Title page for ETD etd-04082005-125138


Type of Document Master's Thesis
Author Ashfaq, Naveed Shaik
Author's Email Address ashaik1@lsu.edu
URN etd-04082005-125138
Title Improved Watermarking Scheme Using Decimal Sequences
Degree Master of Science in Electrical Engineering (M.S.E.E.)
Department Electrical & Computer Engineering
Advisory Committee
Advisor Name Title
Subhash Kak Committee Chair
Suresh Rai Committee Member
Xue-Bin Liang Committee Member
Keywords
  • spread spectrum
  • image
  • sequences
  • pseudorandom
Date of Defense 2005-03-29
Availability unrestricted
Abstract
This thesis improves upon the work carried out by Mandhani on decimal sequence watermarking showing that the embedding and decoding algorithms used by Mandhani are not robust. We next specify improvements to these algorithms so that the peak signal to noise ratio (PSNR) is maximized and the distortion introduced in the image due to the embedding is minimized. By exploiting the cross correlation property of decimal sequences, the concept of embedding more than one watermark in the same cover image has been investigated. A comparison between the PSNRs for decimal sequence watermarking and other pseudorandom sequences has been made.
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