Research

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Graduate Research: Masters in Digital Media and Communication (Computational Imaging, MIT Media Lab)

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Fall 2010

Hidden Object Doppler: Femtosecond Transient Imaging

My masters thesis at MIT Media Lab introduces the areas of Non-line-of-sight Computer Vision hardware as well as algorithmic framework for vision around corners.

We pioneer algorithms for Non-Line-of-Sight vision by overcoming the hardware limitations of ultrafast streak cameras and femtosecond short pulse lasers by using novel techniques that achieve goals irrespective of the hardware shortcomings.

Presently we have promising results that will go public soon.

More details on the Transient Imaging Vision. Stay tuned.


Research- Media coverage: 

BBC News  'Laser camera takes photos around corners'

Slashdot  'Laser camera can see around corners'

Engadget  'MIT's laser camera takes photos around corners, renders camouflage useless'



Publication:

Hidden Object Doppler: Estimating Motion and Size of Moving Non-Line-of-Sight Objects in Cluttered Environment

R Pandharkar, A Velten, A Bardagjy, E Lawson, M Bawendi, R Raskar, pg 265-272, IEEE CVPR 2011


Project details from the group research page: 

MIT Media Lab, Camera Culture group - Ramesh Raskar-(my awesome advisor),

http://web.media.mit.edu/~raskar/femto/


Ramesh Raskar introducing the concept of Transient Imaging:



Fall 2009

Mask based Lightfield Camera for De blurring


  Rohit Pandharkar, Ahmed Kirmani, Ramesh Raskar

  Optical Society of America Imaging Systems Conference, 2010


Compressive Sensing for Multidimensional Visual Signals

Applying Compressive Sensing concept to 2D,3D,4D visual signals. 

(Unpublished work) 


Spring 2010

Transient Imaging: Scene Properties using transient light transport


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Undergraduate Research: BTech Electronics and Telecommunciations at College of Engineering Pune

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Loreal Ingenius International Finals : PARIS


Represented India at the International Finals of Loreal Ingenius 2008, France Paris, where we competed against teams from Cornell, Cambridge and Ecole Centrale Paris. The Ingenius Research work was based on both technical and strategic research. We worked on the Fast Moving Consumer Goods Manufacturing strategies, parallel manufacturing and power optimization.


Indo US Research Academy by Rensselaer Polytechnic USA

 

Was mentored by the team from Indian Institute of Technology Kanpur and Rensellaer Polytechnic in the area of 3D Tomographic Image Reconstruction using grayscale thresholding for the research academy.

 

Summer Internship - 2008 at IIT Bombay :

 

Worked under Prof. V. M. Gadre at Dept of Electrical Engineering, IIT Bombay on 'Development of new algorithms for  joint source-channel coding and encryption of signals '.

 

a) Developed a new algorithm using inverse matrices in Linear Block Coding which allows joint channel coding and encryption of signals. (pdf)

b) Formally analysed the Diffusion characteristics of signals which are simultaneously encrypted and source coded using shuffled Huffman trees (pdf)

c) Analyzed limitations of joint source coding and encryption and as a solution built a physical input based Random Number Generator and an authentication protocol.(pdf)

 

Junior Year Project in Imaging Systems : DigiSketch

 

 

Developed a Digital Sketching Assistant - a classroom teaching tool to be used for perfect sketches during tutoring. It involved design and construction of a USB based mimio-like device : optical pen, which when used to draw, feeds coordinates to the software program in real-time synchronization with minimal delay. The software program takes in the coordinates, and gets the 'real sketch'. From this 'real sketch' a refined sketch is automatically formed with the use of 'Correlation functions' and 'curve fitting' algorithms.

The project was inspired by a recent research at MIT CSAIL Labs: Assist. The design and implementation of both hardware and software gave me a real insight into imaging systems and image processing niceties. (

pdf
)

 

Senior Thesis

 

Worked on "Design and Implementation of Simultaneous Compression and Encryption of signals" (applied to JPEG image  compression). 



2-D Hough Transform Generalization in Image Processing

 

Generalization of the Hough Transform to generalize the detection procedure for detection of ellipses and similar shapes with curvature. The bottomline of the work was the use of Family of Ellipses for representing all possible ellipses that satisfy certain conditions in a given image. The gray scale levels were used with threshold values to determine the family of curves first. The decision parameters for deciding the threshold levels were identified and  used for methodically detecting the shapes in the image.

 

Summer Internship -2007 at Digital Systems, Pune

 

Design of Microcontroller based CO2 insufflator and Lux meter. A closed loop feedback system used for controlling the air levels in the patient body during Laparoscopy.A PIC based closed loop feedback was used to regulate the flow through venturimeter.The Body pressure as well as air flow rate values were calculated and regulated.

 

International Publications- Past Research :

 

"A Provably Secure Message Transfer  System Using  Euler's Totient Function"

Rohit Pandharkar, M. A. Joshi, Nitin Narappanawar

IADIS I MCCIS International Conference 2007, Lisbon, Portugal. (pdf)

[Honorable Mention for being youngest person at the Conference- 19yrs]

Paper: IADIS Digital

Library
 link
 


"A New Method for generation of common keys using Transcendental functions and Generalization of Diffie Hellman Protocol",

Rohit Pandharkar, M. A. Joshi

IEEE Tencon International Conference 2008, Hyderabad India.(pdf)

Paper: IEEE Digital Library link 

 

"Statistical Analysis and Findings of the Use of GPRS Mobile Services in India"

Rohit Pandharkar, M. A. Joshi

IET-UK WMMN International Conference 2008, Mumbai, India. (pdf)

Paper: IEEE Digital Library Link 


"A New Public Key Cryptosystem based on Linear Diophantine Equations and De Moivre's Theorem"

Rohit Pandharkar, M. A. Joshi, Nitin Narappanawar

International AACC, 2007. (pdf)