Alexander Wong

Research Interests

• Perceptual-based Video and Image Processing
  (compression, denoising, encryption, superresolution, ...)
• Medical Imaging
• Computer Vision
• Remote Sensing
• 3D Graphics and Game Development
• Multimedia Retrieval Systems
• Cognitive Radio Networks

Research Publications

Journal Publications



1. Alexander Wong, David Clausi, and Paul Fieguth, CPOL: Complex phase order likelihood as a similarity measure for MR-CT registration, Medical Image Analysis, vol. 14, no. 1, pp. 50-57, 2010. [Click here to view]
2. Alexander Wong, An Adaptive Monte Carlo Approach to Phase-Based Multimodal Image Registration, IEEE Transactions on Information Technology in Biomedicine, vol. 14, no. 1, pp. 173-179, 2010.
3. Alexander Wong, Akshaya Mishra, Kostadinka Bizheva, and David Clausi, General Bayesian estimation for speckle noise reduction in optical coherence tomography retinal imagery, accepted to Optics Express, 2010.
4. Akshaya Mishra, Alexander Wong, Kostadinka Bizheva, and David Clausi, Intra-retinal layer segmentation in optical coherence tomography images, selected for OSA Virtual Journal for Biomedical Optics, vol. 5, no. 1, 2010.
5. Akshaya Mishra, Alexander Wong, Kostadinka Bizheva, and David Clausi, Intra-retinal layer segmentation in optical coherence tomography images, selected for Optics Express, vol. 17, no. 26, pp. 23719-23728, 2010.
6. Akshaya Mishra, Alexander Wong, David Clausi, and Paul Fieguth, Quasi-Random Nonlinear Scale Space, accepted to Pattern Recognition Letters, 2010.
7. Alexander Wong, Akshaya Mishra, Justin Yates, David Clausi, Paul Fieguth, and Jack Callaghan, Intervertebral Disc Segmentation and Volumetric Reconstruction from Peripheral Quantitative Computed Tomography Imaging, IEEE Transactions on Biomedical Engineering, vol. 56, part 2, no. 11, 2748-2751, 2009. [Click here to view]
8. X. Wang, Alexander Wong, and P. Ho, Extended Knowledge-Based Reasoning Approach to Spectrum Sensing for Cognitive Radio, IEEE Transactions on Mobile Computing, vol. 9, no. 4, pp. 465-478, 2010. (Selected as the spotlight paper for April 2010 by IEEE Transactions on Mobile Computing)
9. Alexander Wong, Peter Yu, Wen Zhang, and David Clausi, Synthesis of SAR Sea-Ice Imagery using Region-based Local Conditional Posterior Sampling, accepted in IEEE Geosciences and Remote Sensing Letters, 2009.
10. L. da Silva, J. Scharcanski, Alexander Wong, and D. Koff, A Interactive Modeling and Evaluation of Tumor Growth, accepted in Journal of Digital Imaging, 2009.
11. Alexander Wong and David Clausi, AISIR: Automated Inter-sensor/Inter-band Satellite Image Registration using Robust Complex Wavelet Feature Representations, accepted in Pattern Recognition Letters, 2009.
12. Alexander Wong, Nadine Dunk, and Jack Callaghan, A Systematic Approach to Lumbar Spine Vertebrae Tracking in Fluoroscopic Images using Complex-Valued Wavelets, accepted in Computer Methods in Biomechanics and Biomedical Engineering, 2009.
13. Alexander Wong, Alignment of Confocal Scanning Laser Ophthalmoscopy Photoreceptor Images at Different Polarizations using Complex Phase Relationships, IEEE Transactions on Biomedical Engineering, Vol. 56, No. 7, pp. 1831-1837, 2009. [Click here to view]
14. Alexander Wong and Jacob Scharcanski, Phase-Adaptive Superresolution of Mammographic Images using Complex Wavelets, IEEE Transactions on Image Processing, Vol. 18, No. 5, pp. 1140-1146, 2009. [Click here to view]
15. Alexander Wong and Paul Fieguth, Fast Phase-based Registration of Multimodal Image Data, in Signal Processing, Vol. 89, pp. 724-737, 2009. [Click here to view]
16. Alexander Wong and Jeff Orchard, Efficient FFT-Accelerated Approach to Invariant Optical-LIDAR Registration, in IEEE Transactions on Geoscience and Remote Sensing, Vol. 46, No. 11, Part 2, pp. 3917-3925, 2008. [Click here to view]
17. X Wang, Alexander Wong, and P. Ho, DOSP: Dynamically Optimized Spatiotemporal Prioritization for Spectrum Sensing in Cooperative Cognitive Radio, accepted in ACM Wireless Networks, 2009.
18. Alexander Wong and Jeff Orchard, Robust Multimodal Registration using Local Phase Coherence Representations, in Journal of Signal Processing Systems: Special Issue on Biomedical Imaging (Springer), Vol. 54, No. 1, pp. 89-100, 2009. [Click here to view]
19. Alexander Wong, Adaptive Bilateral Filtering of Image Signals using Local Phase Characteristics, in Signal Processing, Vol. 88, No. 6, pp. 1615-1619, 2008. [Click here to view]
20. Alexander Wong and William Bishop, Efficient Least Squares Fusion of MRI and CT Images Using a Phase Congruency Model, in Pattern Recognition Letters, Vol. 29, No. 3, pp. 173-180, 2008. [Click here to view]
21. Alexander Wong and David Clausi, ARRSI: Automatic Registration of Remote Sensing Images, in IEEE Transactions on Geoscience and Remote Sensing, Vol. 45, No. 5, Part II, pp. 1483-1493, 2007. [Click here to view]
22. Alexander Wong, PECSI: a Practical Perceptually-Enhanced Compression Framework for Still Images, accepted in International Journal of Image and Graphics, 2009.
23. Alexander Wong, A Visual-Inertial Controller Approach to Improving Immersion in 3D Video Games, in Journal of CGSA, Vol. 1, No. 2, 2008. [Click here to view]
24. Alexander Wong and William Bishop, Practical Perceptually Adaptive Texture Map Compression for 3D Video Games, Journal of Game Development, Vol. 2, No. 4, pp. 5-23, 2007. [Click here to view]
25. Alexander Wong and William Bishop, Perceptually-Adaptive Image Super-resolution using Statistical Methods, in WSEAS Transactions on Signal Processing, vol. 3, pp. 44-49, January 2007. [Click here to view]




