About

I am a Research Scientist at Amazon Ads. I obtained my Ph.D. degree in 2021, from the University of Illinois at Urbana-Champaign (UIUC), Department of Electrical and Computer Engineering (ECE). In 2014, I graduated with an M.E. degree in Multimedia Communication Systems from Eurecom, Télécom ParisTech. I received my B.S. degree in 2011 from the University of Science, Vietnam National University.

My research centers on improving the efficiency of temporal information modeling in deep networks across different domains, including vision and audio. Specifically, I am interested in applications in the area of video analysis, such as action recognition, detection, and sampling.

Research Interests

Action Detection and Recognition, Machine Learning, Computer Vision, and Signal Processing.

Current and Past Affiliations

Amazon Ads 2021-Present	UIUC 2016-2021	C3SR 2016-2020

Facebook Reality Labs Summer 2020	Texas Instruments Summer 2019	IBM Watson Summer 2018	IBM Watson Summer 2017

Full publication list on Google Scholar.

Patents

1. Khoi-Nguyen C. Mac, Raymond Yeh, Dhiraj Joshi, Minh N. Do, Rogerio S. Feris, and Jinjun Xiong. "Action Detection by Exploiting Motion in Receptive Fields", US20190354835A1, filed in May 2018.

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Journal Publications and Preprints

	Efficient Human Vision Inspired Action Recognition using Adaptive Spatiotemporal Sampling Khoi-Nguyen C. Mac, Minh N. Do, and Minh P. Vo arXiv preprint arXiv:2207.05249 PDF Code
	Automatic Curation of Sports Highlights using Multimodal Excitement Features Michele Merler, Khoi-Nguyen C. Mac, Dhiraj Joshi, Quoc-Bao Nguyen, Stephen Hammer, John Kent, Jinjun Xiong, Minh N. Do, John R. Smith, and Rogerio S. Feris IEEE Transactions on Multimedia (TMM), May 2019 Project PDF

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Conference Publications

	Learning Motion in Feature Space: Locally-Consistent Deformable Convolution Networks for Fine-Grained Action Detection Khoi-Nguyen C. Mac, Dhiraj Joshi, Raymond A. Yeh, Jinjun Xiong, Rogerio S. Feris, and Minh N. Do International Conference on Computer Vision (ICCV), October 2019 (Oral) Project PDF Code
	Large-Scale Mixed-Bandwidth Deep Neural Network Acoustic Modeling for Automatic Speech Recognition Khoi-Nguyen C. Mac, Xiaodong Cui, Wei Zhang, and Michael Picheny International Speech Communication Association (INTERSPEECH), September 2019 (Oral) Project PDF
	Multimodal Smart Interactive Presentation System Hoang-An Le, Khoi-Nguyen C. Mac, Truong-An Pham, Vinh-Tiep Nguyen, and Minh-Triet Tran International Conference on Human-Computer Interaction (HCI International), July 2013 PDF
	Realtime Pointing Gesture Recognition and Applications in Multi-user Interaction Hoang-An Le, Khoi-Nguyen C. Mac, Truong-An Pham, and Minh-Triet Tran Asian Conference on Intelligent Information and Database Systems (ACIIDS), March 2013 PDF
	SIM-Smart Interactive Map with Pointing Gestures Hoang-An Le, Khoi-Nguyen C. Mac, Truong-An Pham, Vinh-Tiep Nguyen, Minh-Triet Tran, and Anh-Duc Duong Intelligent Human-Machine Systems and Cybernetics (IHMSC), August 2012 PDF

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Workshop Publications

The Excitement of Sports: Automatic Highlights Using Audio/Visual Cues Michele Merler, Dhiraj Joshi, Khoi-Nguyen C. Mac, Quoc-Bao Nguyen, John Kent, Stephen Hammer, Jinjun Xiong, Minh N. Do, John R. Smith, and Rogerio S. Feris Computer Vision and Pattern Recognition Workshops (CVPRW), August 2018 PDF

SHREC'16 Track: Partial Shape Queries for 3D Object Retrieval I. Pratikakis, M.A. Savelonas, F. Arnaoutoglou, G. Ioannakis, A. Koutsoudis, T. Theoharis, M.T. Tran, V.T. Nguyen, V.K. Pham, H.D. Nguyen, H.A. Le, B.H. Tran, Q.H. To, M.B. Truong, T.V. Phan, M.D. Nguyen, T.A. Than, K-N.C. Mac, M.N. Do, A.D. Duong, T. Furuya, R. Ohbuchi, M. Aono, S. Tashiro, D. Pickup, X. Sun, P.L. Rosin, and R.R. Martin Eurographics 2016 Workshop on 3D Object Retrieval (3DOR), May 2016 PDF

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• Join Amazon Ads as a Research Scientist.
• Successfully defend my doctoral dissertation:
  "Learning Efficient Temporal Information in Deep Networks:
  from the Viewpoints of Applications and Modeling".
• Start my internship at Facebook Reality Labs.
• Pass my Preliminary Examination for the Ph.D. degree.
• Attend ICCV2019 in Seoul, Korea.
• Our video is selected as "Video of the Month" in CSL. [link]
• Our paper "Learning motion in feature space" is accepted as oral presentation by ICCV 2019.
• Our paper is accepted as oral presentation by INTERSPEECH 2019.
• Start my internship at Texas Instruments.
• Our paper is accepted by IEEE, TMM.
• Start my internship at IBM Watson.
• Give a talk at CSL Student Conference 2018.
• Our auto-curation of tennis highlights is deployed for US Open tournament 2017.
  [Official Highlights] [Demo] [IBM's] [Newyork Times'] [SportTechie's]
• Our auto-curation of tennis highlights is deployed for Wimbledon tournament 2017.
  [Official Highlights] [Demo] [IBM's] [CNET's] [FoxNews']
• Start my internship at IBM Watson.
• Start Ph.D. program at UIUC.