Share Email Print
cover

Proceedings Paper

Digital image watermarking on a special object: the human face
Author(s): HwangSeok Oh; Duk-Ho Chang; Choong-Hoon Lee; Heung-Kyu Lee
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

In this paper, we present a method for protection of digital contents by using the watermark embedding in special object, especially, human faces. To insert the watermark signals that are composed of noise like binary signals, we first localize the face regions within images by using the color and edge information. The skin color area is filtered out and then edge detector is applied for skin area to find out face features. These features are used for decision whether the skin area is face region or not. The face region is divide non-overlapping sub-blocks and a watermark bit is inserted into the each sub- block by considering the block activity. We insert a watermark bit in DCT domain of each sub-block. The level of modification of the DCT coefficients is determined considering the block variance. The non-zero coefficients of the DCT are selected and modified according to the robustness levels. Then, inverse DCT is performed. The extraction of the watermark is performed by comparing the original image in DCT domain. The robustness of the watermarking is similar to the other methods in DCT, but it has good visual qualities and less intended external piracy in terms of psychology.

Paper Details

Date Published: 9 May 2000
PDF: 9 pages
Proc. SPIE 3971, Security and Watermarking of Multimedia Contents II, (9 May 2000); doi: 10.1117/12.385009
Show Author Affiliations
HwangSeok Oh, Electronics and Telecommunications Research Institute (South Korea)
Duk-Ho Chang, Electronics and Telecommunications Research Institute (South Korea)
Choong-Hoon Lee, Korea Advanced Institute of Science and Technology (South Korea)
Heung-Kyu Lee, Korea Advanced Institute of Science and Technology (South Korea)


Published in SPIE Proceedings Vol. 3971:
Security and Watermarking of Multimedia Contents II
Ping Wah Wong; Edward J. Delp, Editor(s)

© SPIE. Terms of Use
Back to Top