| Paper: | TA-P2.11 |
| Session: | Security III: Watermarking |
| Time: | Tuesday, September 18, 09:50 - 12:30 |
| Presentation: |
Poster
|
| Title: |
JOINT BI-WATERMARKING AND HALFTONING TECHNIQUE CAPABILITY FOR BOTH TAMPERED AREAS LOCALIZATION AND RECOVERY OF STILL IMAGE |
| Authors: |
Soo-Chang Pei; National Taiwan University | | |
| | Yi-Chong Zeng; National Taiwan University | | |
| Abstract: |
This paper presents a method to localize and to recover the tampered areas in the watermarked image simultaneously. First, the proposed watermarking algorithm aims to embed a bi-watermark, which is the binary halftone of the downscaled host image, into the host image. While the watermarked image is tampered unauthorizedly, the extracted bi-watermark can be exploited to localize the tampered areas automatically without initial bi-watermark. Subsequently, Gaussian lowpass filter and quadratic programming are used to restore the bi-watermark to gray-scale image for inverse halftoning procedure. Eventually, the restored gray-scale image is used to recover the tampered areas. |
