Namrata Vaswani's Publications

Preprints

Journal Papers

Conference Papers

Research Summary
Newer work: Real-time (Recursive) Robust PCA
Talk on Recursive Sparse Recovery (invited talk at Brown Univ, Feb 2011, talks at JHU, UMD)

Recent Preprints and Conference Papers (with no journal papers yet!)

· Recursive Robust PCA

o Chenlu Qiu and Namrata Vaswani, Recursive Sparse Recovery in Large but Low Dimensional Noise, 48th Allerton Conference on Communication Control  and Computing, 2011.

o Chenlu Qiu and Namrata Vaswani, Support Predicted Modified-CS for Recursive Robust Principal Components' Pursuit, IEEE Intl. Symp. Info. Theory (ISIT) 2011

o Chenlu Qiu and Namrata Vaswani, Real-time Robust Principal Components' Pursuit, 48th Allerton Conference on Communication Control  and Computing, 2010 (Allerton talk)(talk2)

· Recursive Recovery of Sparse Signal Sequences

o Namrata Vaswani, Stability (over time) of Modified-CS for Recursive Causal Sparse Reconstruction, Allerton 2010. Talk Long version on ArXiv

o Fardad Raisali and Namrata Vaswani, Stability (over time) of Regularized Modified-CS (noisy) for Recursive Causal Sparse Reconstruction, CISS 2011

o Samarjit Das and Namrata Vaswani, “Particle Filtered Modified Compressive Sensing (PaFiMoCS) for tracking signal sequences,” Asilomar 2010 (invited). Talk

o Namrata Vaswani, KF-CS-residual (KF-CS): Compressive Sensing on Kalman filtered residual, arXiv:0912.1628. Shorter version in ICIP'08 and ICASSP 2009 (ICIP talk)

Journal Papers

1. Wei Lu and Namrata Vaswani, “Exact Reconstruction Conditions for Regularized Modified Basis Pursuit”, to appear, IEEE Trans. Signal Processing, 2012
2. Wei Lu and Namrata Vaswani, “Regularized Modified BPDN for Noisy Sparse Reconstruction with Partial Erroneous Support and Signal Value Knowledge”, to appear, IEEE Trans. Signal Processing, 2012
3. Samarjit Das and Namrata Vaswani, “Particle Filter with Mode Tracker (PF-MT) for Visual Tracking across Illumination Changes”, to appear, IEEE Trans. Image Processing, 2012
4. Namrata Vaswani, "LS-CS-residual (LS-CS): Compressive Sensing on the Least Squares Residual", IEEE Trans. Signal Processing, August 2010.
5. Namrata Vaswani and Wei Lu,  Modified-CS: Modifying Compressive Sensing for Problems with Partially Known Support,   IEEE Trans. Signal Processing, September 2010.
6. Samarjit Das and Namrata Vaswani, Nonstationary Shape Activities: Dynamic Models for Landmark Shape Change and Applications, IEEE Trans. Pattern Analysis and Machine Intelligence (PAMI), To Appear, 2010.
7. Namrata Vaswani, Yogesh Rathi, Anthony Yezzi, Allen Tannenbaum, Deform PF-MT: Particle Filter with Mode Tracker for Tracking Non-Affine Contour Deformations,  IEEE Trans. Image Processing, To Appear, 2010.
8. Namrata Vaswani, Particle Filtering for Large Dimensional State Spaces with Multimodal Observation Likelihoods, IEEE Trans. Signal Processing, pp.4583-4597, Oct. 2008.
9. Yogesh Rathi, Namrata Vaswani, Allen Tannenbaum, Anthony Yezzi, Tracking Deforming Objects using Particle Filtering for Geometric Active Contours, IEEE Trans. on Pattern Analysis and Machine Intelligence (PAMI), pp. 1470-1475, August 2007.
10. Yogesh Rathi, Namrata Vaswani, Allen Tannenbaum, A Generic Framework for Tracking using Particle Filter with Dynamic Shape Prior, IEEE Trans. Image Processing, pp.1370-1382, May 2007
11. Namrata Vaswani, Additive Change Detection in Nonlinear Systems with Unknown Change Parameters,  IEEE Trans. Signal Processing, pp. 859-872, March 2007.
12. Namrata Vaswani, Rama Chellappa, Principal Component Null Space Analysis for Image and Video Classification,  IEEE Trans. Image Processing, pp. 1816-1830, July 2006.
13. Namrata Vaswani, Amit Roy-Chowdhury, Rama Chellappa, "Shape Activity": A Continuous State HMM for Moving/Deforming Shapes with Application to Abnormal Activity Detection, IEEE Trans. Image Processing, pp 1603-1616, October 2005
14. A. Ramamoorthy, Namrata Vaswani,  S. Chaudhury and S. Bannerjee, Recognition of Dynamic Hand Gestures , Pattern Recognition, Vol. 36, No. 9, pp. 2069-2081, September, 2003
15. Bookchapter: Namrata Vaswani, A.K. Agrawal, Q. Zheng, R. Chellappa, Moving Object Detection and Compression in IR Sequences,  bookchapter in Computer Vision beyond the Visible Spectrum, Eds B. Bhanu and I. Pavlidis, Springer, 2003

