Ismail Ben Ayed

Research Scientist, GE Healthcare

Adjunct Assistant Professor,  Western University

268 Grosvenor street, E5-138, London, ON,  Canada
 
Emails: ismail.benayed@ge.com; ibenayed@uwo.ca

Phone (office): 1 (519) 646 6000  ext. 65425 

Research Interests


Short biography


Ismail Ben Ayed received the Ph.D. degree (with the highest honor) in the area of computer vision from the National Institute of Scientific Research (INRS-EMT), University of Quebec, Montreal, QC, Canada, in May 2007, under the guidance of Professor Amar Mitiche.  Since then, he has been a research scientist with GE Healthcare, London, ON, Canada, conducting research in medical image analysis. He also holds an Adjunct Assistant Professor appointment at Western University, department of Medical Biophysics. He co-authored a book, over 50 peer-reviewed papers in reputable journals and conferences, and six patents. He received a GE recognition award in 2012, a GE innovation award in 2010, an NSERC postdoctoral fellowship in 2009, and an NSERC Industrial Research and Development fellowship in 2007.  

Publications (selection)

 

Books  and invited book chapters



                                                                                                                                                        1) I. Ben Ayed, Distribution-Matching Approaches to Medical Image Segmentation, in  Computer Vision in Medical Imaging, 2013, pp. 19–33, C. H. Chen Editor, World Scientific. ©World Scientific



                                                                                                                                                        2) A. Mitiche and  I. Ben Ayed, Variational and Level Set Methods in Image Segmentation, 2011, Springer, 1st Edition (192 pages). ©Springer





Journal papers
 



                        

3) C. M. S. Nambakhsh, J. Yuan, K. Punithkumar, A. Goela, M. Rajchl, T. Peters and I. Ben Ayed, Left Ventricle Segmentation in MRI via Convex Relaxed Distribution  Matching, Medical Image Analysis, Vol.  17, No. 8, pp. 1010-1024, 2013.  ©Elsevier




                        

4) B. Miles, I. Ben Ayed, M. W. K. Law, G. Garvin, A. Fenster and S. Li, Spine Image Fusion via Graph CutsIEEE Transactions on Biomedical Engineering, Vol.  60, No. 7, pp. 1841-1850, 2013.  ©IEEE

        

                       

5) K. Punithakumar, I. Ben Ayed, A. Islam, A. Goela, I. G. Ross, J. Chong and S. Li, Regional Heart Motion Abnormality Detection: An Information Theoretic Approach, Medical Image Analysis, Vol.  17, No. 3, pp. 311-324, 2013.  ©Elsevier                                                                                                                                                        

    
                        
6) M. Ben Salah, I. Ben Ayed, and A. Mitiche, Active Curve Recovery of Region Boundary PatternsIEEE Transactions on Pattern Analysis and Machine Intelligence, Vol.  34, No. 5, pp. 834-849, 2012.  ©IEEE                                                     



                                                                                                                                                                                                                          
7) I. Ben Ayed, H-M Chen, K. Punithakumar, I. Ross, and S. Li, Max-flow Segmentation of the Left Ventricle by Recovering Subject-Specific Distributions via  a Bound of the Bhattacharyya Measure, Medical Image Analysis,  Vol. 16, No. 1 , pp. 87-100, 2012. ©Elsevier




                        
8) K. Punithakumar, J. Yuan, I. Ben Ayed, S. Li and Y. Boykov, A Convex Max-Flow Approach to Figure-Ground Separation, SIAM Journal of Imaging Sciences, Vol.  5, No. 4, pp. 1333-1354, 2012.  ©SIAM                                                                                               



                                                                                                                                                       9)  M. Ben Salah, A. Mitiche, and I. Ben Ayed, Multiregion Image Segmentation by Parametric Kernel Graph CutsIEEE Transactions on Image Processing,,  Vol. 20, No. 2 , pp. 545-557, 2011. ©IEEE  


10)  K. Punithakumar, I. Ben Ayed, I. Ross, A. Islam, J. Chong and S. Li, Detection of Left Ventricular Motion Abnormality via Information  Measures and Bayesian Filtering, IEEE Transactions on Information Technology in Biomedicine, Vol. 14, No. 4, pp. 1106-1113, 2010. ©IEEE                                                                                                                                                                                     

