Dr. Varun Mannam




Research Areas

| Email | LinkedIN | Google Scholar | Twitter | Research Gate | GitHub | Resume |

Papers (Currently published)

  1. Varun Mannam, and Scott Howard, “Improving fluorescence lifetime imaging microscopy phasor accuracy using convolutional neural networks”, (Frontiers Phasor Analysis for FLIM data) Published in Frontiers (2023) or .
  2. Varun Mannam, “Low-Energy Convolutional Neural Networks (CNNs) using Hadamard Method”, Published in IEEE Big-data 2022 or ArXiv in 2023.
  3. Varun Mannam, and Scott Howard, “Small Training Dataset Convolutional Neural Networks for Application Specific Super-Resolution Microscopy”, Published in Jounral of Biomedical Optics by SPIE or biorxiv in 2023.

Papers (Arxiv, BioRxiv)

  1. Low-cost video annotation using GenAI and work conducted in Artificial General Intelligence (AGI), Amazon.
  2. Multi-turn conversational chatbot for Amazon shopping using LLMs in Alexa AI, Amazon.

Papers (Draft/In prepartion/Submitted)

  1. Varun Mannam, and Scott Howard, “Deconvolution of fluorescence lifetime imaging microscopy (FLIM)”, (Biomedical Optics Express (BOE) Journal) Final review (2024).
  2. Varun Mannam, and Scott Howard, “Low dosage 3D volume fluorescence microscopy imaging using compressive sensing”, (Optics Letters Journal) In preparation (2024).
  3. Varun Mannam, “3D point cloud generation using connected components”, CVPR workshop, 2024.

Papers (Published)

  1. See my google scholar page: Google Scholar

Ph.D. doctoral dissertation

  1. Ph.D. Thesis

Master’s Thesis

  1. M.S. Thesis

Reviewer to the following jounrals

  1. Nature: Scientific Reports
  2. OSA: Applied Optics (AO)
  3. OSA: Biomedical Optics Express (BOE)
  4. OSA: Optics Express (OE)
  5. OSA: Optics Letters (OL)
  6. OSA: Photonics Research (PR)
  7. IEEE: jounranl of Biomedical and Health Informatics (j-BHI)
  8. SPIE: Journal of Biomedical Optics (JBO)
  9. SPIE: Optical Engineering
  10. SPIE: Journal of Electronic Imaging (JEI)



I am working as an Applied Scientist II in PXT Central Science team, which is part of People eXperience Technology organization at Aamzon, Bellevue. I was born in Ongole, Andhra Pradesh, India, and received a Bachelor of Technology and Master of Technology degree in Electronics and Communications Engineering from Bapatla Engineering College, Acharya Nagarjuna University, Guntur, Andhra Pradesh, India and Indian Institute of Technology Kharagpur (IIT KGP), West Bengal, India, in 2010 and 2012, respectively. From 2012-2017, I worked as a Staff Software Engineer to develop wireless communication protocols (like Bluetooth, WIFI) at National Instruments (R&D) Bangalore, India. Later, I joined the University of Notre Dame in 2017 to pursue a doctorate in Electrical Engineering. During my Ph.D. I worked with Dr. Scott Howard (Link) in the Biophotonics Research Group. My research is about the applications of fluorescence microscopy that could advance the work of other researchers and medical personnel in a wide variety of fields using the latest state-of-the-art computer vision techniques. My research interests include NLP, deep learning, machine learning, computer vision, Fluorescence lifetime imaging microscopy (FLIM), super-resolution, compressive sensing and, neural circuits.

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