Rank: 674 based on 191 downloads (last 30 days) and 5 files submitted
photo

Asad Ali

E-mail
Company/University
GIK Institute of Engineering Sciences & Technology

Personal Profile:

http://sites.google.com/site/asad82/


 

Watch this Author's files

 

Files Posted by Asad Ali View all
Updated   File Tags Downloads
(last 30 days)
Comments Rating
12 Jan 2010 Screenshot Spectral Clustering Algorithms Implementation of four key algorithms of Spectral Graph Clustering using eigen vectors : Tutorial Author: Asad Ali spectral clustering, graph segmentation, eigenvector segmentat..., affinity matrix, qmatrix, normalized cuts 78 0
  • 2.66667
2.7 | 6 ratings
06 Sep 2009 Reversible Watermarking by Difference Expansion Reversible Data Embedding Using Difference Expansion by J. Tian Author: Asad Ali difference expansion, reversible watermarki..., j tian, data hiding 42 4
  • 4.0
4.0 | 3 ratings
06 Sep 2009 Distortionless Data Hiding Based on Integer Wavelet Transform Lossless data hiding using Integer Wavelet transform by Guorong Xuan. (Reversible Watermarking) Author: Asad Ali reversible watermarki..., distortionless data h..., guorong xuan, integer wavelet trans... 46 3
  • 3.0
3.0 | 1 rating
29 Aug 2009 Blur and Affine Invariants Combined Blur and Affine Moment Invariants by Suk and Flusser. Author: Asad Ali blur invariants, affine invariants, combined blur and aff..., pose invariants, moment invariants 13 1
  • 4.0
4.0 | 1 rating
27 Nov 2006 Screenshot Contour Parameterization This function takes as input an image having white background and black foreground and traces the en Author: Asad Ali boundary following, contour following, affine contour follow..., conto 12 2
  • 3.33333
3.3 | 3 ratings
Comments and Ratings by Asad Ali
Updated File Comments Rating
21 Aug 2011 Distortionless Data Hiding Based on Integer Wavelet Transform Lossless data hiding using Integer Wavelet transform by Guorong Xuan. (Reversible Watermarking) Author: Asad Ali

In order to extract watermark after some distortion has taken place you have to use some error correcting codes such as BCH encoding. The watermark will first be BCH encoded and then embedded into the image. So at a later time while extracting after addition of noise the error correcting codes will compensate for the errors and recover the correct watermark. Check the matlab function "bchenc".

Comments and Ratings on Asad Ali's Files View all
Updated File Comment by Comments Rating
11 Apr 2014 Reversible Watermarking by Difference Expansion Reversible Data Embedding Using Difference Expansion by J. Tian Author: Asad Ali Mohsin

Please upload the decoder.m file if you have one.

13 Mar 2014 Spectral Clustering Algorithms Implementation of four key algorithms of Spectral Graph Clustering using eigen vectors : Tutorial Author: Asad Ali H

14 Feb 2014 Reversible Watermarking by Difference Expansion Reversible Data Embedding Using Difference Expansion by J. Tian Author: Asad Ali Aakash Aggarwal

How do we detect the watermark which is embedded here and if detected how to extract?
Is there a code for the extracting algorithm?

25 May 2013 Spectral Clustering Algorithms Implementation of four key algorithms of Spectral Graph Clustering using eigen vectors : Tutorial Author: Asad Ali Carlos Lara

26 Feb 2013 Reversible Watermarking by Difference Expansion Reversible Data Embedding Using Difference Expansion by J. Tian Author: Asad Ali long yin

Contact us