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Abstrakt
It is a common task in image lossy compression to provide a reasonable trade-off between a desired compression ratio (as large as possible) and an appropriate (preset according to a chosen metric) quality. Recently, a Better Portable Graphics (BPG) coder has been proposed that might become a new standard. A quality parameter Q is used in it to vary image quality and compression ratio. However, a given Q for particular images to be compressed produces quite different compression ratios and quality measured by a given quality metric. To provide a given quality of compressed images characterized by a visual quality metric FSIMc, we propose and analyze a two-step algorithm based on preliminary obtained average rate/distortion curve and its linear approximation. For this algorithm, the second step that calculates the improved estimate of Q and employs it for final compression allows decreasing variance of the produced FSIMc by about one order of magnitude compared to the first compression step where Q is set according to the average rate-distortion curve. The algorithm is applied for a wide set of desired values of FSIMc. It is also tested for a set of images not used in obtaining the average rate/distortion curve.
Cytowania
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5
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0
Web of Science
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6
Scopus
Autorzy (4)
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Fangfang Li
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Vladimir Lukin
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Yanjun Fu
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Informacje szczegółowe
- Kategoria:
- Inna publikacyjna praca zbiorowa (w tym materiały konferencyjne)
- Typ:
- Inna publikacyjna praca zbiorowa (w tym materiały konferencyjne)
- Tytuł wydania:
- 2021 IEEE 3rd International Conference on Advanced Trends in Information Theory (ATIT) strony 10 - 14
- Rok wydania:
- 2021
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1109/atit54053.2021.9678522
- Weryfikacja:
- Brak weryfikacji
wyświetlono 17 razy
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