Anu Pramila, Anja Keskinarkaus, Tapio Seppänen, Increasing the capturing angle in print-cam robust watermarking, Journal of Systems and Software, Volume 135, 2018, Pages 205-215, ISSN 0164-1212, https://doi.org/10.1016/j.jss.2017.10.029
Increasing the capturing angle in print-cam robust watermarking
|Author:||Pramila, Anu1; Keskinarkaus, Anja1; Seppänen, Tapio1|
1Physiological Signal Analysis Team, Center for Machine Vision and Signal Analysis, University of Oulu, Oulu, Finland
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2019052717250
|Publish Date:|| 2020-01-31
It is nowadays more probable that a print media is captured and shared with a mobile phone than with a scanner. The reasons for photographing the print range from intention of copying the image to simply sharing an interesting add with friends. Watermarking offers a solution for carrying side information in the images, and if the watermarking method being used is robust to the print-cam process, the information can be read with a mobile phone camera. In this paper, we present a print-cam robust watermarking method that is also implemented on a mobile phone and evaluated with user tests. Especially, the lens focusing problem when the picture is captured in a wide angle with respect to the printout is addressed. The results show that the method is highly robust to capturing the watermark without errors in angles up to 60° with processing times that are acceptable for real-life applications.
Journal of systems and software
|Pages:||205 - 215|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
113 Computer and information sciences
© 2017 Elsevier Inc. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.