Additive spread-spectrum watermark detection in demosaicked images
Peter Meerwald and Andreas Uhl
Proceedings of the ACM Multimedia and Security Workshop, MMSEC '09
Princeton, NJ, USA; September 7 - 8, 2009
In this paper we investigate watermarking of digital camera raw images
and blind detection of spread-spectrum watermarks in demosaicked
images. We propose straightforward watermark embedding in sensor data
combined with a novel detector.
To this end, we extend a detection approach which adaptively combines
the components of the demosaicked image to take advantage of the
interpolated and correlated image structure within and between color
channels. Experimental results confirm the benefits of the novel
detection approach. Further, we experimentally assess the impact of
several demosaicking methods on the detection performance.
Peter Meerwald, firstname.lastname@example.org