Colour image watermarking based on wavelet and QR decomposition

TitreColour image watermarking based on wavelet and QR decomposition
Type de publicationCommunication
TypeCommunication avec actes dans un congrès
Année2017
LangueAnglais
Date du colloque15-18/05/2017
Titre du colloque2017 25th Signal Processing and Communications Applications Conference (SIU)
Titre des actes ou de la revue2017 25th Signal Processing and Communications Applications Conference (SIU)
Pagination1-4
AuteurRasti, Pejman , Demirel, Hasan
PaysTurquie
EditeurIEEE
VilleAntalya
ISBN978-1-5090-6494-6
Mots-clésCZT, digital Image Watermarking, DWT, entropy, QR, SVD
Résumé en anglais

In this work, a new image watermarking algorithm on colour images is proposed. The proposed algorithm divides a cover image into three colour bands of red, green and blue. Then the following tasks are done on all three channels separately. First, Each colour band is divided into patches of small sizes then the entropy of each patch is calculated. At this step a threshold is found based on the average entropy of all patches and following is applied to all patches which have entropy lower than the threshold. A wavelet representation of each patch are given by applying a discrete wavelet transform. Then Singular value decomposition, orthogonal-triangular decomposition, and a chirp z-transform are used to embed a watermark on the cover image. Several signal processing attacks are applied on watermarked images in order to robustness of the algorithm. The Proposed algorithm is compared with one conventional and two state-of-the-art algorithms. Experimental results show superiority of the proposed algorithm compare with other algorithm in the area of image watermarking.

URL de la noticehttp://okina.univ-angers.fr/publications/ua17499
DOI10.1109/SIU.2017.7960259
Lien vers le document en ligne

https://ieeexplore.ieee.org/document/7960259/