Room ECED-1 : 206
Office Phone 0495-2286726
Areas Of Interest Image & Video Processing, Biomedical Signal Processing

Ph. D (Image Coding):  National Institute of Technology Calicut, 2009

M.Tech (Digital Electronics): Cochin University of Science and Technology, Kochi, 2000

B.Tech (Electronics and Communication Engineering): College of Engineering, Trivandrum, 1997


International Journals

  1. Unnikrishnan, S., G, S., “Performance analysis of memory data layout for sub-block data access”, Multimedia Tools and Applications (2022),  Springer Publications, Impact Factor: 2.577
  2. Supriya Unnikrishnan, G. Sreelekha, “Performance analysis of memory data layout for sub-block data access”, Supriya Unnikrishnan, G. Sreelekha, "Highly parallel Vector Radix FFT for high throughput video applications", IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 67, No. 10, pp. 2114-2118, October 2020. Impact Factor: 3.292.
  3. Unnikrishnan  Supriya,  G. Sreelekha,  "Video stabilization performance enhancement for low-texture videos.", Journal of Real-Time Image Processing, 17, 1135–1152 (2020)., Springer-Verlag, Impact Factor: 2.137
  4. Arun Varghese, G. Sreelekha, “An efficient algorithm for detection of vacant spaces in delimited and non-delimited parking lots”, IEEE Transactions on Intelligent Transportation Systems, Vol, 21, DOI: 10.1109/TITS.2019.2934574, August 2019. Impact Factor: 6.492
  5. K.L. Nisha, Sreelekha G., P.S. Sathidevi, Poornima Mohanachandran, Anand Vinekar  , " A computer-aided diagnosis system for plus disease in retinopathy of prematurity with structure adaptive segmentation and vessel based features  ", Computerized Medical Imaging and Graphics, Elsevier Publications, Volume 74, pp 72-94, June 2019. Impact Factor: 4.79
  6. Abhilash Antony, Sreelekha G, "Selective intra prediction in HEVC planar and angular modes for efficient near-lossless video compression", Multimedia Tools and Applications, Springer Publications, Volume 77, Issue 1, pp 1093–1113, January 2018. Impact Factor: 2.517
  7. Varghese and G, Sample-based integrated background subtraction and shadow detection, “IPSJ Transactions on Computer Vision and Applications”, Vol.9, Springer Publications, DOI 10.1186/s41074-017-0036-1, December 2017, Impact Factor: 4.346
  8. Abhilash Antony, Sreelekha G, “Performance enhancement of HEVC lossless mode using sample-based angular and planar predictions”, Signal, Image and Video Processing, Springer Publications, Volume 11, Issue 6, pp 1057–1064, September 2017. Impact Factor: 2.157
  9. Abhilash Antony, Sreelekha G, “HEVC –based Lossless intra coding for efficient still image compression”, Multimedia Tools and Applications, Springer Publications, Vol. 76 No. 2, pp.1639–1658, 15 January 2017. Impact Factor: 2.517.
  10. Abhilash A., Sreelekha,G., “Highly efficient near lossless video compression using selective intra prediction for HEVC lossless mode”, AEUE - International Journal of Electronics and Communications, Elsevier Publications, Volume 69, Issue 11, Pages 1650–1658, November 2015. Impact Factor: 3.183
  11. G. Sreelekha & P. S. Sathidevi, “An HVS based adaptive quantization scheme for the compression of color images”, Digital Signal Processing, Elsevier Publications, Volume 20, Issue 4, pp.1129-1149, July 2010. Impact Factor: 3.381
  12. G. Sreelekha & P. S. Sathidevi, “ A Wavelet-Based Perceptual Image Coder Incorporating A New Model For Compression Of Color Images”, Int. J. of Wavelets, Multiresolution and Information Processing,  World Scientific Publishing Company, Vol. 7, No. 5, pp. 675–692, 2009. . Impact Factor: 1.408


