NITMLOGO

NIT Meghalaya

COMPUTER SCIENCE AND ENGINEERING Department

Profile:

Dr. Sanjoy Pratihar

Assistant Professor

Ph.D., Indian Institute of Technology Kharagpur, India

M.E., Bengal Engg. & Science University, Shibpur, India

E-mail: sanjoy.pratihar@gmail.com

Tel:

 

 

Research Interest

  • Digital Geometry
  • Computer Vision
  • Low-level Image Processing
  • Document Image Processing

Educational Qualifications

  • Ph.D. from Indian Institute of Technology Kharagpur in 2015
  • M.E. from Bengal Engg. & Science University, Shibpur in 2007

Publications

International Journals:

  • S. Pratihar and P. Bhowmick, On Farey Sequence and its Augmentation for Applications to Image Analysis, International Journal of Applied Mathematics and Computer Science (AMCS), Vol.-(accepted), 2017. https://www.amcs.uz.zgora.pl/
  • S. Pratihar and P. Bhowmick, Fast and Direct Polygonization for Gray-Scale Images Using Digital Straightness and Exponential Averaging, International Journal of Image and Graphics, Vol.-16, Issue No.-2, Page Nos -1650007 (36 pages), 2016. http://www.worldscientific.com/doi/abs/10.1142/S0219467816500078
  • B. Paria, S. Pratihar, and P. Bhowmick, On Farey Table and its Compression for Space Optimization with Guaranteed Error Bounds, Mathematics for Applications (published by the Institute of Mathematics, Brno University of Technology, Czech Republic), Vol.-5, Issue No.-2, Page Nos -123 - 145, 2016. http://ma.fme.vutbr.cz/5_2.html
  • S. Pratihar, P. Bhowmick, S. Sural, and J. Mukhopadhyay, Skew Correction of Document Images by Rank Analysis in Farey Sequence, International Journal of Pattern Recognition and Artificial Intelligence, Vol.-27, Issue No.-7, Page Nos -1353004 (35 pages), 2013. http://www.worldscientific.com/doi/abs/10.1142/S0218001413530042?af=R&


International Conferences:

  • M. Ajij and S. Pratihar, Quasi-straightness based Features for Off-line Verification of Signatures, International Conference on Identity, Security and Behavior Analysis (ISBA), Period -February 22-24, Place -New Delhi, 2017. http://ieee-biometrics.org/isba2017/accepted.html
  • M. Ajij, S. Pratihar, K. Ganguly, Detection and Retargeting of Emphasized Text for Content Summarization, 5th Intl. Conf. on Advances in Computing, Communications and Informatics (ICACCI), Period -21-24 September, Place -LNMIIT, Jaipur, Page -15-21, 2016.
  • S. Pratihar, N. Begum, Understanding Shape Context by Analysis of Farey Ranks, 5th Intl. Conf. on Informatics, Electronics & Vision, Period -13-14 May, Place -The University of Dhaka, Dhaka, Page -(to be published), 2016.
  • S. Pratihar, P. Bhowmick, S. Sural, and J. Mukhopadhyay, Detection and Removal of Hand-drawn Underlines in a Document Image using Approximate Digital Straightness, Workshop on Document Analysis and Recognition (workshop with ICVGIP 2012), Period -16-19 December, Place -IIT Bombay, Page -124-131, 2012. http://dl.acm.org/citation.cfm?id=2432576
  • S. Pratihar, P. Bhowmick, Skew Correction of Engineering Drawings by Digital-geometric Analysis of Farey Ranks, Intl. Conf. on Image and Information Processing, Period -3-5 November, Place -Jaypee University of Information Technology, Shimla, Page -1-6, 2011. http://ieeexplore.ieee.org/document/6108948/
  • S. Pratihar, P. Bhowmick, Vectorization of Thick Digital Lines Using Farey Sequence and Geometric Refinement, The 7th Indian Conf. on Computer Vision, Graphics and Image Processing (ICVGIP), Period -12-15 December, Place -IIT Madras, Chennai, Page -518-525, 2010. http://dl.acm.org/citation.cfm?id=1924629
  • S. Pratihar, P. Bhowmick, Shape Decomposition Using Farey Sequence and Saddle Points, The 7th Indian Conf. on Computer Vision, Graphics and Image Processing (ICVGIP), Period -12-15 December, Place -IIT Madras, Chennai, Page -77-84, 2010. http://dl.acm.org/citation.cfm?id=1924570
  • S. Pratihar, S. Pal, P. Bhowmick, A. Biswas, and B. B. Bhattacharya, Recognition of Hand-drawn Graphs Using Digital-geometric Techniques, 12th International Conference on Frontiers in Handwriting Recognition, 12th Intl. Conf. on Frontiers in Handwriting Recognition (ICFHR), Period -16-18 November, Place -ISI Kolkata, Kolkata, Page -89-94, 2010. http://ieeexplore.ieee.org/document/5693505/
  • S. Das, K. Halder, S. Pratihar, and P. Bhowmick, Properties of Farey Sequence and their Applications to Digital Image Processing, 4th Intl. Conf. on Information Processing, Period -6-8 August, Place -Bangalore University, Bangalore, Page -71-81, 2010. https://arxiv.org/abs/1509.07757
  • S. Pratihar, P. Bhowmick, A Thinning-free Algorithm for Straight Edge Detection in a Gray-scale Image, 7th Intl. Conf. on Advances in Pattern Recognition (ICAPR), Period -4-6 February, Place -ISI Kolkata, Kolkata, Page -341-344, 2009. http://ieeexplore.ieee.org/abstract/document/4782805/


