- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
Effective Image Watermarking Method Based on DCT | ||
| Iraqi Journal of Science | ||
| Article 1, Volume 56, Issue 3, 2015, Pages 2374-2379 | ||
| Authors | ||
| Loay E. George; Faisel G. Mohammed; Ibtisam A. Taqi | ||
| Abstract | ||
| Most includeding techniques of digital watermark even now working through the direct inclusion in the pixel without taking into account the level of compression (attack) that can go wrong, which makes digital watermark can be discarded easily. In this research, a method was proposed to overcome this problem, which is based on DCT (after image partitioned into non overlapped blocks with size 8×8 pixel), accompanied by a quantization method. The watermark (digital image) is embedded in DCT frequency domain seeking the blocks have highest standard deviation (the checking is only on the AC coefficients) within a predetermined threshold value, then the covered image will compressed (attacked) varying degrees of compression. The suggested methodology enables user to extract digital watermark even when the digital image compressed to low level bit ratios was showed in tables. | ||
| Keywords | ||
| Digital Watermarking; JPEG compression; DCT; Coefficients Quantization | ||
|
Statistics Article View: 136 PDF Download: 56 |
||