Saiprasad Ravishankar

ORCID

Publication Activity (10 Years)

Years Active: 2008-2024
Publications (10 Years): 92

Top Venues

CoRR

ICASSP

ICIP

IEEE Trans. Medical Imaging

Publications

Avrajit Ghosh, Michael T. McCann, Madeline Mitchell, Saiprasad Ravishankar
Learning Sparsity-Promoting Regularizers Using Bilevel Optimization. SIAM J. Imaging Sci. 17 (1) (2024)
Avrajit Ghosh, Xitong Zhang, Kenneth K. Sun, Qing Qu, Saiprasad Ravishankar, Rongrong Wang
Optimal Eye Surgeon: Finding Image Priors through Sparse Generators at Initialization. CoRR (2024)
Xiang Li, Soo Min Kwon, Ismail R. Alkhouri, Saiprasad Ravishankar, Qing Qu
Decoupled Data Consistency with Diffusion Purification for Image Restoration. CoRR (2024)
Ismail Alkhouri, Shijun Liang, Rongrong Wang, Qing Qu, Saiprasad Ravishankar
Diffusion-Based Adversarial Purification for Robust Deep Mri Reconstruction. ICASSP (2024)
Shijun Liang, Evan Bell, Qing Qu, Rongrong Wang, Saiprasad Ravishankar
Analysis of Deep Image Prior and Exploiting Self-Guidance for Image Reconstruction. CoRR (2024)
Siddhant Gautam, Angqi Li, Saiprasad Ravishankar
Patient-Adaptive and Learned Mri Data Undersampling Using Neighborhood Clustering. ICASSP (2024)
Bihan Wen, Saiprasad Ravishankar, Zhizhen Zhao, Raja Giryes, Jong Chul Ye
Physics-Driven Machine Learning for Computational Imaging [From the Guest Editor]. IEEE Signal Process. Mag. 40 (1) (2023)
Bihan Wen, Saiprasad Ravishankar, Zhizhen Zhao, Raja Giryes, Jong Chul Ye
Physics-Driven Machine Learning for Computational Imaging: Part 2 [From the Guest Editors]. IEEE Signal Process. Mag. 40 (2) (2023)
Chong Wang, Rongkai Zhang, Gabriel Maliakal, Saiprasad Ravishankar, Bihan Wen
Deep Reinforcement Learning Based Unrolling Network for MRI Reconstruction. ISBI (2023)
Zhiyuan Zha, Bihan Wen, Xin Yuan, Saiprasad Ravishankar, Jiantao Zhou, Ce Zhu
Learning Nonlocal Sparse and Low-Rank Models for Image Compressive Sensing: Nonlocal sparse and low-rank modeling. IEEE Signal Process. Mag. 40 (1) (2023)
Huijie Zhang, Yifu Lu, Ismail Alkhouri, Saiprasad Ravishankar, Dogyoon Song, Qing Qu
Improving Efficiency of Diffusion Models via Multi-Stage Framework and Tailored Multi-Decoder Architectures. CoRR (2023)
Evan Bell, Shijun Liang, Qing Qu, Saiprasad Ravishankar
Robust Self-Guided Deep Image Prior. ICASSP (2023)
Anish Lahiri, Gabriel Maliakal, Marc Louis Klasky, Jeffrey A. Fessler, Saiprasad Ravishankar
Sparse-View Cone Beam CT Reconstruction Using Data-Consistent Supervised and Adversarial Learning From Scarce Training Data. IEEE Trans. Computational Imaging 9 (2023)
Ling Chen, Zhishen Huang, Yong Long, Saiprasad Ravishankar
Enhancing Low-dose CT Image Reconstruction by Integrating Supervised and Unsupervised Learning. CoRR (2023)
Hui Li, Jinghan Jia, Shijun Liang, Yuguang Yao, Saiprasad Ravishankar, Sijia Liu
SMUG: Towards robust MRI reconstruction by smoothed unrolling. CoRR (2023)
Shijun Liang, Van Hoang Minh Nguyen, Jinghan Jia, Ismail Alkhouri, Sijia Liu, Saiprasad Ravishankar
Robust MRI Reconstruction by Smoothed Unrolling (SMUG). CoRR (2023)
Xiang Li, Saiprasad Ravishankar, Qing Qu
Robust Deep Image Recovery from Sparsely Corrupted and Sub-Sampled Measurements. CAMSAP (2023)
Hui Li, Jinghan Jia, Shijun Liang, Yuguang Yao, Saiprasad Ravishankar, Sijia Liu
