Multiresolution Techniques span an exceptionally broad range of algorithms, models, methods, and concepts. Central to the multiresolution approach is to somehow express short-range, mid-range, and long-range relationships explicitly. The main reasons for a multiresolution approach is one of:
- improving performance, by capturing long-range phenomena that would otherwise not be utilized
- reducing computational complexity, by allowing algorithms to work on both fine and coarse scales, rather than waiting for local pixel-level operations to converge at large scales
- improving numerical robustness (reducing problem conditioning), whereby a multiresolution transformation is essentially an algebraic pre-conditioner
- simplifying the algorithm, by making accessible long-range features that might, in some problems, be much easier to work with than pixel-level features
- improving intuition, by modeling or analyzing the problem over multiple scales, getting deeper insights into the phenomenon at hand.
Although there are, for sure, many mutiresolution approaches and algorithms which have been proposed, broadly these fall into a few groups:
Wavelet Methods
Problems in which a wavelet transform is used to decompose an image or video into multiple scales, very commonly for image/video denoising, or for feeding the coefficients at multiple scales into a classifier for image classification and segmentation.
Hierarchical Models
A model in which a pixellated, finest-scale random field is explicitly represented using a set of random fields over scales. In many cases the multi-scale model may be simpler, using principles of Markov decomposition to decouple the problem into pieces. A multi-scale model allows different models to be asserted at different scales, usually simpler or more meaningful than having a single-scale model which needs to assert all of the various sccale-dependent behaviours simultaneously.
Hierarchical Algorithms
Even if there is no explicitly hierarchical model, it is possible for the processing algorithm to be hierarchical. Best known examples include multigrid methods, whereby a single-scale linear system is solved by casting the problem onto a hierarchy, and wavelet methods in image processing, whereby the image is transferred into a set of multiscale coefficients in the wavelet domain, in which certain operations (like image compression or image denoising) are relatively simple.
Related people
Directors
Alexander Wong, David A. Clausi, Paul Fieguth
Students
Fan Li, Keyvan Kasiri, Ahmed Gawish, Kirsten Robinson, Lei Wang, Ameneh Boroomand, Jiange Grace Liu, Bi Hongbo
Alumni
Amir H. Shabani, Fakhry Khellah, Fu Jin, Gabriel Carballo, Qiyao Yu, Simon Alexander, Slawo Wesolkowski, Wesley Campaigne, Ying Liu, Zohreh Azimifar, Shiva Zaboli, Aanchal Jain, Dorothy Lui
Related demos
Action Recognition in Video
Porous Media
Satellite SAR Sea Ice Classification
Related publications
Journal articles
Campaigne, W., and P. Fieguth, "Frozen State Hierarchical Annealing", IEEE Transactions on Image Processing, vol. 22, no. 4, pp. 1486-1497, 2013. Details
Zhang, W., A. Wong, A. Mishra, P. Fieguth, and D. A. Clausi, "Efficient globally optimal registration of remote sensing imagery via quasi-random scale-space structural correlation energy functional", IEEE Geoscience and Remote Sensing Letters, vol. 8, issue 5, pp. 997-1001, 2011. Details
Liu, Y., A. Wong, and P. Fieguth, "Synthesis of remote sensing label fields using a tree-structured hierarchical model",IEEE Transactions on Geoscience and Remote Sensing, vol. 49, no. 6, pp. 2060-2070, 2011. Details
