Asma Ahmad

Work place: Department of Electronics & Telecommunication Engineering, Shri Shankaracharya Technical Campus Bhilai, India

E-mail: asma.ahmad28@gmail.com

Website:

Research Interests: Computer systems and computational processes, Embedded System, Image Compression, Image Manipulation, Image Processing

Biography

Asma Ahmad has received the BE degree from Chouksey Engineering College Bilaspur in Electronics and Telecommunication Engineering in 2008. She is working towards the M.E. degree in Communication from Shri Shankaracharya Technical Campus Bhilai. Her areas of   interests include digital image processing, embedding system and biometric system.

Author Articles
3-Level DWT Image Watermarking Against Frequency and Geometrical Attacks

By Asma Ahmad G.R.Sinha Nikita Kashyap

DOI: https://doi.org/10.5815/ijcnis.2014.12.07, Pub. Date: 8 Nov. 2014

This paper introduces a robust image watermarking technique for the copyright protection. The proposed method is based on 3-level discrete wavelet transform (DWT). Encoded secret image using spiral scanning is hidden by alpha blending technique in LL sub bands. During embedding process, secret image is dispersed within LL band depending upon alpha value. Encoded secret images are extracted and decoded to recover the original secret image. The experimental results demonstrate that the watermarks generated with the proposed algorithm are invisible and the quality of watermarked image and the recovered image are improved. The scheme is found robust to various image processing attacks such as JPEG compression, Gaussian noise, blurring, median filtering and rotation.

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