SMUG: Towards Robust Mri Reconstruction by Smoothed Unrolling. ICASSP (2023)
Avrajit Ghosh, Michael T. McCann, Saiprasad Ravishankar
Bilevel Learning of ℓ1 Regularizers with Closed-Form Gradients (BLORC). ICASSP (2022)
Chong Wang, Rongkai Zhang, Saiprasad Ravishankar, Bihan Wen
REPNP: Plug-and-Play with Deep Reinforcement Learning Prior for Robust Image Restoration. CoRR (2022)
Zhishen Huang, Saiprasad Ravishankar
Single-Pass Object-Adaptive Data Undersampling and Reconstruction for MRI. IEEE Trans. Computational Imaging 8 (2022)
Xikai Yang, Zhishen Huang, Yong Long, Saiprasad Ravishankar
Multi-layer Clustering-based Residual Sparsifying Transform for Low-dose CT Image Reconstruction. CoRR (2022)
Anish Lahiri, Marc Louis Klasky, Jeffrey A. Fessler, Saiprasad Ravishankar
Sparse-view Cone Beam CT Reconstruction using Data-consistent Supervised and Adversarial Learning from Scarce Training Data. CoRR (2022)
Chong Wang, Rongkai Zhang, Saiprasad Ravishankar, Bihan Wen
REPNP: Plug-and-Play with Deep Reinforcement Learning Prior for Robust Image Restoration. ICIP (2022)
Avrajit Ghosh, Michael T. McCann, Madeline Mitchell, Saiprasad Ravishankar
Learning Sparsity-Promoting Regularizers using Bilevel Optimization. CoRR (2022)
Lanqing Guo, Zhiyuan Zha, Saiprasad Ravishankar, Bihan Wen
Exploiting Non-Local Priors via Self-Convolution for Highly-Efficient Image Restoration. IEEE Trans. Image Process. 31 (2022)
Shijun Liang, Anish Lahiri, Saiprasad Ravishankar
Adaptive Local Neighborhood-based Neural Networks for MR Image Reconstruction from Undersampled Data. CoRR (2022)
Shijun Liang, Ashwin Sreevatsa, Anish Lahiri, Saiprasad Ravishankar
LONDN-MRI: Adaptive Local Neighborhood-Based Networks for MR Image Reconstruction from Undersampled Data. ISBI (2022)
Zhishen Huang, Siqi Ye, Michael T. McCann, Saiprasad Ravishankar
Model-based Reconstruction with Learning: From Unsupervised to Supervised and Beyond. CoRR (2021)
Zhishen Huang, Marc Louis Klasky, Trevor Wilcox, Saiprasad Ravishankar
Physics-Driven Learning of Wasserstein GAN for Density Reconstruction in Dynamic Tomography. CoRR (2021)
Anish Lahiri, Guanhua Wang, Saiprasad Ravishankar, Jeffrey A. Fessler
Blind Primed Supervised (BLIPS) Learning for MR Image Reconstruction. IEEE Trans. Medical Imaging 40 (11) (2021)
Avrajit Ghosh, Michael T. McCann, Saiprasad Ravishankar
Bilevel learning of l1-regularizers with closed-form gradients(BLORC). CoRR (2021)
Shijun Liang, Berk Iskender, Bihan Wen, Saiprasad Ravishankar
Labmat: Learned Feature-Domain Block Matching For Image Restoration. ICIP (2021)
Lanqing Guo, Zhiyuan Zha, Saiprasad Ravishankar, Bihan Wen
Self-Convolution: A Highly-Efficient Operator for Non-Local Image Restoration. ICASSP (2021)
Siqi Ye, Zhipeng Li, Michael T. McCann, Yong Long, Saiprasad Ravishankar
Unified Supervised-Unsupervised (SUPER) Learning for X-Ray CT Image Reconstruction. IEEE Trans. Medical Imaging 40 (11) (2021)
Kaiyi Yang, Narong Borijindargoon, Boon Poh Ng, Saiprasad Ravishankar, Bihan Wen
Learning Sparsifying Transforms for Image Reconstruction in Electrical Impedance Tomography. ICASSP (2021)
Zhishen Huang, Saiprasad Ravishankar
Single-pass Object-adaptive Data Undersampling and Reconstruction for MRI. CoRR (2021)
Xuehang Zheng, Saiprasad Ravishankar, Yong Long, Marc Louis Klasky, Brendt Wohlberg