Conference Publications

  1. Aruna K A, Vrinda S Anil, Anju Anand, Anagha Jaysankar, Anjali Venugopal, K L Nisha, G Sreelekha, "Image Mosaicing for Neonatal Fundus Images," 2021 IEEEC 8th International Conference on Smart Computing and Communications (ICSCC), July 2021, pp. 100-105, India. doi: 10.1109/ICSCC51209.2021.9528163.
  2. Pavan Kumar G and Sreelekha G, “Fast SCC in HEVC using a Palette Mode Decision Tree Classifier”, International Conference on Communication and Signal Processing (ICCSP), IEEE 2020, July 28 - 30, 2020, India. pp.1356-1360.
  3. M. Amrutha, K.L. Nisha, G. Sreelekha, P.S. Sathidevi, P. Mohanachandran and A. Vinekar,"An Efficient Ridge Detection Method for Retinopathy of Prematurity Severity Analysis", 2020 4th International Conference on Intelligent Computing and Control Systems (ICICCS), IEEE, 2020, pp.1210–1215, May 2020.
  4. K L Nisha, Sreelekha G, P S Sathidevi, Poornima Mohanachandran, Anand Vinekar, “ A Robust Algorithm for Automated Detection of Optic Disc in Retina of Premature Infants”, 2019 IEEE Region 10 Conference TENCON, December 2019, Kochi, Kerala.
  5. Ahammed Sabir K A, Charls Babu, Ranjith V R, Unnikrishnan M, Supriya Unnikrishnan, Dhanaraj K J, Sreelekha G, “FFT Architecture for Motion Estimation Using Phase Correlation”, 2019 IEEE Region 10 Conference TENCON 2019, Kochi, Kerala.
  6. Musarath, T., Unnikrishnan K. Supriya, G. Sreelekha. "Sub-Block Based Global Motion Estimation for Affine Motion Model." In 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI), pp. 665-670.
  7. K.L.Nisha, Sreelekha G, Sathidevi Puthumangalathu Savithri, Poornima Mohanachandran, Anand Vinekar, “Fusion of Structure Adaptive Filtering and Mathematical Morphology for Vessel Segmentation in Fundus Images of Infants with Retinopathy of Prematurity”, 2017 IEEE 30th Canadian Conference on Electrical and Computer Engineering (CCECE), 30 April - 3 May 2017, Canada
  8. Sini Simon, G. Sreelekha “Performance improvement in SHVC using contrast  sensitivity function”, Proceesings of the 2016 IEEE Region 10 Conference (TENCON), November 2016, Marina Bay Sands, Singapore.
  9. Sini Simon, Abhilash Antony, G. Sreelekha, “Performance improvement in HEVC using contrast  sensitivity function”, 2016 International Conference on Advances in Computing, Communications and Informatics (ICCACI 2016), 21-24 September 2016, Jaipur , India
  10. Saran K. B., Sreelekha G., “Traffic Video Surveillance: Vehicle Detection and Classification”, 2015 International Conference on Control, Communication & Computing India (ICCC), 19-21 November 2015, Trivandrum.
  11. Arun Varghese, Sreelekha G, “Background Subtraction with Outlier Replacement”, Proceedings of the 3rd IEEE International Conference on Recent Advances in Intelligent Computational Systems, (RAICS 2015), pp. 251-255, December 10-12, 2015 Trivandrum, Kerala, India.
  12. Arun Varghese, Sreelekha G, “Short term-Long term dual model Background subtractor”, Proceedings of the 2015 IEEE International Conference on Computer and Communications (ICCCT 2015), pp. 251-255, 25-27 September 2015, MNNIT, Allahabad, India.
  13. Arun Varghese, Sreelekha G, “’Background subtraction for Vehicle Detection”, IEEE Global Conference on Communication Technologies, Noorul Islam Uty, Nagercoil, April 2015.
  14. Merlin Paul, Abhilash Antony and Sreelekha G,“ Performance Improvement of HEVC Using Adaptive Quantization ,” IEEE Conference Publications , International Conference on Advances in Computing, Communication & Informatics (ICACCI 2014), GCET, Greater Noida , pp 1428-1433.
  15. Merlin Paul, Abhilash Antony and Sreelekha G,“ HVS Dependent Perceptual Quantization for HEVC ,” Conference Proceedings (Elsevier), International Conference on Signal & Speech Processing (ICSSP) Kollam, pp 287-292 (2014).
  16. Kolla R. K, Sreelekha G., “A perceptual adaptive quantizer for quality improvement of HEVC”, 7th IEEE International Conference on Industrial and Information Systems (ICIIS), DOI: 10.1109/ICIInfS.2012.6304782, pp. 1-6, August 2012, IIT Madras, Chennai, India.
  17. Arun B. Aloshious,  Sreelekha G., “Quality improvement of H.264/AVC FRExt by incorporating perceptual models”,  2011 Annual IEEE India Conference (INDICON),  DOI: 10.1109/INDCON.2011.6139483, pp. 1 – 6, 16-19 December 2011, BITS Pilani, Hyderabad, India.
  18. Koparde G. Prashant, G. Sreelekha, “A Complete Wavelet Based Perceptual Video Coder ”, Proceedings of the IASTED International Conference on Signal and Image Processing and Applications (SIPA 2011) June 22 - 24, 2011 Crete, Greece.
  19. G. Sreelekha, Koparde Prashant G., “A Perceptual Video Coder Incorporating Wavelet Based Intra Frame Coder”, Proceedings of the 2010 IEEE International Conference on Computer and Communications (ICCCT 2010), pp. 188 - 193, 17-19 September 2010, MNNIT, Allahabad, India.
  20. V. G. Ashamol, G. Sreelekha, P. S. Sathidevi, “Diffusion-Based Image Denoising Combining Curvelet and Wavelet”, Proceedings of the 15th International Conference on Systems, Signals & Image Processing (IWSSIP 08), pp. 169-172, 25-28 June 2008, Slovak Republic.
  21. Sreelekha G. and P. S. Sathidevi, “A New Wavelet Based Compression Scheme Replicating Human Visual System Processing”, International Conference on  Computational Intelligence and Multimedia Applications - 2007 (ICCIMA 07), Vol 3, pp. 41-46, 13-15 December, 2007, Mepco Schlenk Engineering College, Sivakasi, Tamilnadu, India.
  22. Sreelekha G. and P. S. Satidevi, “An Improved JPEG Compression Scheme Using Human Visual System Model”, Proceedings of 2007 14th International Workshop on Systems, Signals & Image Processing (IWSSIP) & 6th EUARASIP Conference Focused on Speech & Image processing, Multimedia Communication & Services (EC-SIPMCS), pp. 103-106, June, 2007, Slovenia.
  23. Deepthi.P.P, Celine Mary Stuart, Sreelekha G. and P.S. Sathidevi, “Compression Tolerant DCT Based Perceptual Image Hash Incorporating Human Visual System Model”, Proceedings of IEEE International Conference on Signal & Image Processing, Vol.II,  pp. 662-665, 7-9 December, 2006, India.1.


1. Digital Image Processing Techniques (PG)

2. Signal Compression - Theory and Methods (PG)

3. Digital Image Processing (UG)

4.  Digital Signal Processing (UG)

5. Signal and Syatems (UG)


Life Member - Indian Society for Technical Education (ISTE)

IEEE Senior Member 

1. Ph D Coordinator ECE

2. Ph D Admission in charge ECE

3. NBA Coordinator ECE

4. Academic Quality Monitoring Committee Member