Low Acceptance Rate (< 25%) Conference Papers

1. Bi Song, Namrata Vaswani, Amit Roy-Chowdhury, Closed-loop Tracking and Change Detection in Multi-Activity Sequences,  IEEE Intl. Conf. on Computer Vision and Pattern Recognition (CVPR), 2007. (Acceptance rate: 25%)
2. Yogesh Rathi, Namrata Vaswani , Allen Tannenbaum, Anthony Yezzi, "Particle Filtering for Geometric Active Contours and Application to Tracking Deforming Objects", IEEE Intl. Conference on Computer Vision and Pattern Recognition (CVPR), 2005, oral. (Acceptance rate: 6%)
3. Namrata Vaswani, Bound on Errors in Particle Filtering with Incorrect Model Assumptions and  its Implication for Change Detection, IEEE Intl. Conference on Acoustics, Speech and Signal Processing  (ICASSP), 2004.  Selected among top 15% papers in Signal Processing Theory and Methods category, and received an invitation to submit to IEEE Signal Processing Society journals. (Acceptance rate: 15%*50% = 7.5%)
4. Namrata Vaswani, A. RoyChowdhury, Rama Chellappa, "Activity Recognition Using the Dynamics of the Configuration of Interacting Objects",  IEEE Computer Vision and Pattern Recognition (CVPR), 2003. (Acceptance rate: 25%)

All Conference Papers (reverse chronological order)

• Chenlu Qiu and Namrata Vaswani, Support Predicted Modified-CS for Recursive Robust Principal Components' Pursuit, IEEE Intl. Symp. Info. Theory (ISIT) 2011
• Wei Lu, Taoran Li, Ian Atkinson,  Namrata Vaswani,  Modified-CS-Residual for Recursive Reconstruction of Highly Undersampled Functional MRI Sequences, IEEE Intl. Conf. Image Proc. (ICIP) 2011
• Fardad Raisali and Namrata Vaswani, Stability (over time) of Regularized Modified-CS (noisy) for Recursive Causal Sparse Reconstruction, CISS 2011
• Chenlu Qiu and Namrata Vaswani, Real-time Robust Principal Components' Pursuit, Allerton, 2010
  
  
• Namrata Vaswani, Stability (over time) of Modified-CS for Recursive Causal Sparse Reconstruction, Allerton 2010 (invited) Talk
  
