A Novel Approach of Image Enhancement using Steganographic Data Embedding and JPEG Scheme
URI | http://harp.lib.hiroshima-u.ac.jp/it-hiroshima/metadata/12061 | ||||||||||||
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ファイル |
research48_093-103.pdf
( 2.0 MB )
公開日
:2022-05-13
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タイトル |
A Novel Approach of Image Enhancement using Steganographic Data Embedding and JPEG Scheme
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著者 |
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キーワード |
image communication
steganography
image enhancement
JPEG compression
DCT
entropy coding
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抄録 |
We propose a new image enhancement method for JPEG images on the Internet that a sender who has high resolution images embeds enhancement codes for representing high frequency DCT coefficients into low frequency DCT coefficients, and receivers recover either low resolution JPEG coded images by using conventional JPEG decoder or high resolution images by using code extraction from low frequency DCT coefficients. This image transmission method can be thought as so called steganographic communication in case that these enhancement codes are kept secret. In order to implement the steganographic image communication, after the DCT size is extended from 8×8 to 16 × 16, SNRs are measured for images not only with setting all high frequency coefficients greater than 8×8 size to zeros, then processing IDCT of 16×16 size, but also with processing IDCT of 8×8 size. A scanning method for high frequency DCT coefficients is also proposed. The simulation experiments show the amount of enhancement codes for recovering quantized high frequency DCT coefficients and SNRs without embedding enhancement codes into low frequency DCT coefficients. |
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掲載雑誌名 |
広島工業大学紀要. 研究編
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巻 |
48
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開始ページ |
93
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終了ページ |
103
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出版年月日 |
2014-02
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ISSN |
1346-9975
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NCID |
AA11599110
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本文言語 |
日本語
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資料タイプ |
紀要論文
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著者版フラグ |
出版社版
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区分 |
it-hiroshima
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