Azimifar, Z., M. Amiri, P. Fieguth, and E. Jernigan, "Empirical study of wavelet domain image joint statistics and proposition of an efficient correlation map", Journal of Mathematical Imaging and Vision, pp. 1-15, 2011. Details
Mishra, A., A. Wong, D. A. Clausi, and P. Fieguth, "Quasi-random nonlinear scale space", Pattern Recognition Letters, vol. 31, issue 13, pp. 1850 - 1859, 2010. Details
Ioannidis, M. A., S. K. Alexander, P. Fieguth, and E. Vrscay, "Hierarchical annealing for synthesis of binary images",Mathematical Geosciences, vol. 41: Springer Berlin / Heidelberg, pp. 357-378, 2009. Details
Jin, F., P. Fieguth, and L. Winger, "Wavelet video denoising with regularized multiresolution motion estimation",EURASIP Journal on Advances in Signal Processing, New York, NY, United States, Hindawi Publishing Corp., pp. 109, 2006. Details
Khellah, F. M., P. Fieguth, M. J. Murray, and M. R. Allen, "Statistical processing of large image sequences", IEEE Transactions on Image Processing, vol. 14, no. 1, pp. 80 - 93, 2005. Details
Ho, T. T., P. Fieguth, and A. S. Willsky, "Computationally efficient steady-state multiscale estimation for 1-D diffusion processes", Automatica, vol. 37, pp. 325–340, 2001. Details
Fieguth, P., "Multiply-rooted multiscale models for large-scale estimation", IEEE Transactions on Image Processing, vol. 10, pp. 1676 - 1686, 2001. Details
Schneider, M., P. Fieguth, W. C. Karl, and A. S. Willsky, "Multiscale statistical methods for the segmentation of signals and images", IEEE Transactions on Image Processing, vol. 9, no. 3, pp. 456 - 468, 2000. Details
Fieguth, P., W. C. Karl, and A. S. Willsky, "Efficient multiresolution counterparts to variational methods for surface reconstruction", Computer Vision & Image Understanding, vol. 70, no. 2: Elsevier Science Inc., pp. 157 - 176, 1998. Details
Fieguth, P., D. Menemenlis, and C. Wunsch, "Mapping Mediterranean altimeter data with a multiresolution optimal interpolation algorithm", Journal of Atmospheric and Oceanic Technology, no. 15, pp. 535-546, 1998. Details
Irving, W. W., P. Fieguth, and A. S. Willsky, "An overlapping tree approach to multiscale stochastic modeling and estimation", IEEE Transactions on Image Processing, vol. 6, no. 11, pp. 1517 - 1529, 1997. Details
Wunsch, C., D. Menemenlis, P. Fieguth, and A. S. Willsky, "Adaptation of a fast optimal interpolation algorithm to the mapping of oceanographic data", Journal of Geophysical Research, vol. 102, issue C5: AGU, pp. 10573 - 10584, 1997. Details
Fieguth, P., and A. S. Willsky, "Fractal estimation using models on multiscale trees", IEEE Transactions on Signal Processing, vol. 44, no. 5, pp. 1297 - 1300, 1996. Details
Fieguth, P., W. C. Karl, A. S. Willsky, and C. Wunsch, "Multiresolution optimal interpolation and statistical analysis of Topex/Poseidon satellite altimetry", IEEE Transactions on Geoscience and Remote Sensing, vol. 33, no. 2, pp. 280 - 292, 1995. Details
Conference papers
Li, E., M. J. Shafiee, F. Kazemzadeh, and A. Wong, "Sparse Reconstruction of Compressed Sensing Multi-spectral Data using Cross-Spectral Multi-layered Conditional Random Field Model", SPIE optics and photonics 2015, San Diego, SPIE , May, Accepted. Details
Liu, L., P. Fieguth, M. Pietikäinen, and S. Lao, "Median Robust Extended Local Binary Pattern for Texture Classification", IEEE International Conference on Image Processing, Accepted. Details
Kasiri, K., P. Fieguth, and D. A. Clausi, "Cross modality label fusion in multi-atlas segmentation", IEEE International Conference on Image Processing, 2014. Details