Two-Layer Residual Sparsifying Transform Learning for Image Reconstruction. ISBI (2020)
Xikai Yang, Yong Long, Saiprasad Ravishankar
Two-layer clustering-based sparsifying transform learning for low-dose CT reconstruction. CoRR (2020)
Brian E. Moore, Saiprasad Ravishankar, Raj Rao Nadakuditi, Jeffrey A. Fessler
Online Adaptive Image Reconstruction (OnAIR) Using Dictionary Models. IEEE Trans. Computational Imaging 6 (2020)
Bihan Wen, Saiprasad Ravishankar, Luke Pfister, Yoram Bresler
Transform Learning for Magnetic Resonance Image Reconstruction: From Model-Based Learning to Building Neural Networks. IEEE Signal Process. Mag. 37 (1) (2020)
Zhipeng Li, Saiprasad Ravishankar, Yong Long, Jeffrey A. Fessler
DECT-MULTRA: Dual-Energy CT Image Decomposition With Learned Mixed Material Models and Efficient Clustering. IEEE Trans. Medical Imaging 39 (4) (2020)
Xikai Yang, Xuehang Zheng, Yong Long, Saiprasad Ravishankar
Learned Multi-layer Residual Sparsifying Transform Model for Low-dose CT Reconstruction. CoRR (2020)
Saiprasad Ravishankar, Jong Chul Ye, Jeffrey A. Fessler
Image Reconstruction: From Sparsity to Data-Adaptive Methods and Machine Learning. Proc. IEEE 108 (1) (2020)
Xikai Yang, Yong Long, Saiprasad Ravishankar
Multi-layer Residual Sparsifying Transform (MARS) Model for Low-dose CT Image Reconstruction. CoRR (2020)
Siqi Ye, Saiprasad Ravishankar, Yong Long, Jeffrey A. Fessler
SPULTRA: Low-Dose CT Image Reconstruction With Joint Statistical and Learned Image Models. IEEE Trans. Medical Imaging 39 (3) (2020)
Lanqing Guo, Saiprasad Ravishankar, Bihan Wen
Self-Convolution: A Highly-Efficient Operator for Non-Local Image Restoration. CoRR (2020)
Michael T. McCann, Saiprasad Ravishankar
Supervised Learning of Sparsity-Promoting Regularizers for Denoising. CoRR (2020)
Zhipeng Li, Saiprasad Ravishankar, Yong Long, Jeffrey A. Fessler
DECT-MULTRA: Dual-Energy CT Image Decomposition With Learned Mixed Material Models and Efficient Clustering. CoRR (2019)
Zhipeng Li, Siqi Ye, Yong Long, Saiprasad Ravishankar
SUPER Learning: A Supervised-Unsupervised Framework for Low-Dose CT Image Reconstruction. ICCV Workshops (2019)
Bihan Wen, Saiprasad Ravishankar, Yoram Bresler
VIDOSAT: High-Dimensional Sparsifying Transform Learning for Online Video Denoising. IEEE Trans. Image Process. 28 (4) (2019)
Saiprasad Ravishankar, Jong Chul Ye, Jeffrey A. Fessler
Image Reconstruction: From Sparsity to Data-adaptive Methods and Machine Learning. CoRR (2019)
Zhipeng Li, Siqi Ye, Yong Long, Saiprasad Ravishankar
SUPER Learning: A Supervised-Unsupervised Framework for Low-Dose CT Image Reconstruction. CoRR (2019)
Xuehang Zheng, Saiprasad Ravishankar, Yong Long, Marc Louis Klasky, Brendt Wohlberg
Multi-layer Residual Sparsifying Transform Learning for Image Reconstruction. CoRR (2019)
Bihan Wen, Saiprasad Ravishankar, Luke Pfister, Yoram Bresler
Transform Learning for Magnetic Resonance Image Reconstruction: From Model-based Learning to Building Neural Networks. CoRR (2019)
Saiprasad Ravishankar, Anna Ma, Deanna Needell
Analysis of Fast Alternating Minimization for Structured Dictionary Learning. ITA (2018)
Zhipeng Li, Saiprasad Ravishankar, Yong Long, Jeffrey A. Fessler
Image-domain material decomposition using data-driven sparsity models for dual-energy CT. ISBI (2018)
