Lokender Tiwari, PhD

About

Currently, I am the Head of Computer Vision/AI at BotLab Dynamics / Vayudh, where I lead the development of next-generation intelligence for drones. My team's mission is to engineer robust, autonomous systems capable of thriving in highly challenging, real-world scenarios.

Prior ot this, I spent 5+ years as a Senior Research Scientist and Principal Investigator at TCS Research, IIT-Delhi R&I Park. Leading a dedicated research team, I drove initiatives at the intersection of Computer Vision, Deep Learning, and Graphics. I oversaw the full lifecycle of innovation, from formulating research strategies and mentoring scientists and researchers to piloting advanced prototyps with enterprise clients.

Prior to joining TCS Research, I worked at NEC Laboratories America, with Prof. Manmohan Chandraker, Dr. Quoc-Huy Tran, and Dr. Pan Ji, where I developed world's first self-improving framework for SLAM. I received my PhD from IIIT-Delhi, with the Doctoral Dissertation Award. I was advised by Dr. Saket Anand and funded by prestegious Visvesvarya PhD fellowship. I am the recipient of Chancellor’s Gold Medal for academic excellence in B.Tech (Computer Science and Engineering) 2008-2012.

Research Interests

• Computer Vision: Scene & Image Understanding, 3D Reconstruction, Object Detection & Tracking, Segmentation, SLAM/VO
• Computer Graphics: Geometry Processing, Differentiable Rendering, Physics-Aware AR/VR/XR
• Generative AI: 2D / 3D / 4D Content Generation, Neural Physics-Based Simulators, Intuitive Physics
• Deep Learning: Machine Unlearning, Adversarial Attacks & Defense, and Hardware-Aware Modeling, AI on Edge
• Robust Estimation: Probabilistic and Statistical Modeling
• Application Areas: Defense, Industry 4.0/5.0, Entertainment & Rehabilitation, E-Commerce & Gaming

Education

• Ph.D. in CSE (Computer Vision & Deep Learning) Jul 2014 - Mar 2021 (Defended) IIIT-Delhi, India Thesis: Robust Scene Understanding | Adviser: Dr. Saket Anand
  Visvesvarya PhD Fellow | Doctoral Dissertation Award | US Patent Granted

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• M.Tech in CSE Jul 2012 - Jul 2014 CDAC, India Thesis: Robust Camera Captured Image Mosaicking for Document Digitization and OCR Processing

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• B.Tech in CSE Jul 2008 - Jul 2012 Faculty of Engineering & Technology, VBSPU, India Chancellor's Gold Medal (Rank-1) | University Topper

Industry Research Experience

• Head of Computer Vision / AI Nov 2025 - Present BotLab Dynamics / Vayudh Supervising R&D for robust drone vision and intelligence.

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• Senior Research Scientist / Principal Investigator Jun 2021 - Nov 2025
  Consulting Research Scientist Aug 2020 - Jun 2021 Tata Consultancy Services - Research, R&I Park IIT Delhi
  • Setup a new Visual Computing and Embodied AI research area, led several R&D projects at the intersection of Computer Vision, Graphics, AR/XR and Deep Learning. Tech transfer to business units.
  • Research Areas: 3D GenAI+XR, Spatial Intelligence, 3D Virtual Humans, 3D Scene & Human Understanding, Spatial Mapping, Simulation, Synthesis & Interactions.
  • Notable Awards: Best Paper Runner Up @ 3D4S, CVPR 2026 | Best Oral Paper Award @ ICVGIP'25 | Young Scientist Award | Innovation Pride Award | Top Seeds & Special Initiative Award.
  • Media Highlights: TechXplore | NDTV Gadgets360 | Business APAC

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• Summer Researcher May 2019 - Aug 2019 NEC Laboratories America, Inc. San Jose, USA Proposed world's first self-improving geometric-CNN SLAM/VO system [ Project Page | US Patent ]

Teaching Experience

As Full Instructor

• [ Course COV877 ] Special Module on Visual Computing at IIT-Delhi (2025).
• [ Tutorial ] Deep Learning for Autonomous Driving at 3D Vision Summer School, BITS-Pilani (2026).
• [ Tutorial ] Revisiting 3D Vision in the Deep Learning Era at SPCOM'26, IISc (2026).
• [ Tutorial ] Visual SLAM for Autonomous Driving and Flying at ICVGIP '2025, IIT-Mandi (2025).
• [ Tutorial ] Score-Based Generative Modeling at Summer School on AI, IIIT-Hyderabad (2025).
• [ Tutorial ] Text-to-3D Generation at 3D Vision Summer School, IIIT-Bangalore (2024).
• [ Tutorial ] 3D Garment Modeling and Animation at ICVGIP '2024, IIIT-Bangalore (2024).
• [ Invited Lectures ] Learning-Based SLAM at IIT-Delhi hosted by Prof. Chetan Arora (2022).