11) M. Ben Salah, A. Mitiche, and I. Ben Ayed, Effective Level Set Image Segmentation with a Kernel Induced Data TermIEEE Transactions on Image Processing, Vol.  19, No. 1, pp. 220-232, 2010. ©IEEE 




12)  K. Punithakumar, I. Ben Ayed, A. Islam, I. Ross and S. Li,  Tracking Endocardial Motion via Multiple Model FilteringIEEE Transactions on Biomedical Engineering, Vol. 57, No. 8, pp. 2001-2010, 2010.  ©IEEE   
                                                                                                                                                                                  
                                                                                                                                                    13) I. Ben Ayed, S. Li and I. Ross, Embedding Overlap Priors in Variational Left Ventricle TrackingIEEE Transactions on Medical Imaging, Vol. 28, No. 12, pp. 1902-1913, 2009. ©IEEE 



 14) I. Ben Ayed, S. Li and I. Ross, A Statistical Overlap Prior for Variational Image Segmentation, International Journal of Computer Vision, Vol. 85, No. 1, pp. 115-132, 2009.  ©Springer    
                                                                                                                                                                                    

15)  I. Ben Ayed, S. Li, I. Ross and A. Islam, Myocardium tracking via matching distributions, International Journal of Computer Assisted Radiology and Surgery, Vol. 4, No. 1, pp. 37-44, 2009.   ©Springer   
                                                                                                                                                                                  
                                                                                                                                                     16) I. Ben Ayed and A. Mitiche,  A Region Merging Prior for Variational Level Set Image Segmentation, IEEE Transactions on Image Processing, Vol.  17, No. 12, pp. 2301-2311, 2008.  ©IEEE 



17)  I. Ben Ayed, A. Mitiche, and Z. Belhadj, Polarimetric Image Segmentation via Maximum Likelihood Approximation and Efficient Multiphase Level sets,  IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. 28, No. 9, pp. 1493-1500, 2006. ©IEEE     
                                                                                                                                                                                
                                                                                                                                                        18) Ismail Ben Ayed, Nacera Hennane, and Amar Mitiche, Unsupervised Variational Image Segmentation/Classiļ¬cation using a Weibull Observation Model, IEEE Transactions on Image Processing, Vol. 15, No. 11, pp. 3431-3439, 2006.  ©IEEE


                                                                                                                                                       19) I. Ben Ayed, A. Mitiche, and Z. Belhadj, Multiregion Level Set Partitioning of Synthetic Aperture Radar Images, IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. 27, No. 5, pp. 793-800, 2005. ©IEEE 

Conference paper selection (full-paper peer reviewed)




20)  I. Ben Ayed, L. Gorelick and Y. Boykov, Auxiliary Cuts for General Classes of Higher-Order Functionals, CVPR 2013, Portland, Oregon. Slides for the CVPR talk.




21)  C. M.S. Nambakhsh, T. M. Peters, A. Islam and I. Ben Ayed, Right Ventricle Segmentation with Probability Product Kernel Constraints, MICCAI 2013, Nagoya, Japan. 



22)  I. Ben Ayed, K. Punithakumar, R. Minhas, R. Joshi and G. J. Garvin,   Vertebral Body Segmentation in MRI via Convex Relaxation and Distribution Matching, MICCAI 2012, Nice, France.



23)  K. Punithakumar, I. Ben Ayed, A. Islam, A. Goela and S. Li, Regional Heart Motion Abnormality Detection via Multiview Fusion, MICCAI 2012, Nice, France.




24) M. Afshin, I. Ben Ayed, A. Islam, A. Goela, T. M. Peters and S. Li, Global Assessment of Cardiac Function Using Image Statistics in MRI, MICCAI 2012, Nice, France.


25)  M. Afshin, I. Ben Ayed, K. Punithakumar, M. W. K. Law, A. Islam, A. Goela, I. G. Ross, T. M. Peters, and S. Li, Assessment of Regional Myocardial Function via Statistical Features in MR Images, Medical Image Computing and Computer-Assisted Intervention (MICCAI), Vol. LNCS 6893, pp. 107-114, Toronto, Canada, 2011.  ©Springer
                                                                                                                                                                                  

26)  I. Ben Ayed, K. Punithakumar, G. Garvin, W. Romano, and S. Li, Graph Cuts with Invariant Object-Interaction Priors: Application to Intervertebral Disc Segmentation,  Information Processing in Medical Imaging (IPMI), Vol.  LNCS 6801, pp. 171-183, Monastery Irsee, Germany, 2011. ©Springer