Conference Publications



26. Alexander Wong and Paul Fieguth, A new Bayesian source separation approach to blind decorrelation of SAR data, accepted to IEEE International Geoscience and Remote Sensing Syposium (IEEE IGARSS 2010), 2010.

27. Ying Liu, Alexander Wong, and Paul Fieguth, Remote sensing image synthesis, accepted to IEEE International Geoscience and Remote Sensing Syposium (IEEE IGARSS 2010), 2010.

28. Alexander Wong, David Clausi, and Paul Fieguth, Quasi-Random Scale Space Approach to Robust Keypoint Extraction in High-Noise Environments, accepted to Canadian Conference on Computer and Robot Vision (CRV), 2010.

29. Alexander Wong, Akshaya Mishra, David Clausi, and Paul Fieguth, Mammogram Image Superresolution Based on Statistical Moment Analysis, accepted to Canadian Conference on Computer and Robot Vision (CRV), 2010.

30. Akshaya Mishra, Alexander Wong, David Clausi, and Paul Fieguth, A Bayesian Information Flow Approach to Image Segmentation, accepted to Canadian Conference on Computer and Robot Vision (CRV), 2010.

31. X. Wang, Alexander Wong, and P. Ho, Dynamic Markov-Chain Monte Carlo channel negotiation for cognitive radio, accepted to IEEE INFOCOM 2010, 2010.

32. Alexander Wong, David Clausi, and Paul Fieguth, Adaptive Monte Carlo Retinex Method for Illumination and Reflectance Separation and Color Image Enhancement, accepted to Canadian Conference on Computer and Robot Vision (CRV), 2009.

33. Alexander Wong, David Clausi, and Paul Fieguth, SEC: Stochastic ensemble consensus approach to unsupervised SAR sea-ice segmentation, accepted to Canadian Conference on Computer and Robot Vision (CRV), 2009.

34. Alexander Wong, Wen Zhang, and David Clausi, IceSynth: An image synthesis system for sea-ice segmentation evaluation, accepted to Canadian Conference on Computer and Robot Vision (CRV), 2009.

35. Wen Zhang, Alexander Wong, and David Clausi, JEDI: Joint Enhancement and Despeckling of Images, accepted to Canadian Conference on Computer and Robot Vision (CRV), 2009.

36. X. Wang, Alexander Wong, and P. Ho, Prioritized Spectrum Sensing in Cognitive Radio Based on Spatiotemporal Statistical Fusion, accepted to IEEE Wireless Communications and Networking Conference (IEEE WCNC), 2009.

37. X. Wang, Alexander Wong, and P. Ho, Stochastic Channel Prioritization for Spectrum Sensing in Cooperative Cognitive Radio, in the proceedings of IEEE Consumer Communications and Networking Conference (IEEE CCNC), 2009.