As Head Teaching Assistant

• Machine Learning (UG,PG), IIIT-Delhi, with Prof. Saket Anand and Prof. Anubha Gupta (Monsoon 2017, 2019).
• Computer Vision (UG,PG), IIIT-Delhi, with Prof. Saket Anand (Winter 2016, 2017, 2018).
• Computer Graphics (UG,PG), IIIT-Delhi, with Prof. Ojaswa Sharma (Monsoon 2014 and 2015).
• Data Structure & Algorithms (UG, PG), IIIT-Delhi (Summer Term 2016).
• Technical Communication (UG), IIIT-Delhi, with Prof. Pankaj Jalote (Winter 2015).

Awards & Fellowships

• 2026 Best Oral Paper Runner-up Award at 3D4S Workshop, CVPR 2026, Denver USA.
• 2025 Best Oral Paper Award at ICVGIP 2025, IIT Mandi.
• 2023 Young Scientist Award, Awarded by TCS Research.
• 2021 Doctoral Dissertation Award by IIIT-Delhi.
• 2018 IEEE WACV'2018 PhD Forum Award.
• 2017 Best Poster Award (2nd), Research Showcase 2017, held at IIIT-Delhi.
• 2016 Best Doctoral Symposium Award (3rd), ICVGIP'2016, held at IIT-Guwahati.
• 2016 IEEE Signal Processing Society Travel Award.
• 2015 Selected (13/250) for Prototype Stage of Mahindra Rise Driverless Car Challenge.
• Jul 2014-Jul 2019 Visvesvarya Ph.D. Fellowship.
• Jul 2012-Jun 2014 Graduate Fellowship, GATE.
• Feb 2013 University Gold Medal (Rank-1) for Academic Excellence (B.Tech).
• Dec 2010 MHRD & DST Award for 3rd Science Conclave at IIIT-Allahabad.

Publications

Journals

2026

[2] UltraNormal: Scaling Pretrained Diffusion-based Surface Normal Estimators to Ultra-High-Resolution

Satyam Bhardwaj, Lokender Tiwari, Shivam Ashok Shukla, Mritunjoy Halder, Aalok Gangopadhyay, Brojeshwar Bhowmick

To appear in Computer Graphics Forum, 2026

PDF

2022

[1] A Review on Monocular Tracking and Mapping: From Model-Based to Data-Driven Methods

Nivesh Gadipudi, Irraivan Elamvazuthi, Lila Iznita Izhar, Lokender Tiwari, Ramya Hebbalaguppe, Cheng-Kai Lu, Arockia Selvakumar Arockia Doss

In The Visual Computer, International Journal of Computer Graphics, 2022

PDF

Conferences/Workshops/Preprints

2026

[16] Fast and Robust Mesh Simplification for Generated and Real-World 3D Assets

Kunal Bhosikar, Preet Savalia, Lokender Tiwari, Brojeshwar Bhowmick

CVPR, 2026, 3D4S Workshop Oral Best Oral Paper Runner Up

PDF

2026

[15] Sketch3R: Rapid and Realistic 3D VR Sketch Creation to Shape Retrieval

Lokender Tiwari et.al.

In IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2026

PDF

2025

[14] GeMR: Multi-modal Interactive 3D Scene Composition in XR

Lokender Tiwari et.al.

In Indian Conference on Computer Vision, Graphics and Image Processing (ICVGIP), 2025 Oral Best Oral Paper Link

PDF

2025

[13] SketchTo3DGen: GenAI Powered Articulation Ready 3D Asset Ideation using 3D Sketches and Audio Descriptions

Lokender Tiwari et.al.

In ACM Virtual Reality Software and Technology (VRST), 2025

PDF

2025

[12] InGenCo: Integrated In-Place 3D Scenario Generation and Collaboration

Lokender Tiwari et.al.

In IEEE International Symposium on Mixed and Augmented Reality (ISMAR), 2025

PDF

2025

[11] Fast and Accurate 3D VR Sketch to 3D Shape Retrieval

Lokender Tiwari et.al.

