2013 Fiscal Year Final Research Report
Improvement of Image Compression Efficiency Using Information Hiding and Image Restoration
| Project/Area Number |
23560458
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Communication/Network engineering
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| Research Institution | Kyushu Institute of Technology |
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Principal Investigator |
NODA Hideki 九州工業大学, 大学院情報工学研究院, 教授 (80274554)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 情報ハイディング / 画質改善 / 画像圧縮 / カラー画像 / QIM / JPEG / MAP推定 |
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| Research Abstract |
An application of information hiding to image compression is investigated to improve compression efficiency for JPEG color images, where entropy coded discrete cosine transform (DCT) coefficients of chrominance components are embedded into DCT coefficients of luminance components. To recover an image from degradation caused by compression and embedding, an image restoration method based on the maximum a posteriori estimation is also applied. Experimental results show that information hiding improves compression efficiency slightly and image restoration improves it more than information hiding does. It is found that the use of both information hiding and image restoration is most effective to improve compression efficiency.
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