Wavelet and discrete cosine transforms for inserting information into BMP images

ANZIAM J. 48 (2006), 23-35

Wavelet and discrete cosine transforms for inserting information into BMP images

I. Orea-Flores
Unidad Profesional Interdisciplinaria
en Ingeniería y Tecnologas Avanzadas
Instituto Politécnico Nacional
Av. IPN 2580
La Laguna Ticomán
07340 México D.F.
iorea@ipn.mx

M. A. Acevedo
Sexyón de Estudios de Posgrado e Investigación Escuela Superior de Ingeniería Mecánica y Eléctrica Instituto Politécnico Nacional Edif. Z-4
3er piso. Col Lindavista
07738 México D.F.
macevedo@ipn.mx

and

J. López-Bonilla
Sexyón de Estudios de Posgrado e Investigación Escuela Superior de Ingeniería Mecánica y Eléctrica Instituto Politécnico Nacional Edif. Z-4
3er piso. Col Lindavista
07738 México D.F.
jlopezb@ipn.mx

Abstract

In this work we use the Discrete Wavelet Transform in watermarking applications for digital BMP images with the objective is to guarantee some level of security for the copyright. We also compare the results with the Discrete Cosine Transform for the same application. Results are obtained from a number of tests, primarily in order to validate the security level and the robustness of the watermark, but also to prove that the original image suffers only very small variations after the watermark is embedded. We also show how to embed the watermark, where to insert it and the capacity supported for inserting an image.

Download the article in PDF format (size 229 Kb)

Australian Mathematical Publishing Association Inc.