27)  M. S. Nambakhsh, J. Yuan, I. Ben Ayed, K. Punithakumar, A.  Islam, T. M.  Peters, and S. Li, A Convex Max-Flow Segmentation of LV using Subject-Specific Distributions on Cardiac MRIInformation Processing in Medical Imaging (IPMI), Vol. LNCS 6801, pp.221-232, Monastery Irsee, Germany, 2011. ©Springer


28) I. Ben Ayed, H-M Chen, K. Punithakumar, I. Ross, and S. Li, Graph Cut Segmentation with a Global Constraint: Recovering Region Distribution via a Bound of the Bhattacharyya Measure, IEEE International Conference on Computer Vision and Pattern Recognition (CVPR), San Francisco, CA, pp. 3288-3295, 2010.  ©IEEE 
                                                                                                                                                              
29) I. Ben Ayed, A. Mitiche, M. Ben Salah, and S. Li, Finding Image Distributions on Active Curves, IEEE International Conference on Computer Vision and Pattern Recognition (CVPR), San Francisco, CA, pp. 3225-3232, 2010.   ©IEEE 
 


 


30) K. Punithakumar, I. Ben Ayed, A. Islam, I. Ross and S. Li, Regional Heart Motion Abnormality Detection via Information Measures and Unscented Kalman Filtering Medical Image Computing and Computer Assisted Intervention (MICCAI), Beijing, China, T. Jiang et al. (Eds.), Vol. LNCS 6361, pp. 409-417, 2010.  ©Springer 

                                                                                                                             
31) M. Ben Salah, A. Mitiche, and I. Ben Ayed, Image Partitioning with Kernel Mapping and Graph Cuts, IEEE International Conference on Image Processing (ICIP), Hong Kong, pp. 245 – 248, 2010.  ©IEEE 



                                                                                                                          
32) I. Ben Ayed, K. Punithakumar, S. Li, A. Islam, and J. Chong, Left Ventricle Segmentation via Graph Cut Distribution Matching, Medical Image Computing and Computer Assisted Intervention (MICCAI), London, G.-Z. Yang et al. (Eds.), Vol.  LNCS 5762, pp. 901 - 909, 2009.  ©Springer


                                                                                                                                               
33) K. Punithakumar, S. Li, I. Ben Ayed, A. Islam, I. Ross and J. Chong, Heart Motion Abnormality Detection via an Information Measure and Bayesian Filtering, Medical Image Computing and Computer Assisted Intervention (MICCAI), London, UK, G.-Z. Yang et al. (Eds.), Vol. LNCS 5762, pp. 373 - 380, 2009. ©Springer
                                                                                                                                                                            
34) I. Ben Ayed, S. Li and I. Ross, Level Set Image Segmentation with a Statistical Overlap Constraint, Information Processing in Medical Imaging (IPMI), Williamsburg, VA, J. L. Prince et al. (Eds.), Vol. LNCS 5636, pp. 589 – 601, 2009.  ©Springer
                                          
                                                                
35)  K. Punithakumar, I. Ben Ayed, A. Islam, I. Ross and S. Li, Tracking Endocardial Boundary and Motion via Graph Cut Distribution Matching and Multiple Model Filtering, Asiatic Conference on Computer Vision (ACCV), Xi’an China, H. Zha et al. (Eds.),  Vol. LNCS 5996, pp. 172 - 182.  ©Springer

                                                                                                                                                        
36)  M. Ben Salah, A. Mitiche and I. Ben Ayed, Image Segmentation in a Kernel-Induced Space, IEEE International Conference on Image Processing (ICIP), Cairo, Egypt, pp. 2997-3000, 2009. ©IEEE

 
                                                                                                                                            
37) I. Ben Ayed, S. Li and I. Ross, Tracking Distributions with an Overlap Prior, IEEE International Conference on Computer Vision and Pattern Recognition (CVPR), Anchorage, AK,  pp. 1-7, 2008.  ©IEEE  


                                                                                                                                                     
38)  M. Ben Salah, A. Mitiche and I. Ben Ayed, A Continuous Labeling for Multiphase Graph Cut Image Partitioning, Advances in Visual Computing (ISVC), Las Vegas, NV, G. Bebis et al. (Eds.),  Vol.  LNCS 5358, pp. 268 – 277, 2008.  ©Springer


