Embedding Dual Watermark in the G-Channel Image Using DCT and 2-D Walsh Code

Autoři

  • B. P. Mishra
  • H.N. Pratihari
  • P. Das

Abstrakt

This paper uses two dimensional Walsh coding for blind twofold watermarking algorithm which mixes robust copyright watermark and authentication information into various color images to maintain the copyright ownership of the host images. First watermark i.e. fingerprint image is embedded in the DCT low frequency coefficients of the G-channel image of host image where as the second watermark i.e. mobile phone number is embedded in the DCT block of G-channel image by modifying the low frequency band, excluding the DC components. During the decoding process the primary fingerprint image is used as authentication matching for extraction of mobile phone number. The new algorithm uses extra security by the use of biometric authentication process of decoding. The two dimensional Walsh coding and decoding is used to maintain the robustness. The new algorithm produces more similarity structure index measure (SSIM) and peak signal to noise ratio (PSNR) values. Various JPEG quality factors with and without Walsh coding are tested below which watermark can be recovered. The algorithm was successfully tested on a variety of 512X512 colour images and also verified against various attacks through StirMark attacks and their NC values. Keywords: Watermarking, DCT, G-channel, colour images, 2-D Walsh code   Cite this Article Mishra BP, Pratihari HN, Das P. Embedding Dual Watermark in the G-Channel Image Using DCT and 2-D Walsh Code. Current Trends in Signal Processing. 2015; 5(2): 27-34p. 

Stažení

Publikováno

2015-07-10

Číslo

Vol 5 No 2 (2015)

Sekce

Research Articles

Licence

Declaration and Copyright Transfer Form

(to be completed by authors)

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

·         I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.

·         I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).

·         I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.

·          I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

_______________

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.