Barshan, E., C. Scharfenberger, M. Lamm, and P. Fieguth, "Resolution Enhancement Based on Shifted Superposition",Society for Information Display's Week 2015, June, 2015. Details
Gawish, A., and P. Fieguth, "External forces for active contours using the undecimated wavelet transform", accepted, IEEE International Conference on Image Processing, Québec city, Québec, Canada, 2015. Details
Boroomand, A., B. Tan, A. Wong, and K. Bizheva, "Axial resolution improvement in spectral domain optical coherence tomography using a depth-adaptive maximum-a-posterior framework", SPIE Photonics West (BiOS), San Francisco, USA, 2015. Details
Boroomand, A., M. J. Shafiee, A. Wong, and K. Bizheva, "Lateral resolution enhancement via imbricated spectral domain optical coherence tomography in a maximum-a-posterior reconstruction framework", SPIE Photonics West (BiOS), San Francisco, USA, 2015. Details
Gawish, A., P. Fieguth, S. Marschall, and K. Bizheva, "Undecimated Hierarchical Active Contours for OCT Image Segmentation", IEEE International Conference on Image Processing ICIP, 2014. Details
Kasiri, K., D. A. Clausi, and P. Fieguth, "Multi-modal image registration using structural features", 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC'14), 2014. Details
Carter, K., S. Marschall, A. Gawish, P. Fieguth, L. Sorbara, and K. Bizheva, "Accuracy evaluation of scleral lens thickness and radius of curvature using high-resolution SD- and SS-OCT", SPIE Photonics West, 2014. Details
Wong, A., A. K. Scott, E. Li, and R. Amelard, "Continuous sea ice thickness estimation using a joint MODIS and AMSR-E guided variational model", IEEE International Geoscience and Remote Sensing Symposium, March, 2013 Details
Shabani, A. H., J. S. Zelek, and D. A. Clausi, "Evaluation of local spatio-temporal salient feature detectors for human action recognition", IEEE Canadian Conference on Computer and Robot Vision, May. Details
Wong, A., "Perceptual Structure Distortion Ratio: An image quality metric based on complex phase order", 9th Canadian Conference on Computer and Robot Vision, 2012. Details
Kumar, A., A. Wong, D. A. Clausi, and P. Fieguth, "Multi-scale tensor vector field active contour", IEEE Conference on Image Processing, 2012. Details
Shafiee, M. J., A. Wong, and Z. Azimifar, "A Novel Hierarchical Model-Based Frame Rate Up-Conversion via Spatio-temporal Conditional Random Fields", IEEE International Symposium of Multimedia , 2012. Details
Shabani, A. H., D. A. Clausi, and J. S. Zelek, "Improved Spatio-temporal Salient Feature Detection for Action Recognition", British Machine Vision Conference, University of Dundee, Dundee, UK, August, 2011. Details
Wong, A., A. Mishra, D. A. Clausi, and P. Fieguth, "Quasi-random scale space approach to robust keypoint extraction in high-noise environments", 7th Canadian Conference on Computer and Robot Vision, Ottawa, Ontario, Canada, March, 2010. Details
Shabani, A. H., J. S. Zelek, and D. A. Clausi, "Human action recognition using salient opponent-based motion features",7th Canadian Conference on Computer and Robotic Vision, Ottawa, Ontario, Canada, pp. 362 - 369, March, 2010. Details
Gangeh, M. J., A. H. Shabani, and M. Kamel, "Nonlinear scale-space theory in texture classification using multiple classifier systems", International Conference on Image Analysis and Recognition, June, 2010. Details
Shabani, A. H., J. S. Zelek, and D. A. Clausi, "Robust Local Video Event Detection for Action Recognition", Advances in Neural Information Processing Systems (NIPS), Machine Learning for Assistive Technology Workshop, Whistler, Canada, December, 2010. Details
Liu, Y., A. Wong, and P. Fieguth, "Remote sensing image synthesis", 2010 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), pp. 2467 -2470, 2010. Details