                                                                                                                                              
39)  I. Ben Ayed and A. Mitiche, Embedding a Region Merging Prior in Level Set Vector-Valued Image Segmentation, Asiatic Conference on Computer Vision (ACCV 2007), Tokyo, Japan, Y. Yagi et al. (Eds.), Springer, LNCS 4843: 925 – 934.  ©Springer



40) I. Ben Ayed and A. Mitiche, A Partition Constrained Minimization Scheme for Efficient Multiphase Level Set Image Segmentation, IEEE International Conference on Image Processing (ICIP 2006), Atlanta, GA, 1641 – 1644. ©IEEE

                                                                                                                                          
41) I. Ben Ayed, A. Mitiche and Z. Belhadj, Level Set Curve Evolution Partitioning of Polarimetric Images, IEEE International Conference on Image Processing (ICIP 2005), Genoa, Italy, 1281 – 1284. ©IEEE

                           

         
                                                                                                            

42) C. Vazquez, A. Mitiche and I. Ben Ayed, Image segmentation as regularized clustering: A fully global curve evolution method, IEEE International Conference on Image Processing (ICIP 2004), Singapore, 3464 – 3470. ©IEEE


Patents


1)   I. Ben Ayed, S. Li, I. Ross and R. Rankin, Systems and Methods for Tracking Images, U.S. Patent  8144930, issued in Mar. 2012 (filed in Dec. 2008)

2   P. Kumaradevan, I. Ben Ayed, S. Li, I. Ross, A. Islam and R. Rankin, Methods, Apparatus and Articles of Manufacture to Track Endocardial Motion, U.S. Patent Application Serial No. 12/636,470, filed in Dec.  2009

3)  P. Kumaradevan, I. Ben Ayed, S. Li, I. Ross, A. Islam and R. Rankin, Methods, Apparatus and Articles of Manufacture to Process Cardiac Images to Detect Heart Motion Abnormalities, U.S. Patent Application Serial No. 12/633,519, filed in Dec. 2009

4)  I. Ben Ayed, S. Gill, P. Kumaradevan and G. Garvin, Methods and Systems to Automatically Detect Vertebrae Boundaries in Spine Images, GE docket No 256635, filed on Oct. 10, 2011

5)  I. Ben, Ayed, D. Pavlov, P. Kumaradevan, S-P Hojjat and G. Garvin, A user-computer interaction protocol for failure-free spine image annotations, GE Docket No 265218, filed on Oct. 24, 2012

6)   I. Ben Ayed, P. Kumaradevan, S-P Hojjat and G. Garvin, A 3D hanging protocol for the visualization and assessment of the inter-vertebral disc displacements in spine imaging, GE Docket No 264518, filed on June 28, 2013

Codes


1) Multiphase level set image segmentation (download here):

This  package contains routines to perform level set image segmentation according to various formulations, including:

  • several multiphase (multi-region) statements, including a fast scheme where the computation load grows linearly with the number of regions; and

  • various region-based image descriptions which generalize the standard piecewise constant Chan-Vese model; the descriptions include Gamma distribution models for image data corrupted by multiplicative noise as in remote sensing synthetic aperture radar (SAR), and medical imaging ultrasound. Also included is kernel mapping as an alternative to explicit image modeling.


1) Kernel graph cut  image segmentation (download here):

This code implements multi-region graph cut image segmentation according to the kernel-mapping formulation in M. Ben Salah, A. Mitiche, and I. Ben Ayed, Multiregion Image Segmentation by Parametric Kernel Graph Cuts, IEEE Transactions on Image Processing, 20(2): 545-557 (2011).

Service


1)  Regular  reviewer for:

  • IEEE Transactions on Medical Imaging

  • IEEE Transactions on Image Processing

  • IEEE Transactions on Biomedical Engineering

  • Computer Vision and Image Understanding

  • Pattern Recognition

  • International Journal of Computer Assisted Radiology and Surgery


2)  Conference program committee member/reviewer for:


  • International conference on Computer Vision and Pattern Recognition (CVPR)

  • International Conference on Computer Vision (ICCV)

  • Medical Image Computing and Computer Assisted Intervention (MICCAI)

  • Energy Minimization Methods in Computer Vision and Pattern Recognition (EMMCVPR)