 rispetto ai codec JPEG tradizionali. Rispetto a libjpeg-turbo, la libreria jpegli riesce a ottenere un livello di qualit\u00e0 analogo riducendo il bitrate del 32%. A livello di API e ABI, la libreria \u00e8 completamente compatibile con libjpeg62 e pu\u00f2 essere utilizzata come sostituzione trasparente. Il codice della libreria \u00e8 scritto in C++ e distribuito con licenza BSD.

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

L'aumento del livello di compressione \u00e8 ottenuto attraverso l'uso di tecnologie avanzate per ridurre il rumore delle immagini e migliorare la qualit\u00e0, impiegando metodi pi\u00f9 efficaci di modellazione psicovisiva per ridurre gli artefatti. In particolare, jpegli utilizza un'euristica adattativa di quantizzazione, adottata dal progetto JPEG XL, e algoritmi migliorati per la selezione delle matrici di quantizzazione e il calcolo dei risultati intermedi. <\/p>\n

La libreria jpegli consente di codificare immagini con una profondit\u00e0 di 10 bit o pi\u00f9 per componente di colore. Il risultato dei nuovi algoritmi di codifica si adatta al tradizionale modello JPEG, che limita l'uso a 8 bit per componente di colore. Questa caratteristica consente di mantenere la compatibilit\u00e0 con i decodificatori esistenti progettati per la rappresentazione a 8 bit delle componenti colore. <\/p>\n

Le immagini codificate con jpegli sono pienamente conformi allo standard JPEG, non richiedono decodificatori specifici e possono essere visualizzate con i visualizzatori JPEG e i browser web esistenti. L'uso di un proprio decodificatore per decomprimere le immagini compresse con jpegli riduce ulteriormente gli artefatti. La velocit\u00e0 di codifica con jpegli \u00e8 comparabile a quella delle librerie libjpeg-turbo e MozJPEG.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Google \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \u043d\u043e\u0432\u0443\u044e \u043e\u0442\u043a\u0440\u044b\u0442\u0443\u044e \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0443 jpegli \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u0438 \u0434\u0435\u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u0438\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u0439 \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 JPEG. \u0411\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 \u0432\u043a\u043b\u044e\u0447\u0430\u0435\u0442 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0438 \u0434\u043b\u044f \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u044f \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u0438 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043d\u0430 35% \u0443\u0432\u0435\u043b\u0438\u0447\u0438\u0442\u044c \u0441\u0442\u0435\u043f\u0435\u043d\u044c \u0441\u0436\u0430\u0442\u0438\u044f \u0432\u044b\u0441\u043e\u043a\u043e\u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u044b\u0445 \u0438\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u0439, \u043f\u043e \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u044e \u0441 \u0442\u0440\u0430\u0434\u0438\u0446\u0438\u043e\u043d\u043d\u044b\u043c\u0438 \u043a\u043e\u0434\u0435\u043a\u0430\u043c\u0438 JPEG. \u0412 \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u0438 \u0441 libjpeg-turbo \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 jpegli \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0430\u043d\u0430\u043b\u043e\u0433\u0438\u0447\u043d\u043e\u0433\u043e \u0443\u0440\u043e\u0432\u043d\u044f \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0430 \u043f\u0440\u0438 \u0441\u043d\u0438\u0436\u0435\u043d\u0438\u0438 \u0431\u0438\u0442\u0440\u0435\u0439\u0442\u0430 \u043d\u0430 32%. \u041d\u0430 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":114786,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-114785","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\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\n","aioseo_head_json":{"title":"\ud83e\udd47Google ha presentato la libreria jpegli per una compressione JPEG pi\u00f9 efficiente | ProHoster","description":"Google ha presentato una nuova libreria open source chiamata jpegli, che include un encoder e un decoder per le immagini in formato JPEG. La libreria offre ottimizzazioni aggiuntive per migliorare l'efficienza della codifica, consentendo di aumentare del 35% il livello di compressione delle immagini di alta qualit\u00e0 rispetto ai tradizionali codec JPEG. Rispetto a libjpeg-turbo, la libreria jpegli raggiunge un livello di qualit\u00e0 simile riducendo il bitrate del 32%. 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