Publications.

Google Scholar. US Patents.

Patent grants.

1. Viktor Wase, Erik Ljungzell, Mark Ainsley Ryan, Chiara Giordano, Rickard Lundahl, Pravin Kumar Rana:
   Eye Tracking System,
   US Patent 12,374,071, July 2025, (Assignee: Tobii AB).
2. Pravin Kumar Rana and Gérald Bianchi:
   Methods and Systems for a Head-mounted Device for Updating an Eye Tracking Model,
   US Patent 11,934,571, March 2024, (Assignee: Tobii AB).
3. Mikael Rosell, Simon Johansson, Pravin Kumar Rana, Yimu Wang, Gilfredo Remon Salazar:
   Eye Gaze Tracking System, Associated Methods and Computer Programs,
   US Patent 11,823,413, November 2023, (Assignee: Tobii AB).
4. Pravin Kumar Rana:
   Method, Computer Program Product, Control Unit and Head-Mounted Display for Conserving Energy in an Eye Tracking System,
   US Patent 11,681,368, June 2023, (Assignee: Tobii AB).
5. Tiesheng Wang, Gilfredo Remon Salazar, Yimu Wang, Pravin Kumar Rana, Mark Ainsley Ryan, Johannes Kron, Torbjörn Sundberg:
   Gaze Tracking using Mapping of Pupil Center Position,
   US Patent 11,681,366, June 2023, (Assignee: Tobii AB).
6. Mikael Rosell, Simon Johansson, Pravin Kumar Rana, Yimu Wang, Gilfredo Remon Salazar:
   Eye Gaze Tracking System, Associated Methods and Computer Programs,
   US Patent 11,593,962, February 2023, (Assignee: Tobii AB).
7. Yimu Wang, Ylva Björk, Joakim Zachrisson, and Pravin Kumar Rana:
   Method and Device for Detecting a Shadow in a Head Mounted Device,
   US Patent 11,556,006, January 2023, (Assignee: Tobii AB).
8. Tiesheng Wang, Pravin Kumar Rana, Yimu Wang, Mark Ainsley Ryan:
   Detecting Relocation of a Head-Mounted Device,
   US Patent 11,259,010, February 2022, (Assignee: Tobii AB).
9. Tiesheng Wang, Gilfredo Remon Salazar, Yimu Wang, Pravin Kumar Rana, Mark Ainsley Ryan, Johannes Kron, Torbjörn Sundberg:
   Gaze Tracking using Mapping of Pupil Center Position,
   US Patent 11,249,547, February 2022, (Assignee: Tobii AB).
10. Pravin Kumar Rana and Yimu Wang:
    Method and System for Glint/Reflection Identification,
    US Patent 11,243,607, February 2022, (Assignee: Tobii AB).
11. Pravin Kumar Rana, Macarena Garcia Romero, Yimu Wang, and Rickard Lundahl:
    Iterative Point Indexing,
    US Patent 11,232,594, January 2022, (Assignee: Tobii AB).
12. Mark Ainsley Ryan, Jonas Sjöstrand, Erik Lindén, Pravin Kumar Rana:
    Updating a Cornea Model,
    US Patent 11,061,473, July 2021, (Assignee: Tobii AB).
13. Mark Ainsley Ryan, Torbjörn Sundberg, Pravin Kumar Rana, and Yimu Wang:
    Determining Eye Openness with an Eye Tracking Device,
    US Patent 10,852,531, December 2020, (Assignee: Tobii AB).
14. Pravin Kumar Rana and Daniel Tornéus:
    Lens Position Adjustment in a Wearable Device,
    US Patent 10,642,028, May 2020, (Assignee: Tobii AB).
15. Mark Ainsley Ryan, Torbjörn Sundberg, Pravin Kumar Rana, and Yimu Wang:
    Determining Eye Openness with an Eye Tracking Device,
    US Patent 10,394,019, August 2019, (Assignee: Tobii AB).
16. Pravin Kumar Rana, Daniel Tornéus, and Jonas Andersson:
    Method and System for Controlling Illuminators,
    US Patent 10,342,425, July 2019, (Assignee: Tobii AB).
17. Pravin Kumar Rana and Yimu Wang:
    Method and System for Glint/Reflection Identification,
    US Patent 10,324,529, June 2019, (Assignee: Tobii AB).
18. Pravin Kumar Rana and Yimu Wang:
    Method and System for Glint/Reflection Identification,
    US Patent 10,288,879, May 2019, (Assignee: Tobii AB).
19. Markus Flierl, Pravin Kumar Rana, Ivana Girdzijauskas, Thomas Rusert, and Apostolos Georgakis:
    Methods and Arrangements for 3D Scene Representation,
    US Patent 9,451,233, September 2016, (Assignee: Telefonaktiebolaget LM Ericsson AB).
20. Markus Flierl, Pravin Kumar Rana, and Ivana Girdzijauskas:
    Method and Processor for 3D Scene Representation,
    US Patent 9,235,920, January 2016, (Assignee: Telefonaktiebolaget LM Ericsson AB).

Patent applications.