  
• Wei Lu and Namrata Vaswani, Exact Reconstruction Conditions and Error Bounds for Regularized Modified Basis Pursuit, Asilomar  2010
• Samarjit Das and Namrata Vaswani, “Particle Filtered Modified Compressive Sensing (PaFiMoCS) for tracking signal sequences,” Asilomar 2010 (invited). Talk
• Wei Lu and Namrata Vaswani, Modified Basis Pursuit Denoising (Modified-BPDN) For Noisy Compressive Sensing With Partially Known Support, IEEE Intl. Conf. Acous. Speech. Sig.Proc.(ICASSP), 2010
• Wei Lu and Namrata Vaswani, Modified Compressive Sensing for Real-time Dynamic MR Imaging, IEEE Intl. Conf. Image Proc (ICIP), 2009
• Namrata Vaswani and Wei Lu,  Modified-CS: Modifying Compressive Sensing for Problems with Partially Known Support, IEEE Intl. Symp. Info. Theory (ISIT), 2009.
• Namrata Vaswani, Analyzing Least Squares and Kalman Filtered Compressed Sensing, IEEE Intl. Conf. Acous. Speech. Sig. Proc. (ICASSP), 2009.
• Chenlu Qiu, Wei Lu and Namrata Vaswani, Real-time Dynamic MR Image Reconstruction using Kalman Filtered Compressed Sensing, IEEE Intl. Conf. Acous. Speech. Sig. Proc. (ICASSP), 2009.
• S. Das and N. Vaswani, Efficient importance sampling techniques for large dimensional and multimodal posterior computations, IEEE Digital Signal Processing/SPE Workshop, Miami FL, Jan 2009 (invited)
• Namrata Vaswani, Kalman Filtered Compressed Sensing, IEEE Intl. Conf. Image Proc. (ICIP), 2008.
• Amit Kale and Namrata Vaswani, Generalized ELL for Detecting and Tracking Through Illumination Model Changes, IEEE Intl. Conf. Image Proc. (ICIP), 2008.
• Samarjit Das and Namrata Vaswani, Model-based Compression of Nonstationary Landmark Shape Sequences, IEEE Intl. Conf. Image Proc. (ICIP), 2008.
• Bi Song, Namrata Vaswani, Amit Roy-Chowdhury, Closed-loop Tracking and Change Detection in Multi-Activity Sequences,  IEEE Intl. Conf. on Computer Vision and Pattern Recognition (CVPR), 2007.
• Namrata Vaswani and Samarjit Das, Particle Filter with Efficient Importance Sampling and Mode Tracking (PF-EIS-MT) and its Application to Landmark Shape Tracking, Asilomar 2007 (invited)
• Amit Kale, Namrata Vaswani, Christopher Jaynes, Particle Filter with Mode Tracker (PF-MT)  for Visual Tracking across Illumination Change, IEEE Intl. Conf. on Acoustics, Speech and Signal Processing  (ICASSP), 2007
• Namrata Vaswani, PF-EIS and PF-MT: New Particle Filtering Algorithms for Multimodal Observation Likelihoods and Large Dimensional State Spaces, IEEE Intl. Conference on Acoustics, Speech and Signal Processing  (ICASSP), 2007
• Namrata Vaswani, Anthony Yezzi, Yogesh Rathi, Allen Tannenbaum, Particle Filters for Infinite (Or Large) Dimensional State Spaces - Part 1,  IEEE Intl. Conference on Acoustics, Speech and Signal Processing  (ICASSP), 2006.
• Namrata Vaswani,  Particle Filters for Infinite (Or Large) Dimensional State Spaces - Part 2 , IEEE Intl. Conference on Acoustics, Speech and Signal Processing  (ICASSP), 2006.
• Bi Song, Namrata Vaswani and Amit K. Roy-Chowdhury, Summarization and Indexing of Human Activity Sequences, IEEE Conf. on Image Processing (ICIP), 2006.
• NamrataVaswani, Anthony Yezzi, Yogesh Rathi, Allen Tannenbaum, Time-varying Finite Dimensional Basis for Tracking Contour Deformations, IEEE Conf. on Decision and Control (CDC), 2006.
• Yogesh Rathi, Namrata Vaswani , Allen Tannenbaum, Anthony Yezzi, "Particle Filtering for Geometric Active Contours and Application to Tracking Deforming Objects", IEEE Intl. Conference on Computer Vision and Pattern Recognition (CVPR), 2005, oral.
• Namrata Vaswani and Rama Chellappa,  NonStationary "Shape Activities",  IEEE Conf. on Decision and Control (CDC), 2005.
• Namrata Vaswani, " The Modified CUSUM Algorithm for Slow and Drastic Change Detection in General HMMs with Unknown Change Parameters",  IEEE Intl. Conference on Acoustics, Speech and Signal Processing (ICASSP), 2005. There is an error in section 3, first paragraph: the averaging (dividing by 1/p) should be removed.
• Namrata Vaswani, Bound on Errors in Particle Filtering with Incorrect Model Assumptions and  its Implication for Change Detection, IEEE Intl. Conference on Acoustics, Speech and Signal Processing  (ICASSP), 2004.  Selected among top 15% papers in Signal Processing Theory and Methods category, and received an invitation to submit to IEEE Signal Processing Society journals.
• Namrata Vaswani, "Change Detection in Partially Observed Nonlinear Dynamic Systems With  Unknown Change Parameters", American Control Conference (ACC), 2004.
• Namrata Vaswani, Rama Chellappa, "Classification Probability Analysis of Principal Component Null Space Analysis",   Intl. Conference on  Pattern Recognition (ICPR), 2004.
• Namrata Vaswani, A. RoyChowdhury, Rama Chellappa, "Activity Recognition Using the Dynamics of the Configuration of Interacting Objects",  IEEE Computer Vision and Pattern Recognition (CVPR), 2003.
• Namrata Vaswani, A. RoyChowdhury, R. Chellappa, Statistical Shape Theory for Activity Modeling, IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP), 2003.
• Namrata Vaswani and Rama Chellappa, A Particle Filtering Approach to Abnormality Detection in Nonlinear Systems and its Application to Abnormal Activity Detection, 3rd Intl. Workshop on Statistical and Computational Theories of Vision, held in conjunction with ICCV, 2003.
• R. Chellappa, N.Vaswani, A.RoyChowdhury, "Activity Modeling and Recognition Using Shape Theory",  Behavior Representation in Modeling and Simulation (BRIMS), 2003.
• Namrata Vaswani,  A  Linear Classifier for Gaussian Class Conditional Distributions with Unequal Covariance Matrices,  Intl. Conference on  Pattern Recognition (ICPR), 2002.
• NamrataVaswani and Rama Chellappa, Best View Selection and Compression of Moving Objects in IR Sequences,  IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP), 2001.
• Meeta Sharma, Namrata Vaswani and Suneet Tuli, "Novel Techniques for Time and Frequency Domain Characterization of Surface Acoustic Wave Devices", VIII National Symposium on Ultrasonics in 1997, at Amritsar, India.

Ph.D. Thesis: Change Detection in Stochastic Shape Dynamical Models with Applications  in Activity Modeling and Abnormal Activity Detection