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Proceedings Paper

Chrominance watermark for mobile applications
Author(s): Alastair Reed; Eliot Rogers; Dan James
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Paper Abstract

Creating an imperceptible watermark which can be read by a broad range of cell phone cameras is a difficult problem. The problems are caused by the inherently low resolution and noise levels of typical cell phone cameras. The quality limitations of these devices compared to a typical digital camera are caused by the small size of the cell phone and cost trade-offs made by the manufacturer. In order to achieve this, a low resolution watermark is required which can be resolved by a typical cell phone camera. The visibility of a traditional luminance watermark was too great at this lower resolution, so a chrominance watermark was developed. The chrominance watermark takes advantage of the relatively low sensitivity of the human visual system to chrominance changes. This enables a chrominance watermark to be inserted into an image which is imperceptible to the human eye but can be read using a typical cell phone camera. Sample images will be presented showing images with a very low visibility which can be easily read by a typical cell phone camera.

Paper Details

Date Published: 28 January 2010
PDF: 8 pages
Proc. SPIE 7542, Multimedia on Mobile Devices 2010, 75420V (28 January 2010); doi: 10.1117/12.839134
Show Author Affiliations
Alastair Reed, Digimarc Corp. (United States)
Eliot Rogers, Digimarc Corp. (United States)
Dan James, Digimarc Corp. (United States)


Published in SPIE Proceedings Vol. 7542:
Multimedia on Mobile Devices 2010
Reiner Creutzburg; David Akopian, Editor(s)

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