Paper Info
Title
Watermark Capacity Measure Incorporating A Model Of The Human Visual System
Abstract
The problem of evaluating the maximum number of information bits that can be hidden within an image through digital watermarking is considered. By relying on experimental results in which the capacity of the watermark-channel is measured and the dependence of the watermark capacity upon the watermark strength is evidenced., the knowledge of the maximum allowed watermark level, under the constraint of watermark invisibility, is required. Watermark energy is often interactively adjusted to the image at hand, due to some problems with Human Visual System models currently in use. Hence, a novel algorithm modeling HVS characteristics is developed: the proposed method exploits a block based DCT decomposition of the image, that permits to trade off between spatial and frequency localisation of the image features and disturbs. The model takes into account the non-sinusoidal nature of both the masking signal (i.e. the host image) and the disturbing signal (the watermark). Through this model, the maximum allowable watermark strength is achieved in a completely automatic mode and the watermark capacity measure is computed.
Year
DOI
Venue
2001
10.1117/12.435432
SECURITY AND WATERMARKING OF MULTIMEDIA CONTENTS III
Keywords
Field
DocType
digital image watermarking, frequency-domain watermarking, watermark capacity, Human Visual System models, watermark strength
Computer vision,Digital watermarking,Feature (computer vision),Human visual system model,Discrete cosine transform,Communication channel,Digital image,Watermark,Artificial intelligence,Spatial frequency,Physics
Conference
Volume
ISSN
Citations 
4314
0277-786X
2
PageRank 
References 
Authors
0.40
0
4
Name
Order
Citations
PageRank
Alessia De Rosa131220.66
M. Barni23091246.21
franco bartolini353957.39
Alessandro Piva42231157.21