38. Alexander Wong David Clausi, and Paul Fieguth, Phase-Adaptive Image Signal Fusion using Complex-valued Wavelets, in the proceedings of International Conference on Pattern Recognition (ICPR), 2008. [Click here to view]

39. Alexander Wong Akshaya Mishra, Paul Fieguth, and David Clausi, An Adaptive Monte Carlo Approach to Nonlinear Image Denoising, in the proceedings of International Conference on Pattern Recognition (ICPR), 2008. [Click here to view]

40. Alexander Wong, Simultaneous Multi-modal Registration of Multiple Images based on Multi-Dimensional Joint Phase Moment Distributions, in the proceedings of International Conference on Pattern Recognition (ICPR), 2008. [Click here to view]

41. Alexander Wong and David Clausi, Automatic Registration of Inter-band and Inter-sensor Images using Robust Complex Wavelet Feature Representations, in the proceedings of IAPR Workshop on Pattern Recognition in Remote Sensing (PRRS), 2008. [Click here to view]

42. Alexander Wong and William Bishop, Robust Edge Detection Based on Non-Local Contribution of Local Frequency Characteristics, in the proceedings of IEEE International Symposium on Multimedia (IEEE ISM), 2008. [Click here to view]

43. Alexander Wong and William Bishop, Deblocking of Block-Transform Compressed Images Using Phase-adaptive Shifted Thresholding, in the proceedings of IEEE International Symposium on Multimedia (IEEE ISM), 2008. [Click here to view]

44. Akshaya Mishra, Alexander Wong, David Clausi, and Paul Fieguth, Adaptive nonlinear image denoising and restoration using a cooperative Bayesian estimation approach, in the proceedings of The IEEE Indian Conference on Computer Vision, Graphics and Image Processing (IEEE ICVGIP), 2008. [Click here to view]

45. X. Wang, P. Ho, and Alexander Wong, Towards Efficient Spectrum Sensing for Cognitive Radio Through Knowledge-Based Reasoning, in the proceedings of IEEE International Symposium on Dynamic Spectrum Access Networks 2008 (IEEE DySPAN 2008), 2008.

46. Alexander Wong, Akshaya Mishra, Paul Fieguth, David Clausi, Nadine M. Dunk, Jack P. Callaghan, Shape-Guided Active Contour Based Segmentation and Tracking of Lumbar Vertebrae in Video Fluoroscopy Using Complex Wavelets, in the proceedings of Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE EMBC), 2008. [Click here to view]

47. Akshaya Mishra, Alexander Wong, Wen Zhang, Paul Fieguth, and David Clausi, Improved Interactive Medical Image Segmentation using Enhanced Intelligent Scissors (EIS), in the proceedings of Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE EMBC), 2008. [Click here to view]

48. Alexander Wong, Paul Fieguth, and David Clausi, A Perceptually-adaptive Approach to Image Denoising using Anisotropic Non-Local Means, in the proceedings of IEEE International Conference on Image Processing (ICIP), 2008. [Click here to view]

49. Alexander Wong and Jeff Orchard, An Adaptive Non-local Means Approach to Exemplar-based Inpainting, in the proceedings of IEEE International Conference on Image Processing (ICIP), 2008. [Click here to view]

50. Alexander Wong, Illumination Invariant Active Contour-based Segmentation using Complex-valued Wavelets, in the proceedings of IEEE International Conference on Image Processing (ICIP), 2008. [Click here to view]

51. Jeff Orchard, Mehran Ebrahimi, and Alexander Wong, Efficient Nonlocal-Means Denoising using the SVD, in the proceedings of IEEE International Conference on Image Processing (ICIP), 2008. [Click here to view]