National Conferences:



Books:

Sl No. Author Name Title Publisher ISBN No Pages Year
1 S. Pratihar, P. Bhowmick On Applying the Farey Sequence for Shape Representation in Z^2 (Chapter - 9) IGI Global, USA 1466609540 172 - 190 2012

Courses Taught

Previous/Other Semester/Year
  • Computer Graphics, Autumn Semester, 2014
  • Theory of Computation, Spring Semester, 2015
  • Principles of Programming Languages, Spring Semester, 2015
  • Computer Graphics, Autumn Semester, 2015
  • Computer Programming, Autumn Semester, 2015
  • Theory of Computation, Spring Semester, 2016
  • Computational Geometry, Spring Semester, 2016

Students Supervised/Supervising

  • Ph.D
  • Md. Ajij, Ph.D, Digital straightness as a tool in machine vision applications (ongoing), 2016
  • M.Tech
  • Tonmoya Sarmah, M.Tech, Polygonal approximation of discontinuous digital curves, 2015-2016
  • Najima Begum, M.Tech, Understanding shape context from selective points on the contour, 2015 - 2016
  • Saumitra Gangwar, M.Tech, Designing parallel algorithm for detection of straight edges in gray-scale image (ongoing), 2016-2017
  • B.Tech
  • Vikash Kumar Swami, B.Tech, Localization of text in scene images, 2015-2016
  • Manish Tiwari, B.Tech, Localization of text in scene images, 2015-2016
  • S. Dkhar, B.Tech, De-warping of hand-held camera captured document images (ongoing), 2016-2017
  • W. Pale, B.Tech, De-warping of hand-held camera captured document images (ongoing), 2016-2017
  • Naresh O., B.Tech, Detection of built-up areas in aerial images (ongoing), 2016-2017

Conference/Symposium/Workshop/Seminar Organised

Workshop:

Sl No. Title Sponsors National/International Duration Role Played
1 Workshop on NMEICT Awareness MHRD, GoI National September 25-26, 2015



Additional Responsibility

  • Policy/decision making on library related issues, Member, Library Committee, from February 2015 - till date
  • Examination related, Member, Examination Committee, from August 2015 - till date
  • Institute ranking scheme -- related work, Member, Institute Ranking Committee, from 2015-16

Conference/Workshop/Seminar Attended

Conference:

Sl No. Name Period Place National|International
1 International Conference on Identity, Security and Behavior Analysis (ISBA 2017) 22-24 February, 2017 India Habitat Centre, New Delhi International
2 Internatioal Conference on Informatics, Electronics and Vision (ICIEV) 13-14 May, 2016 The University of Dhaka, Dhaka International
3 National Conference on Computer Vision, Pattern Recognition, Image Processing and Graphics (NCVPRIPG-2013) 18-21 December, 2013 IIT Jodhpur, Jodhpur National
4 International Conference on Information Processing (ICIP) 5-8 August, 2010 Bangalore University, Bangalore International
5 The Twelfth International Conference on Frontiers of Handwriting Recognition (ICFHR-2010) 16-18 November, 2010 ISI Kolkata, Kolkata International
6 Workshop DAR with The Eighth Indian Conference on Vision, Graphics and Image Processing (ICVGIP-2012) 16-19 December, 2012 IIT Bombay, Mumbai International
7 Seventh International Conference on Advancement in Pattern Recognition (ICAPR-2009) 4-6 February, 2009 ISI Kolkata, Kolkata International



Professional Membership

Sl No. Name Member ID Category Validity
1 The International Association for Pattern Recognition (IAPR) - TC 18 (Discrete Geometry and Mathematical Morphology) - Member -

Awards & Recognition

Sl No. Award Details Year
1 Best paper (runner-up) award for the work "Quasi-straightness based Features for Off-line Verification of Signatures" at ISBA - 2017. ISBA-2017 Link 2017

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