National University of Singapore | Department of Mathematics | Centre for Wavelets, Approx. and Info. Proc.


Publications:   Recent   Complete

 Upcoming
H. Ji, Y. Luo and Z. Shen, Digital Gabor filters do generate MRA-based wavelet tight frames, Applied and Computational Harmonic Analysis, xx(x), xx-xx, xxx. 2017

2017
G. Xu, Y. Quan and H. Ji, Estimating defocus blur through rank of local patches , 16th International Conference on Computer Vision, (ICCV), Venice, 2017
H. Ji, Z. Shen and Y. Zhao, Directional frames for image recovery: Multi-scale discrete Gabor frames, Journal of Fourier Analysis and Applications, 23(4), 729-757, Aug. 2017

2016
H. Ji, Y. Luo and Z. Shen, Image recovery via geometrically structured approximation, Applied and Computational Harmonic Analysis, 41(1), 75-93, Jul. 2016
W. Chen, H. Ji and Y. You, An augmented Lagrangian method for L1-regularized optimization problems with orthogonality constraints, SIAM Journal on Scientific Computing, 38(4), B570-B592, 2016
C. Bao, H. Ji, Y. Quan and Z. Shen, Dictionary learning for sparse coding: Algorithms and analysis, IEEE Transactions on Pattern Analysis and Machine Intelligence, 38(7), 1356-1369, Jul. 2016
Y. Quan, C. Bao and H. Ji, Equiangular kernel Dictionary learning with applications to dynamic texture analysis, IEEE Conference on Computer Vision and Pattern Recognition, (CVPR), Las Vegas, 2016
Y. Quan, Y. Xu, Y. Sun, Y. Huang and H. Ji, Sparse coding for classification via discrimination ensemble , IEEE Conference on Computer Vision and Pattern Recognition, (CVPR), Las Vegas, 2016
C. Wang, J. Kipping, C. Bao, H. Ji and A. Qiu, Cerebellar functional parcellation using sparse dictionary learning clustering, Frontiers in Neuroscience, 10(188), May. 2016
Z. Fan, H. Ji and Z. Shen, Dual Gramian analysis: duality principle and unitary extension principle, AMS Mathematics of Computation, 85, 239-270,  2016

2015
Y. Quan, Y. Huang and H. Ji, Dynamic texture recognition via orthogonal tensor dictionary learning, 15th International Conference on Computer Vision (ICCV), Chile, Dec. 2015
Y. Luo, Y. Xu and H. Ji, Removing rain from a single image via discriminative sparse coding, 15th International Conference on Computer Vision (ICCV), Chile, Dec. 2015
Y. Xu, Y. Quan, Z. Zhang, H. Ling and H. Ji, Classifying dynamic textures via spatiotemporal fractal analysis, Pattern Recognition, 48(10), 3239-3248, Oct. 2015
Y. Quan, H. Ji and Z. Shen, Data-driven multi-scale non-local wavelet frame construction and image recovery, Journal of Scientific Computing, 63(2), 307-329, May. 2015
C. Bao, H. Ji and Z. Shen, Convergence analysis for iterative data-driven tight frame construction scheme, Applied and Computational Harmonic Analysis, 38(3), 510-523, May. 2015

2014
C. Bao, Y. Quan and H. Ji, A convergent incoherent dictionary learning algorithm for sparse coding, European Conference on Computer Vision (ECCV), Zurich, 2014
J. Cai, H. Ji, Z. Shen and G. Ye, Data-driven tight frame construction and image denoising, Applied and Computational Harmonic Analysis, 37(1), 89-105, Jul. 2014
C. Bao, H. Ji, Y. Quan and Z. Shen, L0 norm based dictionary learning by proximal methods with global convergence , IEEE Conference on Computer Vision and Pattern Recognition (CVPR), Columbus, 2014
M. Li, Z. Fan, H. Ji and Z. Shen, Wavelet frame based algorithm for 3D reconstruction in electron microscopy, SIAM Journal on Scientific Computing, 36(1), B45-B69, Jan. 2014

2013
C. Bao, J. Cai and H. Ji, Fast sparsity-based orthogonal dictionary learning for image restoration, 14th International Conference on Computer Vision (ICCV), Sydney, 2013.
L. Hou, H. Ji and Z. Shen, Recovering over/under-exposed regions of a color photograph, SIAM Journal on Imaging Sciences, 6(4), 2213–2235, Nov. 2013
L. Hou and H. Ji, Band-limited wavelets and framelets in low dimensions, Journal of Fourier Analysis and Applications, 19(4), 731-761, Aug. 2013
H. Ji, X. Yang, H. Ling and Y. Xu, Wavelet domain multi-fractal analysis for static and dynamic texture classification, IEEE Transactions on Image Processing, 22(1), 286-299, Jan. 2013