52. Alexander Wong and William Bishop, Robust Hough-Based Symbol Recognition using Knowledge-based Hierarchical Neural Networks, in the proceedings of International Conference on Image Processing, Computer Vision, and Pattern Recognition, 2008. [Click here to view]
53. Alexander Wong and William Bishop, Efficient and Robust Approach to Simultaneous Non-rigid Image Registration and Gamma Estimation in the Frequency Domain, in the proceedings of International Conference on Image Processing, Computer Vision, and Pattern Recognition, 2008. [Click here to view]
54. Alexander Wong, An Iterative Approach to Improved Local Phase Coherence Estimation, in the proceedings of CRV 2008, May 2008. [Click here to view]
55. Alexander Wong and William Bishop, Perceptually-Adaptive Color Enhancement of Still Images for Dichromacy Deficiencies, in the proceedings of IEEE CCECE 2008: Symposium on Signal and Multimedia Processing, May 2008. [Click here to view]
56. Martin Hansen, William Bishop, Adam Bellemaire, and Alexander Wong, Decompressing Perceptually Adaptive Normal Map Compression (PANMC) Images in Hardware, in the proceedings of IEEE CCECE 2008: Symposium on Signal and Multimedia Processing, May 2008.
57. Alexander Wong and Andrew Kennings, Adaptive Multiple Texture Approach to Texture Packing for 3D Video Games, in the proceedings of ACM FuturePlay 2007, Toronto, Ontario, November 2007. [Click here to view]
58. Alexander Wong and William Bishop, Robust Invariant Descriptor for Symbol-Based Image Recognition and Retrieval, in the proceedings of the IEEE International Conference on Semantic Computing, Irvine, California, September 2007. [Click here to view]
59. Alexander Wong and William Bishop, Adaptive Large Scale Artifact Reduction in Edge-Based Image Super-Resolution, in the proceedings of the IASTED International Conference on Signal and Image Processing, Honolulu, Hawaii, August 2007. [Click here to view]
60. Alexander Wong and William Bishop, Backwards Compatible, Multi-Level Regions-of-Interest (ROI) Image Encryption Architecture with Biometric Authentication, in the proceedings of SIGMAP 2007: The International Conference on Signal Processing and Multimedia Applications, Barcelona, Spain, July 2007. [Click here to view]
61. Alexander Wong and William Bishop, Simultaneous Registration and Gamma Correction in the Frequency Domain, in the proceedings of the 2007 International Conference on Image Processing, Computer Vision, and Pattern Recognition, Las Vegas, Nevada, June 2007. [Click here to view]
62. Alexander Wong and William Bishop, Indirect Knowledge Based Approach to Non-Rigid Multi-Modal Registration of Medical Images, in the proceedings of IEEE Canadian Conference on Electrical and Computer Engineering, Vancouver, April 2007. [Click here to view]
63. Alexander Wong and William Bishop, Practical Perceptually Adaptive Approach to Video Logo Placement in TV Broadcasts, in the proceedings of IEEE Canadian Conference on Electrical and Computer Engineering, Vancouver, April 2007. [Click here to view]
64. Martin Hansen, Alexander Wong and William Bishop, A Hardware Implementation of Real-Time Video Deblocking Using Shifted Thresholding, in the proceedings of IEEE Canadian Conference on Electrical and Computer Engineering, Vancouver, April 2007. [Click here to view]
65. Alexander Wong and William Bishop, Intelligent Multi-Level Regions-of-Interest (ROI) Document Image Encryption using an Online Learning Model, in the proceedings of IASTED International Conference on Signal Processing, Pattern Recognition and Applications, Austria, February 2007. [Click here to view]
66. Alexander Wong and William Bishop, Adaptive Perceptual Degradation Based on Video Usage, in the proceedings of IEEE International Symposium on Multimedia, San Diego, December 2006. [Click here to view]
67. Alexander Wong and William Bishop, Practical Content-Adaptive Subsampling for Image and Video Compression, in the proceedings of IEEE International Symposium on Multimedia, San Diego, December 2006. [Click here to view]
68. Alexander Wong and William Bishop, Adaptive Normal Map Compression for 3D Video Games, in the proceedings of FuturePlay 2006, London, Ontario, Canada, October 2006. [Click here to view]
69. Alexander Wong and William Bishop, Efficient Deblocking of Block-Transform Compressed Images and Video Using Shifted Thresholding, in the proceedings of the IASTED International Conference on Signal and Image Processing, Honolulu, Hawaii, August 2006. [Click here to view]
70. Alexander Wong and William Bishop, An Efficient, Parallel Multi-Key Encryption of Compressed Video Streams, in the proceedings of the IASTED International Conference on Signal and Image Processing, Honolulu, Hawaii, August 2006. [Click here to view]
71. Alexander Wong and William Bishop, A Flexible Content-Based Approach to Adaptive Image Compression, in the proceedings of the IEEE International Conference on Multimedia & Expo, Toronto, Ontario, Canada, July 2006. [Click here to view]
72. Alexander Wong and William Bishop, Expert Knowledge Based Automatic Regions-of-Interest (ROI) Selection in Scanned Documents for Digital Image Encryption, in the proceedings of the 3rd Canadian Conference on Computer and Robot Vision, Quebec City, Quebec, Canada, June 2006. [Click here to view]
73. Alexander Wong, William Bishop and Jeff Orchard, Efficient Multi-Modal Least-Squares Alignment of Medical Images Using Quasi-Orientation Maps, in the proceedings of the 2006 International Conference on Image Processing, Computer Vision, and Pattern Recognition, Las Vegas, Nevada, June 2006. [Click here to view]
74. Alexander Wong and Jeff Orchard, Efficient and Robust Non-Rigid Least-Squares Rectification of Medical Images, in the proceedings of the 2006 International Conference on Image Processing, Computer Vision, and Pattern Recognition, Las Vegas, Nevada, June 2006. [Click here to view]
75. Asad Munshi, Alexander Wong, Andrew Clinton, Sherman Braganza, William Bishop, and Michael McCool, A Parameterizable SIMD Stream Processor in the proceedings of the 2005 IEEE Canadian Conference on Electrical and Computer Engineering, Saskatoon, Saskatchewan, Canada, May 2005. [Click here to view]