Saiprasad Ravishankar, Brendt Wohlberg
Learning Multi-Layer Transform Models. Allerton (2018)
Saiprasad Ravishankar, Brendt Wohlberg
Learning Multi-Layer Transform Models. CoRR (2018)
Zhipeng Li, Saiprasad Ravishankar, Yong Long, Jeffrey A. Fessler
Learned Mixed Material Models for Efficient Clustering Based Dual-Energy CT Image Decomposition. GlobalSIP (2018)
Saiprasad Ravishankar, Anish Lahiri, Cameron Blocker, Jeffrey A. Fessler
Deep dictionary-transform learning for image reconstruction. ISBI (2018)
Brian E. Moore, Saiprasad Ravishankar, Raj Rao Nadakuditi, Jeffrey A. Fessler
Online Adaptive Image Reconstruction (OnAIR) Using Dictionary Models. CoRR (2018)
Xuehang Zheng, Saiprasad Ravishankar, Yong Long, Jeffrey A. Fessler
PWLS-ULTRA: An Efficient Clustering and Learning-Based Approach for Low-Dose 3D CT Image Reconstruction. IEEE Trans. Medical Imaging 37 (6) (2018)
Saiprasad Ravishankar, Anna Ma, Deanna Needell
Analysis of Fast Structured Dictionary Learning. CoRR (2018)
Saiprasad Ravishankar, Anna Ma, Deanna Needell
Analysis of Fast Alternating Minimization for Structured Dictionary Learning. CoRR (2018)
Xuehang Zheng, Zening Lu, Saiprasad Ravishankar, Yong Long, Jeffrey A. Fessler
Low Dose CT Image Reconstruction With Learned Sparsifying Transform. CoRR (2017)
Saiprasad Ravishankar, Il Yong Chun, Jeffrey A. Fessler
Physics-driven deep training of dictionary-based algorithms for MR image reconstruction. ACSSC (2017)
Saiprasad Ravishankar, Brian E. Moore, Raj Rao Nadakuditi, Jeffrey A. Fessler
Efficient online dictionary adaptation and image reconstruction for dynamic MRI. ACSSC (2017)
Bihan Wen, Saiprasad Ravishankar, Yoram Bresler
VIDOSAT: High-dimensional Sparsifying Transform Learning for Online Video Denoising. CoRR (2017)
Siqi Ye, Saiprasad Ravishankar, Yong Long, Jeffrey A. Fessler
Adaptive sparse modeling and shifted-poisson likelihood based approach for low-dosect image reconstruction. MLSP (2017)
Saiprasad Ravishankar, Brian E. Moore, Raj Rao Nadakuditi, Jeffrey A. Fessler
Low-Rank and Adaptive Sparse Signal (LASSI) Models for Highly Accelerated Dynamic Imaging. IEEE Trans. Medical Imaging 36 (5) (2017)
Saiprasad Ravishankar, Raj Rao Nadakuditi, Jeffrey A. Fessler
Efficient Sum of Outer Products Dictionary Learning (SOUP-DIL) and Its Application to Inverse Problems. IEEE Trans. Computational Imaging 3 (4) (2017)
Brian E. Moore, Saiprasad Ravishankar
Online data-driven dynamic image restoration using DINO-KAT models. ICIP (2017)
Bihan Wen, Saiprasad Ravishankar, Yoram Bresler
Learning flipping and rotation invariant sparsifying transforms. ICIP (2016)
Saiprasad Ravishankar, Brian E. Moore, Raj Rao Nadakuditi, Jeffrey A. Fessler
Efficient learning of dictionaries with low-rank atoms. GlobalSIP (2016)
Saiprasad Ravishankar, Brian E. Moore, Raj Rao Nadakuditi, Jeffrey A. Fessler
LASSI: A low-rank and adaptive sparse signal model for highly accelerated dynamic imaging. IVMSP (2016)
Xuehang Zheng, Zening Lu, Saiprasad Ravishankar, Yong Long, Jeffrey A. Fessler
Low dose CT image reconstruction with learned sparsifying transform. IVMSP (2016)
Saiprasad Ravishankar, Yoram Bresler
Data-Driven Learning of a Union of Sparsifying Transforms Model for Blind Compressed Sensing. IEEE Trans. Computational Imaging 2 (3) (2016)