In IEEE International Symposium on Mixed and Augmented Reality (ISMAR), 2025

PDF

2025

[10] DisFlowEm: One-Shot Emotional Talking Head Generation using Disentangled Pose and Expression Flow-Guidance

Sanjana Sinha, Brojeshwar Bhowmick, Lokender Tiwari, Sushovan Chanda

In IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2025 Oral

PDF

2023

[9] Enhanced Spatio-Temporal Context for Temporally Consistent Robust 3D Human Motion Recovery from Monocular Videos

Sushovan Chanda, Amogh Tiwari, Lokender Tiwari, Brojeshwar Bhowmick, Avinash Sharma, Hrishav Barua

In arXiv, 2023 Patent Granted

PDF

2023

[8] GenSim: Unsupervised Generic Garment Simulator

Lokender Tiwari, Brojeshwar Bhowmick, Sanjana Sinha

In CVPR, 2023, Deep Learning for Geometric Computing Workshop, Oral Patent Published

PDF

2023

[7] GarSim: Particle Based Neural Garment Simulator

Lokender Tiwari, Brojeshwar Bhowmick

In IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2023 Oral Patent Published

PDF

2022

[6] REGroup: Rank-aggregating Ensemble of Generative Classifiers for Robust Predictions

Lokender Tiwari, Anish Madan, Saket Anand and Subhasis Banerjee

In IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2022

PDF WEBSITE

2021

[5] DeepDraper: Fast and Accurate 3D Garment Draping over a 3D Human Body

Lokender Tiwari, Brojeshwar Bhowmick

In ICCV, 2021, Differentiable 3D Vision and Graphics Workshop, Oral Patent Granted

PDF

2020

[4] Pseudo RGB-D for Self-Improving Monocular SLAM and Depth Prediction

Lokender Tiwari, Pan Ji, Quoc-Huy Tran, Bingbing Zhuang, Saket Anand, Manmohan Chandraker

In European Conference on Computer Vision (ECCV), 2020 Oral Patent Granted

ARXIV BIB PDF WEBSITE

2018

[4] DGSAC: Density Guided SAmpling and Consensus

Lokender Tiwari, Saket Anand

In IEEE Winter Conference on Applications of Computer Vision (WACV), 2018 Oral

CODE PDF

2016

[3] Robust Multi-Model Fitting using Density and Preference Analysis

Lokender Tiwari, Saket Anand, Sushil Mittal

In 13th Asian Conference on Computer Vision (ACCV), Taipei, Taiwan, 2016

CODE PDF

2016

[2] Fast Hypothesis Filtering for Multi-Structure Geometric Model Fitting

Lokender Tiwari, Saket Anand

In IEEE International Conference on Image Processing(ICIP), Phoenix, Arizona, USA, 2016

PDF

Patents Granted / Published

Summary: 6 Granted and 7 Published

• [13] [US Patent Granted US12548175B2] Tiwari, Lokender, et al. "Method and system for estimating temporally consistent 3D human shape and motion from monocular video." Feb. 2026.
• [12] [European Patent Granted EP4446990B1] Tiwari, Lokender, et al. "Method and system for estimating temporally consistent 3D human shape and motion from monocular video." Feb. 2026.
• [11] [Indian Patent Granted 565533] Tiwari, Lokender, et al. "Method and system for draping a 3D garment on a 3D human body." April, 2025.
• [10] [US Patent Granted US11778162B2] Tiwari, Lokender, et al. "Method and system for draping a 3D garment on a 3D human body." Oct. 2023.
• [9] [European Patent Granted EP4064209A1] Tiwari, Lokender, et al. "Method and system for draping a 3D garment on a 3D human body." Jan, 2025.
• [8] [US Patent Granted US11468585B2] Tiwari, Lokender, et al. "Pseudo RGB-D for self-improving monocular slam and depth prediction." Oct. 2022.
• [7] [European Patent Published EP4471724A1] Tiwari, Lokender, Brojeshwar Bhowmick, and Sanjana SINHA. "Method and system for generic garment simulation.", Dec, 2024.
• [6] [US Patent Published US20240403508A1] Tiwari, Lokender, Brojeshwar Bhowmick, and Sanjana SINHA. "Method and system for generic garment simulation.", Dec, 2024.
• [5] [US Patent Published US20240078356A1] Tiwari, Lokender, and Brojeshwar Bhowmick. "Systems and methods for simulating garments on target body poses." June, 2024.
• [4] [European Patent Published EP4307171A1] Tiwari, Lokender, and Brojeshwar Bhowmick. "Systems and methods for simulating garments on target body poses.", Jan, 2024.
• [3] [Indian Patent Published 202321038154] Tiwari, Lokender, Brojeshwar Bhowmick, and Sanjana SINHA. "Method and system for generic garment simulation.", Jun, 2023.
• [2] [Indian Patent Published 202321026563] Tiwari, Lokender, et al. "Method and system for estimating temporally consistent 3D human shape and motion from monocular video.", April. 2023.
• [1] [Indian Patent Published 202221039816] Tiwari, Lokender, and Brojeshwar Bhowmick. "Systems and methods for simulating garments on target body poses." Jan, 2024.

