Rank: 314 based on 198 downloads (last 30 days) and 5 files submitted
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Asad Ali

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

Personal Profile:

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

Professional Interests:
Affine Invariants, Robotic Vision, AI, Intelligent Transportation Systems, Segmentation, Watermarking

 

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Files Posted by Asad View all
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(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, normalized cuts, qmatrix, affinity matrix, eigenvector segmentat... 102 0
  • 3.0
3.0 | 2 ratings
06 Sep 2009 Reversible Watermarking by Difference Expansion Reversible Data Embedding Using Difference Expansion by J. Tian Author: Asad Ali data hiding, j tian, reversible watermarki..., difference expansion 32 1
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 integer wavelet trans..., distortionless data h..., guorong xuan, reversible watermarki... 47 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 moment invariants, combined blur and aff..., affine invariants, pose invariants, blur invariants 11 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 6 2
  • 3.33333
3.3 | 3 ratings
Comments and Ratings by Asad
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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's Files View all
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10 Nov 2011 Spectral Clustering Algorithms Implementation of four key algorithms of Spectral Graph Clustering using eigen vectors : Tutorial Author: Asad Ali xuzhen, qin
30 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 ananthan, lavanya

After adding noise to whole image,i am getting following errors
>The symbol counts parameter must be a vector of positive finite integers.
>CH5 = arithdeco(seq11,count1,size(CH,1)*size(CH,2));
 
help?
24 Aug 2011 Reversible Watermarking by Difference Expansion Reversible Data Embedding Using Difference Expansion by J. Tian Author: Asad Ali zhu

I'm learning the reversible watermarking,thanks.
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 Ali, Asad

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".
18 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 ananthan, lavanya

Watermark can't extracted from distorted watermark (eg distorted by speckle noise) any help?
Top Tags Applied by Asad
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reversible watermarking, affine contour following, affine invariants, affinity matrix, blur invariants
Files Tagged by Asad View all
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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, normalized cuts, qmatrix, affinity matrix, eigenvector segmentat... 102 0
  • 3.0
3.0 | 2 ratings
06 Sep 2009 Reversible Watermarking by Difference Expansion Reversible Data Embedding Using Difference Expansion by J. Tian Author: Asad Ali data hiding, j tian, reversible watermarki..., difference expansion 32 1
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 integer wavelet trans..., distortionless data h..., guorong xuan, reversible watermarki... 47 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 moment invariants, combined blur and aff..., affine invariants, pose invariants, blur invariants 11 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 6 2
  • 3.33333
3.3 | 3 ratings

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