Saiprasad Ravishankar, Brian E. Moore, Raj Rao Nadakuditi, Jeffrey A. Fessler
Low-rank and Adaptive Sparse Signal (LASSI) Models for Highly Accelerated Dynamic Imaging. CoRR (2016)
Saiprasad Ravishankar, Raj Rao Nadakuditi, Jeffrey A. Fessler
Sum of outer products dictionary learning for inverse problems. GlobalSIP (2016)
Saiprasad Ravishankar, Raj Rao Nadakuditi, Jeffrey A. Fessler
Efficient Sum of Outer Products Dictionary Learning (SOUP-DIL) - The $\ell_0$ Method. CoRR (2015)
Saiprasad Ravishankar, Yoram Bresler
Sparsifying Transform Learning With Efficient Optimal Updates and Convergence Guarantees. IEEE Trans. Signal Process. 63 (9) (2015)
Saiprasad Ravishankar, Yoram Bresler
Data-Driven Learning of a Union of Sparsifying Transforms Model for Blind Compressed Sensing. CoRR (2015)
Saiprasad Ravishankar, Bihan Wen, Yoram Bresler
Online Sparsifying Transform Learning - Part I: Algorithms. IEEE J. Sel. Top. Signal Process. 9 (4) (2015)
Saiprasad Ravishankar, Raj Rao Nadakuditi, Jeffrey A. Fessler
Efficient Sum of Sparse Outer Products Dictionary Learning (SOUP-DIL). CoRR (2015)
Saiprasad Ravishankar, Yoram Bresler
Efficient Blind Compressed Sensing Using Sparsifying Transforms with Convergence Guarantees and Application to MRI. CoRR (2015)
Saiprasad Ravishankar, Yoram Bresler
Online Sparsifying Transform Learning - Part II: Convergence Analysis. IEEE J. Sel. Top. Signal Process. 9 (4) (2015)
Bihan Wen, Yoram Bresler, Saiprasad Ravishankar
FRIST - Flipping and Rotation Invariant Sparsifying Transform Learning and Applications. CoRR (2015)
Bihan Wen, Saiprasad Ravishankar, Yoram Bresler
Video denoising by online 3D sparsifying transform learning. ICIP (2015)
Bihan Wen, Saiprasad Ravishankar, Yoram Bresler
Structured Overcomplete Sparsifying Transform Learning with Convergence Guarantees and Applications. Int. J. Comput. Vis. 114 (2-3) (2015)
Saiprasad Ravishankar, Yoram Bresler
Sparsifying Transform Learning with Efficient Optimal Updates and Convergence Guarantees. CoRR (2015)
Saiprasad Ravishankar, Yoram Bresler
Efficient Blind Compressed Sensing Using Sparsifying Transforms with Convergence Guarantees and Application to Magnetic Resonance Imaging. SIAM J. Imaging Sci. 8 (4) (2015)
Bihan Wen, Saiprasad Ravishankar, Yoram Bresler
Learning overcomplete sparsifying transforms with block cosparsity. ICIP (2014)
Saiprasad Ravishankar, Yoram Bresler
Doubly sparse transform learning with convergence guarantees. ICASSP (2014)
Saiprasad Ravishankar, Bihan Wen, Yoram Bresler
Online sparsifying transform learning for signal processing. GlobalSIP (2014)
Saiprasad Ravishankar, Yoram Bresler
Learning Sparsifying Transforms. IEEE Trans. Signal Process. 61 (5) (2013)
Saiprasad Ravishankar, Yoram Bresler
Sparsifying transform learning for Compressed Sensing MRI. ISBI (2013)
Saiprasad Ravishankar, Yoram Bresler
Closed-form solutions within sparsifying transform learning. ICASSP (2013)
Saiprasad Ravishankar, Yoram Bresler
Learning Doubly Sparse Transforms for Images. IEEE Trans. Image Process. 22 (12) (2013)
Saiprasad Ravishankar, Yoram Bresler
Learning overcomplete sparsifying transforms for signal processing. ICASSP (2013)

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Publication Activity (10 Years)

Top Topics

Top Venues

Saiprasad Ravishankar