2007 IEEE International Conference on Image Processing - San Antonio, Texas, U.S.A. - September 16-19, 2007

Technical Program

Paper Detail

Paper:TA-P2.12
Session:Security III: Watermarking
Time:Tuesday, September 18, 09:50 - 12:30
Presentation: Poster
Title: PERFORMANCE ANALYSIS OF TEXT HALFTONE MODULATION
Authors: Paulo Vinicius Koerich Borges; Federal University of Santa Catarina 
 Joceli Mayer; Federal University of Santa Catarina 
 Ebroul Izquierdo; Queen Mary, University of London 
Abstract: This paper analyzes the use of text halftone modulation (THM) as a text hardcopy watermarking method. Using THM, text characters in a document have their luminances modified from the standard black to a gray level generated with a given halftone screen, according to a message to be transmitted. The application of THM has been discussed in [3,6]. In this paper, a spectral metric is proposed to detect the embedded message. Based on this metric, an error rate analysis of halftone modulation is presented considering the effects of the print and scan channel. Experiments validate the analysis and the applicability of the method.



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