(WO/2008/089377) A METHOD AND APPARATUS FOR STEGANALYSIS FOR TEXTURE IMAGES
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| Latest bibliographic data on file with the International Bureau
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| IPC: | G06T 1/00 (2006.01) | |||||||||||
| Applicants: | NEW JERSEY INSTITUTE OF TECHNOLOGY [US/US]; 323 Martin Luther King Blvd., University Heights, Newark, NJ 07102 (US) (All Except US). SHI, Yun, Qing [US/US]; (US) (US Only). CHEN, Chunhua [CN/US]; (US) (US Only). | |||||||||||
| Inventors: | SHI, Yun, Qing; (US). CHEN, Chunhua; (US). | |||||||||||
| Agent: | WYCHE, Myron, Keith; Connolly Bove Lodge & Hutz LLP, 1875 Eye Street, NW, Suite 1100, Washington, DC 20006 (US). | |||||||||||
| Priority Data: |
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| Title: | A METHOD AND APPARATUS FOR STEGANALYSIS FOR TEXTURE IMAGES | |||||||||||
| Abstract: | Embodiments of the invention are directed toward methods for steganalysis that improve the detection of steganography in texture images. The methods combine features extracted from the image spatial representation and from a block discrete cosine transform (BDCT) representation with multiple different block sizes (i.e., N X N) to improve detection of data hidden in texture images. Image data that is to undergo steganalysis can be provided to embodiments of the invention in at least one of spatial (pixel) and JPEG format. When JPEG format is provided, the image is first decompressed to spatial representation, from which the features are extracted when the block size is at least one 2x2, 4x4, and 16x 16. When the block size is 8x8, the JPEG coefficients (JPEG quantized 8x8 BDCT coefficients) derived directly from the JPEG image are used to extract features. In addition, the method is also effective as a universal steganalyzer for both texture and smooth/non-texture images. Embodiments of the invention also (1) utilize moments of 1 -D and 2-D characteristic functions; (2) Prediction-error; and (3) all wavelet subbands including the low-low subbands. | |||||||||||
| Designated States: |
AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. African Regional Intellectual Property Org. (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW) Eurasian Patent Organization (EAPO) (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM) European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, NO, PL, PT, RO, SE, SI, SK, TR) African Intellectual Property Organization (OAPI) (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). | |||||||||||
| Publication Language: | English (EN) |
| Filing Language: | English (EN) |