1. Mårten Slein, Huu Lee, Pravin Kumar Rana:
   Estimating Prescription Glasses Strength for Head-Mounted Display Users,
   US Patent Application 19/212,826, November 2025, (Assignee: Tobii AB).
2. Shanker Keshavdas, Rickard Lundahl, Pravin Kumar Rana, Neda Zamani:
   Eye Tracking System and Methods of Using an Eye Tracking System,
   US Patent Application 18/762,735, Jan 2025, (Assignee: Tobii AB).
3. Simon Johansson, Mikael Rosell, Erik Ljungzell, Rickard Lundahl, Pravin Kumar Rana, Shanker Keshavdas, Neda Zamani, Hanwei Wu:
   Eye Tracking System and Methods of Using an Eye Tracking System,
   US Patent Application 18/607,639, Sep 2024, (Assignee: Tobii AB).
4. Pravin Kumar Rana, Ola Grimåker, and Mårten Selin:
   Illuminator System for Eye-Tracking System,
   US Patent Application 18/408,635, July 2024, (Assignee: Tobii AB).
5. Pravin Kumar Rana, Yimu Wang, Daniel Tornéus, Gilfredo Remon Salazar, Pontus Christian Walck:
   Eye Tracking System,
   US Patent Application 18/212,263, December 2023, (Assignee: Tobii AB).
6. Pravin Kumar Rana, Daniel Tornéus, and Jonas Andersson:
   Method and System for Controlling Illuminators,
   US Patent Application 16/506398, June 2020, (Assignee: Tobii AB).

Preprints.

1. Pravin Kumar Rana and Markus Flierl:
   Inter-view Depth Consistency Testing in Depth Difference Subspace,
   arXiv Preprint arXiv:2301.11752, January 2023. (Webpage)

Peer-reviewed journal articles.

1. Pravin Kumar Rana, Jalil Taghia, Zhanyu Ma, and Markus Flierl:
   Probabilistic Multiview Depth Image Enhancement Using Variational Inference,
   In IEEE Journal of Selected Topics in Signal Processing, Special Issue on Interactive Media Processing for Immersive Communication, Volume 9, Issue 3, April 2015. (Webpage)
2. Zhanyu Ma, Pravin Kumar Rana, Jalil Taghia, Markus Flierl, and Arne Leijon:
   Bayesian Estimation of Dirichlet Mixture Model with Variational Inference,
   In Pattern Recognition, Elsevier, Volume 47, Issue 9, September 2014.
3. Pravin Kumar Rana, Mihir Kumar Dash, Aurobinda Routray, and Prem Chand Pandey:
   Prediction of Sea Ice Edge in the Antarctic using GVF Snake Model,
   In Journal of the Geological Society of India, Volume 78, Number 2, August 2011. (Webpage)

Peer-reviewed conference proceedings.

1. Pravin Kumar Rana, Jalil Taghia, and Markus Flierl:
   Statistical Methods for Inter-view Depth Enhancement,
   In Proceedings of 3DTV-Conference: The True Vision - Capture, Transmission and Display of 3D Video (3DTV CON), Special Session on Free-Viewpoint Television and Related Technologies, Budapest, Hungary, July 2014.
2. Pravin Kumar Rana, Zhanyu Ma, Jalil Taghia, and Markus Flierl:
   Multiview Depth Map Enhancement by Variational Bayes Inference Estimation of Dirichlet Mixture Models,
   In Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Vancouver, Canada, May 2013.
3. Pravin Kumar Rana, Jalil Taghia, and Markus Flierl:
   A Variational Bayesian Inference Framework for Multiview Depth Image Enhancement,
   In Proceedings of IEEE International Symposium on Multimedia (ISM), Irvine, California USA, December 2012.
4. Srinivas Parthasarathy, Akul Chopra, Emilie Baudin, Pravin Kumar Rana, and Markus Flierl:
   Denoising of Volumetric Depth Confidence for View Rendering,
   In Proceedings of 3DTV-Conference The True Vision: Capture, Transmission and Display of 3D Video (3DTV CON), Zurich, Switzerland, October 2012. (Webpage)
5. Pravin Kumar Rana and Markus Flierl:
   Depth Pixel Clustering for Consistency Testing of Multiview Depth,
   In Proceedings of European Signal Processing Conference (EUSIPCO), Bucharest, Romania, August 2012.
6. Pravin Kumar Rana and Markus Flierl:
   View Interpolation with Structured Depth from Multiview Video,
   In Proceedings of European Signal Processing Conference (EUSIPCO), Barcelona, Spain, August 2011. (Webpage)
7. Pravin Kumar Rana and Markus Flierl:
   Depth Consistency Testing for Improved View Interpolation,
   In Proceedings of IEEE International Workshop on Multimedia Signal Processing (MMSP), Saint-Malo, France, October 2010.

Technical reports.

1. Apostolos Georgakis, Pravin Kumar Rana, and Ivana Radulovic:
   3DTV Exploration Experiments (EE1 & EE4) on the Lovebird1 Data Set,
   In Tech. Rep. M16977, MPEG ISO/IEC JTC 1/SC 29/WG, Xian, China, October 2009, (in collaboration with Telefonaktiebolaget LM Ericsson AB).

Conference abstracts.

1. Pravin Kumar Rana, Aurobinda Routray, Mihir Kumar Dash, and Prem Chand Pandey:
   Prediction of Antarctic Sea Ice Edge Using Artificial Intelligence,
   In SCAR/IASC International Polar Year Open Science Conference, Abstract S1.6/O28, St. Petersburg, Russia, July 2008.

Miscellaneous.

1. Pravin Kumar Rana:
   Taking Television Viewing To A New Dimension,
   KTH Royal Institute of Technology, Stockholm, Sweden, October 2011.