Shabani, A. H., D. A. Clausi, and J. S. Zelek, "Towards a robust spatio-temporal interest point detection for human action recognition", IEEE Canadian Conference on Computer and Robot Vision, Kelowna, BC, Canada, Kelowna, British Columbia, Canada, pp. 237-243, February, 2009. Details
Mishra, A., P. Fieguth, and D. A. Clausi, "A robust modular wavelet network based symbol classifier", 6th International Conference on Image Analysis and Recognition (ICIAR), Halifax, Nova Scotia, Canada, July 6 - 9, 2009. Details
Mohebi, A., Y. Liu, and P. Fieguth, "Hierarchical sampling with constraints", 6th International Conference on Image Analysis and Recognition, pp. 23 - 32, 2009. Details
Liu, Y., and P. Fieguth, "Image resolution enhancement with hierarchical hidden fields", 6th International Conference on Image Analysis and Recognition, pp. 73 - 82, 2009. Details
Liu, Y., and P. Fieguth, "Parallel hidden hierarchical fields for multi-scale reconstruction", 7th International Conference on Energy Minimization Methods in Computer Vision and Pattern Recognition, pp. 70–83, 2009. Details
Wong, A., D. A. Clausi, and P. Fieguth, "Phase-adaptive image signal fusion using complex-valued wavelets", 19th International Conference on Pattern Recognition, Tampa, Florida, USA, Dec. 8 - 11, 2008. Details
Wong, A., D. A. Clausi, and P. Fieguth, "Automatic registration of inter-band and inter-sensor images using robust complex wavelet feature representations", 5th Workshop on Pattern Recognition for Remote Sensing, Tampa, Florida, USA, Dec. 7, 2008. Details
Amiri, M., Z. Azimifar, and P. Fieguth, "Correlated non-linear wavelet shrinkage", 15th IEEE International Conference on Image Processing, 2008, pp. 2348 - 2351, 2008. Details
Yu, Q., and D. A. Clausi, "Joint image segmentation and interpretation using iterative semantic region growing on SAR sea ice imagery", 18th International Conference on Pattern Recognition (ICPR), vol. 2, Hong Kong, pp. 223 - 226, Aug. 21 - 24, 2006. Details
Kachouie, N. Nezamoddin, and P. Fieguth, "A combined Bayesshrink wavelet-ridgelet technique for image denoising",2006 IEEE International Conference on Multimedia and Expo, pp. 1917 - 1920, 2006. Details
Wesolkowski, S., and P. Fieguth, "Hierarchical region mean-based image segmentation", 3rd Canadian Conference on Computer and Robot Vision: IEEE Computer Society, pp. 30, 2006. Details
Jin, F., P. Fieguth, and L. Winger, "Image denoising using complex wavelets and Markov prior models", 12th IEEE International Conference on Image Processing: Springer, 2005. Details
Alexander, S. K., P. Fieguth, and E. Vrscay, "Discrete-state modeling of porous media over multiple scales", SIAM Conference on Mathematical and Computational Issues in the Geosciences, Avignon, 2005. Details
Alexander, S. K., P. Fieguth, and E. Vrscay, "Hierarchical annealing of porous media", SIAM Conference on Mathematical and Computational Issues in the Geosciences, Avignon, 2005. Details
Kachouie, N. Nezamoddin, and P. Fieguth, "BayesShrink ridgelets for image denoising", 2004 International Conference on Image Analysis and Recognition, 2004. Details
Fieguth, P., "Hierarchical MCMC sampling", 2004 International Conference on Image Analysis and Recognition, 2004. Details
Wesolkowski, S., and P. Fieguth, "Hierarchical regions for image segmentation", 2004 International Conference on Image Analysis and Recognition, Portugal, 2004. Details
Jin, F., P. Fieguth, and L. Winger, "Motion-compensated wavelet video denoising", 2004 International Conference on Image Analysis and Recognition, Portugal, 2004. Details
Fieguth, P., and S. K. Alexander, "Parameterized hierarchical annealing for scientific models", 2004 International Conference on Image Analysis and Recognition, Portugal, 2004. Details
Azimifar, Z., P. Fieguth, and E. Jernigan, "Textures and wavelet-domain joint statistics", 2004 International Conference on Image Analysis and Recognition, Portugal, 2004. Details
Alexander, S. K., P. Fieguth, and E. Vrscay, "Hierarchical annealing for scientific models", 37th IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Montreal, 2004. Details
Azimifar, Z., P. Fieguth, and E. Jernigan, "Hierarchical Markov models for wavelet-domain statistics", 2003 IEEE Workshop on Statistical Signal Processing, 2003. Details
Fieguth, P., "Hierarchical posterior sampling for Gauss-Markov random fields", 2003 International Conference on Image Processing, vol. 1, 2003. Details
Jin, F., P. Fieguth, L. Winger, and E. Jernigan, "Image enhancement by frequency extrapolation using a multiscale edge representation", CCECE '03, Montreal, 2003. Details
Alexander, S. K., P. Fieguth, and E. Vrscay, "Hierarchical annealing for random image synthesis", Fourth International Workshop on Energy Minimization Methods in Computer Vision and Pattern Recognition (EMMCVPR 2003), Portugal, 2003. Details
Fieguth, P., "Hierarchical posterior sampling for images and random fields", ICIP '03, vol. 1, Spain, 2003. Details
Azimifar, Z., P. Fieguth, and E. Jernigan, "Towards random field modeling of wavelet statistics", International Conference on Image Processing, Rochester, NY, 2002. Details
Azimifar, Z., P. Fieguth, and E. Jernigan, "Hierarchical multiscale modeling of wavelet-based correlations",Structural, Syntactic, and Statistical Pattern Recognition, Joint IAPR International Workshops, pp. 850–860, 2002. Details
Azimifar, Z., P. Fieguth, and E. Jernigan, "Modeling the correlation structure of images in the wavelet domain", 14th Canadian Conference on Electrical and Computer Engineering , vol. 2, Toronto, pp. 1123 - 1127, 2001. Details
Azimifar, Z., P. Fieguth, and E. Jernigan, "Wavelet shrinkage with correlated wavelet coefficients", International Conference on Image Processing, vol. 3, Greece, 2001. Details
Carballo, G. F., and P. Fieguth, "Multiresolution Network Flow Phase Unwrapping", IEEE 2000 International Geoscience and Remote Sensing Symposium, vol. 2, pp. 755 -757, 2000. Details
Fieguth, P., F. M. Khellah, M. J. Murray, and M. R. Allen, "Data fusion of sea-surface temperature data", IEEE Geoscience and Remote Sensing Society, vol. 5, pp. 2111 - 2113, 2000. Details
Fieguth, P., "Foveated multiscale models for large-scale estimation", International Conference on Image Processing, 1999. Details
Ho, T. T., P. Fieguth, and A. S. Willski, "Recursive multiscale estimation of space-time random fields", International Conference on Image Processing, vol. 2, 1999. Details
Fieguth, P., M. R. Allen, and M. J. Murray, "Hierarchical methods for global-scale estimation problems", IEEE Canadian Conference on Electrical and Computer Engineering, vol. 1, Waterloo, Canada, pp. 161 - 164, 1998. Details
Fieguth, P., "Global-Scale Three-Dimensional Statistical Estimation", IEEE MDSP '98, Alpbach, Austria, pp. 247 - 250, 1998. Details
Ho, T. T., P. Fieguth, and A. S. Willsky, "Computationally efficient multiscale estimation of large-scale dynamic systems", International Conference on Image Processing, pp. 274 - 278, 1998. Details
Fieguth, P., "Multipole-motivated reduced-state estimation", International Conference on Image Processing, vol. 1, Chicago, 1998. Details
Willsky, A. S., T. T. Ho, and P. Fieguth, "Multiscale modeling with temporal dynamics", 21st International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Atlanta, GA, pp. 3098 - 3101, 1996. Details
Ho, T. T., P. Fieguth, D. Menemenlis, and A. S. Willsky, "TOPEX/POSEIDON and ERS Altimeter Mapping via Efficient Multiresolution Optimal Interpolation", AGU Fall Meeting 1996, San Francisco, 1996. Details
Schneider, M., P. Fieguth, W. C. Karl, and A. S. Willsky, "Multiscale Methods for the Segmentation of Images",ICASSP '96, vol. 4, pp. 2247 - 2250, 1996. Details
Karl, W. C., M. Schneider, W. W. Irving, P. Fieguth, M. M. Daniel, H. Krim, C. H. Fosgate, and A. S. Willsky,"Multiresolution stochastic models: methodology and applications in remote sensing, image processing, and radar",IEEE MDSP '96, pp. 88 - 89, 1996. Details
Fieguth, P., A. S. Willsky, D. Menemenlis, and C. Wunsch, "A general multiresolution approach to the estimation of dense fields in remote sensing", International Conference on Image Processing, vol. 1, Lausanne, Switzerland, pp. 609 - 612, 1996. Details
Fieguth, P., W. C. Karl, and A. S. Willsky, "Multiresolution statistical analysis and assimilation of large ocean data sets",20th IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol. 5, pp. 2781 -2784 vol.5, 1995. Details
Fieguth, P., and A. S. Willsky, "Multiresolution models for fractals and their uses in statistical signal and image processing", IEEE Conference on Nonlinear Signal and Image Processing, Greece, pp. 779 - 782, 1995. Details
Fieguth, P., W. W. Irving, and A. S. Willsky, "Multiresolution model development for overlapping trees via canonical correlation analysis", International Conference on Image Processing, vol. 1, pp. 45 - 48, 1995. Details
Fieguth, P., A. S. Willsky, and W. C. Karl, "Multiresolution stochastic imaging of satellite oceanographic altimetric data",Image Processing, 1994. Proceedings. ICIP-94., IEEE International Conference, vol. 2, pp. 1 -5 vol.2, nov, 1994. Details
Fieguth, P., W. C. Karl, and A. S. Willsky, "Multiresolution stochastic processing of Topex/Poseidon oceanographic altimetry", IEEE OCEANS'94, vol. 1, pp. 851 - 855, 1994. Details
Willsky, A. S., P. Fieguth, and W. C. Karl, "A Statistical Multiscale Approach To Mapping Altimetric Data", Neural and Stochastic Methods in Image and Signal Processing III, vol. 2304, no. 1: SPIE, pp. 94 - 104, 1994. Details
Irving, W. W., A. S. Willsky, M. M. Daniel, W. C. Karl, and P. Fieguth, "Efficient Algorithms for Gauss-Markov Random Fields", Eighth IEEE Multi-Dimensional Signal Processing Workshop, pp. 160 - 161, 1993. Details
Book chapters
Fieguth, P, W. Campaigne, and S. K. Alexander, "Frozen-State Hierarchical Annealing", Image Analysis and Recognition, vol. 4141: Springer Berlin / Heidelberg, pp. 41-52, 2006. Details
Fieguth, P., Handbook of Image and Video Processing (2nd Ed.), : Academic Press, pp. 361-276, 2004. Details
Fieguth, P, Handbook of Image and Video Processing, : Academic Press, 1999. Details
Books
Fieguth, P., "Statistical Image Processing and Multidimensional Modeling", Information Science and Statistics: Springer, 2010. Details
Theses
Campaigne, W., "Frozen-State Hierarchical Annealing", Department of Systems Design Engineering, 2012. Details
Clausi, D. A., "Texture Segmentation of SAR Sea Ice Imagery", Department of Systems Design Engineering, Waterloo, Ontario, Canada, University of Waterloo, pp. 176, 1996. Details
Fieguth, P., "Application of Multiscale Estimation to Large Multidimensional Imaging and Remote Sensing Problems",Department of Electrical Engineering and Computer Science, Cambridge, Massachusetts, Massachusetts Institute of Technology, 1995. Details