Chrominance watermark for mobile applications

Alastair Reed; Eliot Rogers; Dan James

doi:10.1117/12.839134

27 January 2010 Chrominance watermark for mobile applications

Alastair Reed, Eliot Rogers, Dan James

Proceedings Volume 7542, Multimedia on Mobile Devices 2010; 75420V (2010) https://doi.org/10.1117/12.839134
Event: IS&T/SPIE Electronic Imaging, 2010, San Jose, California, United States

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.

Citation Download Citation

Alastair Reed, Eliot Rogers, and Dan James "Chrominance watermark for mobile applications", Proc. SPIE 7542, Multimedia on Mobile Devices 2010, 75420V (27 January 2010); https://doi.org/10.1117/12.839134

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