2012
Y. Xu, S. Huang, H. Ji and C. Fermuller, Scale-space texture description on SIFT-like textons, Computer Vision and Image Understanding, 116(9), 999-1013, Sep. 2012
H. Ji and K. Wang, A two-stage approach to blind spatially-varying motion deblurring, IEEE Conference on Computer Vision and Pattern Recognition (CVPR), Rhode Island, 2012.
C. Bao, Y. Wu, H. Ling and H. Ji, Real time robust L1 tracker using accelerated proximal gradient approach, IEEE Conference on Computer Vision and Pattern Recognition (CVPR), Rhode Island, 2012.
Y. Xu, Y. Quan, Z. Zhang, H. Ji, M. Nishigaki, C. Fermuller and D. Dementhon, Contour based recognition, IEEE Conference on Computer Vision and Pattern Recognition (CVPR), Rhode Island, 2012.
H. Ji and K. Wang, Robust image deconvolution with an inaccurate blur kernel, IEEE Transactions on Image Processing, 21(4), 1624-1634, Apr. 2012
H. Ji, J. Li, Z. Shen, and K. Wang, Image deconvolution using a characterization of sharp images in wavelet domain, Applied and Computational Harmonic Analysis, 32(2), 295-304, Mar. 2012
B. Dong, H. Ji, J. Li, Z. Shen and Y.-H. Xu, Wavelet frame based blind image inpainting, Applied and Computational Harmonic Analysis, 32(2), 268-279, Mar. 2012
J. Cai, H. Ji, C. Liu and Z. Shen, Framelet based blind image deblurring from a single image, IEEE Transactions on Image Processing, 21(2), 562-572, Feb. 2012

2011
H. Ji, S. Huang, Z. Shen, and Y.-H. Xu, Robust video restoration by joint sparse and low rank matrix approximation, SIAM Journal on Imaging Sciences, 4(4), 1122-1142, Nov. 2011
H. Ji, Z. Shen and Y.-H. Xu, Wavelet frame based image restoration with missing/damaged pixels, East Asia Journal on Applied Mathematics, 1(2), 108-131, 2011
Y. Xu, Y. Quan, H. Lin and H. Ji, Dynamic texture classification using dynamic fractal analysis, 13th International Conference on Computer Vision (ICCV), Barcelona, 2011.

2010
J. Cai, H. Ji, F. Shang and Z. Shen, Inpainting for compressed images, Applied and Computational Harmonic Analysis, 29(3), 368-381, Nov. 2010
Y. Li, C. Fermuller, Y. Aloimonos and H. Ji, Learning shift-invariant sparse representation of actions, IEEE Conference on Computer Vision and Pattern Recognition (CVPR), San Francisco, 2010.
Y. Xu, X. Yang, H. Ling and H. Ji, A new texture descriptor using multifractal analysis in multi-orientation wavelet pyramid, IEEE Conference on Computer Vision and Pattern Recognition (CVPR), San Francisco, 2010.
H. Ji, C. Liu, Z. Shen and Y.-H. Xu, Robust video denoising using low rank matrix completion, IEEE Conference on Computer Vision and Pattern Recognition (CVPR), San Francisco, 2010.
H. Ji, Z. Shen and Y.-H. Xu, Wavelet frame based scene reconstruction from range data, Journal of Computational Physics, 229 (6), 2093-2018, Mar. 2010
C. Fermuller, H. Ji and A. Kitaoka, Illusory motion due to causal time filtering, Vision Research, 50 (3), 315-329, Feb. 2010

2009
J. Cai, H. Ji, C. Liu and Z. Shen, Blind motion deblurring using multiple images, Journal of Computational Physics, 228 (14), 5057-5071, Aug. 2009
Y. Xu, S. Huang, H. Ji and C. Fermuller, Combining powerful local and global statistics for texture description, IEEE Conference on Computer Vision and Pattern Recognition (CVPR), Miami, 2009
J. Cai, H. Ji, C. Liu and Z. Shen, Blind motion deblurring from a single image using sparse approximation, IEEE Conference on Computer Vision and Pattern Recognition (CVPR), Miami, 2009.
J. Cai, H. Ji, C. Liu and Z. Shen, High-quality curvelet-based motion deblurring using an image pair, IEEE Conference on Computer Vision and Pattern Recognition . (CVPR), Miami, 2009
Y. Xu, H. Ji and C. Fermuller, Viewpoint invariant texture description using fractal analysis, International Journal of Computer Vision, 83 (1), 85-100, Jun. 2009
B. Han and H. Ji, Compactly supported orthonormal complex wavelets with dilation four and symmetry, Applied and Computational Harmonic Analysis, 26, 422-431, May 2009
H. Ji and C. Fermuller, Robust wavelet-based super-resolution reconstruction: Theory and Algorithm, IEEE Trans. on Pattern Analysis and Machine Intelligence, 31(4), 649-660, Apr. 2009

2008 & before archived..