| Presentation | 2009-05-28 Detecting Nonlinearly-Resized JPEG Images by Analyzing High-Frequency Elements in DCT Coefficients Tomoaki MATSUNAMI, Toshihiko YAMASAKI, Kiyoharu AIZAWA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we propose a method for detecting nonlinearly-resized JPEG images. We defined 8x8 periodic blocks as JPEG blocks. JPEG block boundaries are detected applying 8x8 block DCT to all the pixels of the input image and analyzing the high-frequency coefficients in them. If the JPEG block boundaries are not periodic by 8x8, the image is regarded as "forgery". In order to quantitatively analyze the degree of forgery, we have developed two approaches such as truth-score method and correlation-score method. Experimental results using 375 original (untouched) images and 375 nonlinearly-resized images demonstrated that our proposed method can classify them with over 90% of accuracy. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Image Forensics / Forgery Detection / JPEG Compression / DCT |
| Paper # | IE2009-12,PRMU2009-3,MI2009-3 |
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| Conference Information | |
| Committee | IE |
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| Conference Date | 2009/5/21(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Image Engineering (IE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Detecting Nonlinearly-Resized JPEG Images by Analyzing High-Frequency Elements in DCT Coefficients |
| Sub Title (in English) | |
| Keyword(1) | Image Forensics |
| Keyword(2) | Forgery Detection |
| Keyword(3) | JPEG Compression |
| Keyword(4) | DCT |
| 1st Author's Name | Tomoaki MATSUNAMI |
| 1st Author's Affiliation | Department of Information and Communication Engineering, The University of Tokyo() |
| 2nd Author's Name | Toshihiko YAMASAKI |
| 2nd Author's Affiliation | Department of Information and Communication Engineering, The University of Tokyo |
| 3rd Author's Name | Kiyoharu AIZAWA |
| 3rd Author's Affiliation | Department of Information and Communication Engineering, The University of Tokyo:Interfaculty Initiative in Information Studies, The University of Tokyo |
| Date | 2009-05-28 |
| Paper # | IE2009-12,PRMU2009-3,MI2009-3 |
| Volume (vol) | vol.109 |
| Number (no) | 63 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |