| Item type |
紀要論文 / Departmental Bulletin Paper(1) |
| 公開日 |
2023-03-30 |
| タイトル |
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|
タイトル |
Visual Quality Balancing between Enhanced High-resolution and OrdinaryJPEG-decoded Images in Steganographic Image Compression System |
| 言語 |
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|
言語 |
eng |
| キーワード |
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主題Scheme |
Other |
|
主題 |
steganography, image enhancement, JPEG compression, Watson’s model, JND |
| 資源タイプ |
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|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
departmental bulletin paper |
| 著者 |
古川, 功
鈴木, 純司
Isao, FURUKAWA
Junji, SUZUKI
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| 抄録 |
|
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内容記述タイプ |
Abstract |
|
内容記述 |
The steganographic image compression system provides a coding method that is compatible with standard JPEG, but allows only users who know that the information of higher frequency components is embedded to obtain enhanced high-resolution images at the same time. Until now, the main focus has been on improving the quality of high-resolution images by embedding as many codes as possible in lower frequency DCT coefficients. However, this conventional method leads to greater degradation in JPEG-decoded low-resolution images, and it is not appropriate to prioritize high-resolution images over low-resolution images because of the inherent duality of providable resolution images by the system. Therefore, in this study, we employ Watson’s model to evaluate the distortion caused by embedding enhancement codes to lower frequency, and extend the perceptual model to higher frequency by extrapolating DCT frequency sensitivity values to calculate visual distortion of higher frequency DCT coefficients when they are discarded due to a constraint of payload. In addition, we propose a visual quality balancing (VQB) algorithm for low- and high-resolution images by successively comparing their perceptual distances during enhancement code embedding. Finally, we demonstrate the effectiveness of the proposed algorithm through simulation experiments on standard test images with 4K resolution. |
| 書誌情報 |
広島工業大学紀要. 研究編
巻 56,
p. 35-48,
発行日 2022-03
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| 出版者 |
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|
出版者 |
広島工業大学 |
| ISSN |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
13469975 |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA11599110 |
| 権利 |
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権利情報 |
publisher |
| フォーマット |
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内容記述タイプ |
Other |
|
内容記述 |
application/pdf |
research56_035-048.pdf (14.9 MB)