Thesis Examiner & Mentorship

• [Examiner] Kunal Bhosikar, MS(CSE) Research, CVIT, IIIT-Hyderabad, Adviser: Prof Charu 2026.
• [Examiner] Amogh Tiwari, MS(CSE) Research, CVIT, IIIT-Hyderabad, Adviser: Prof Avinash.
• [External Mentor] Suraj Patni, MS(AI) IIT-Delhi, Adviser: Prof. Chetan Arora.
• [External Mentor] Karan Tanwar, B.Tech+MTech CSE IIT-Delhi, Adviser: Prof. Chetan Arora.

Interns Supervision

• Sourav Verma, Ph.D. CS, NIT-Jalandhar (2026 Industry Intern)
• Jashn Khameni, B.Tech CS, IIIT-Delhi (2026 Industry Intern)
• Ayaan Chaudhary, B.Tech CSAI, IIT-Jodhpur (2026 Industry Intern)
• Preet Savallia, B.Tech CSAI, IIT-Jodhpur, now Masters at CMU (2025 Industry Intern)
• Kunal Bhosikar, B.Tech + MS Research, IIIT-Hyderabad, now PhD @ MPI (2025 Industry Intern)
• Sreehari Rajan, B.Tech + MS Research, IIIT-Hyderabad (2025 Industry Intern)
• Harsh Singh, B.Tech, IIIT-Delhi - now Researcher at TCS Research (2024 Industry Intern)
• Richik Sarkar, B.Tech, IIT-Kharagpur - now Researcher at TCS Research (2023 Industry Intern)
• Anish Madan, B.Tech CSAM, IIIT-Delhi - Now masters at CMU (Thesis Mentorship)
• Amogh Tiwari, B.Tech + MS, IIIT-Hyderabad - Ph.D @ INRIA, Grenoble (2022 Industry Intern)
• Karan Tanwar, B.Tech + M.Tech, IIT-Delhi - Now SDE at AMAZON (2022 Thesis Mentorship)
• Suraj Patni, MS Research (AI), IIT-Delhi - Now SDE at Qualcomm (2024 Thesis Mentorship)
• Munender Varshney, Ph.D, IIT-Kanpur - Now Research Scientist at Hitachi (2023 Industry Intern)
• B.V Raghav, Ph.D, IIT-Kanpur - Now Assistant Professor at Thapar University (2022 Industry Intern)
• Sushovan Chanda - Now PhD student @ University of Göttingen (TCS Researcher Mentoring)

Workshop, Summer School, Special Track & Tutorials Organized

• [Co-Organizer] 3D Vision Summer School, 2024, 2025, 2026.
• [Organizer] Tutorial on Visual SLAM at ICVGIP, 2025, IIT Mandi.
• [Co-Chair] Workshop on Connected Vehicles & Autonomous Driving at COMSNETS, 2024.
• [Co-Organizer] Tutorial on 3D Garment Modeling at ICVGIP, 2024, with Prof. Avinash, IIT Jodhpur.
• [Co-Organizer] Special Track on Data-Efficient Visual Computing for Environmental and Social Good at 20th International Symposium on Visual Computing, USA.

Professional Services

• Regular Reviewer / Program Committee Members of Reputed Conference in CV, CG, DL, AR/XR Areas: CVPR, ICCV, ECCV, WACV, BMVC, 3DV, ICML, AAAI, ICLR, NeurIPS, ACMMM, ISMAR etc.
• Regular Reviewer of Reputed Journals in CV, CG, DL, AR/XR Areas: IJCV, CVIU, TCSVT, Computer Graphics Forum, Pattern Recognition.
• Served as evaluator for Smart India Hackathon organized by Govt. of India.

Keynote / Invited Talks

• Invited talk on Unboxing Deep Neural Networks using Information Theory at VIT-Vellore.
• Invited Guest Judge for the Project Showcase Event at Bennett University.
• Invited talk on Robust Scene Understanding at 43rd Kaggle Days Meetup Delhi-NCR.
• Invited talk on Metaverse: Current and The Future, a Visual Computing Perspective at Sushant University.
• Keynote talk on Scene Understanding at BITCON 2021, BITS Durg.