Subhadeep Koley (শুভদীপ)

I am a final-year Doctor of Philosophy (PhD) candidate, focusing on Computer Vision and Deep Learning, at SketchX Lab of Centre for Vision, Speech and Signal Processing (CVSSP), University of Surrey, England, United Kingdom. My primary supervisor is Prof. Yi-Zhe Song ; co-supervised by Prof. Tao (Tony) Xiang .

Prior to this, I worked as a Computer Vision Engineer at The MathWorks, specializing in Digital Image Processing, Pattern Recognition, Multi & Hyperspectral imaging, Deep Learning, and Medical Image Analysis.

Prior to that, I worked as a Graduate Engineer at Johnson Controls .

Top-venue Conference publications (Feb 2025): 16 x CVPR, 1 x ICCV, 2 x ECCV.

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Research Interests

My research focus is broadly centred around Deep Learning and its applications in Computer Vision problems. My specific area of interest is deep learning-based visual understanding of hand-drawn sketches. Our research group aims at understanding "how seeing can be explained by drawing".

Recent Updates

  • New! [Feb 2025:] Two papers in CVPR 2025.
  • [Jul 2024:] Two papers in ECCV 2024.
  • [Feb 2024:] Six papers in CVPR 2024.
  • [Jul 2023:] One paper in ICCV 2023.
  • [Mar 2023:] Our paper "What Can Human Sketches Do for Object Detection?" is selected among top-12 award candidates in CVPR 2023.
  • [Feb 2023:] Six papers in CVPR 2023.
  • [Jan 2023:] One paper in Pattern Analysis and Applications (IF - 3.9), Springer.
  • [Feb 2022:] Two papers in CVPR 2022.

    • Selected Publications

    2025

    SketchFusion: Learning Universal Sketch Features through Fusing Foundation Models New!
    S. Koley, TK. Dutta, A. Sain, PN. Chowdhury, AK. Bhunia, Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2025
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video] / [Code]

    Sketch Down the FLOPs: Towards Efficient Networks for Human Sketch New!
    A. Sain, S. Maity,, PN. Chowdhury, S. Koley, AK. Bhunia, Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2025
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]

    2024

    Freeview Sketching: View-Aware Fine-Grained Sketch-Based Image Retrieval
    A. Sain, PN. Chowdhury, S. Koley, AK. Bhunia, Y-Z. Song
    In Proc. European Conference on Computer Vision ( ECCV ), 2024
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]
    Do Generalised Classifiers really work on Human Drawn Sketches?
    H. Bandopadhyay, PN. Chowdhury, A. Sain, S. Koley, T. Xiang, AK. Bhunia, Y-Z. Song
    In Proc. European Conference on Computer Vision ( ECCV ), 2024
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]
    It's All About Your Sketch: Democratising Sketch Control in Diffusion Models
    S. Koley, AK. Bhunia, D. Sekhri, A. Sain, PN. Chowdhury, T. Xiang , Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2024
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]
    You'll Never Walk Alone: A Sketch and Text Duet for Fine-Grained Image Retrieval
    S. Koley, AK. Bhunia, A. Sain, PN. Chowdhury, T. Xiang , Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2024
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]
    Text-to-Image Diffusion Models are Great Sketch-Photo Matchmakers
    S. Koley, AK. Bhunia, A. Sain, PN. Chowdhury, T. Xiang , Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2024
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]
    How to Handle Sketch-Abstraction in Sketch-Based Image Retrieval?
    S. Koley, AK. Bhunia, A. Sain, PN. Chowdhury, T. Xiang , Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2024
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]
    In the Media - [Linnk.ai]

    DemoCaricature: Democratising Caricature Generation with a Rough Sketch
    D-Y. Chen, AK. Bhunia, S. Koley, A. Sain, PN. Chowdhury, Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2024
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]

    Doodle Your 3D: From Abstract Freehand Sketches to Precise 3D Shapes
    H. Bandyopadhyay, S. Koley, A. Das, AK. Bhunia, A. Sain, PN. Chowdhury, T. Xiang , Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2024
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]
    In the Media - [NoFilmSchool]

    2023

    Democratising 2D Sketch to 3D Shape Retrieval Through Pivoting
    PN. Chowdhury, AK. Bhunia, A. Sain, S. Koley, T. Xiang , Y-Z. Song
    In Proc. IEEE International Conference on Computer Vision ( ICCV ), 2023
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]

    Picture that Sketch: Photorealistic Image Generation from Abstract Sketches
    S. Koley, AK. Bhunia, A. Sain, PN. Chowdhury, T. Xiang , Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2023
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]
    In the Media - [Market Tech Post]

    Sketch2Saliency: Learning to Detect Salient Objects from Human Drawings
    AK. Bhunia, S. Koley, A Kumar, A. Sain, PN. Chowdhury, T. Xiang , Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2023
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]

    Exploiting Unlabelled Photos for Stronger Fine-Grained SBIR
    A. Sain, AK. Bhunia, , S. Koley, PN. Chowdhury, T. Xiang , Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2023
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]

    What Can Human Sketches Do for Object Detection?
    PN. Chowdhury, AK. Bhunia, A. Sain, S. Koley, T. Xiang , Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2023
    [Nominated as a paper award candidate!]
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]
    In the Media - [India Gov AI] / [Tech Xplore] / [Science Daily] / [Mirage News] / [Market Tech Post] / [HospiMedica]

    CLIP for All Things Zero-Shot Sketch-Based Image Retrieval, Fine-Grained or Not
    A. Sain, AK. Bhunia, PN. Chowdhury, S. Koley, T. Xiang , Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2023
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]

    SceneTrilogy: On Human Scene-Sketch and its Complementarity with Photo and Text
    PN. Chowdhury, AK. Bhunia, A. Sain, S. Koley, T. Xiang , Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2023
    [PDF] / [BibTeX] / [arXiv] / [Project Page] / [Video]

    Cross-Modal Face Recognition with Illumination-Invariant Local Discrete Cosine Transform Binary Pattern (LDCTBP)
    S. Koley, H. Roy, S.Dhar, D. Bhattacharjee
    Pattern Analysis and Applications, Springer
    [PDF] / [BibTeX]

    2022

    Doodle It Yourself: Class Incremental Learning by Drawing a Few Sketches
    AK. Bhunia , VR. Gajjala, S. Koley, R. Kundu, A. Sain, T. Xiang , Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2022
    [PDF] / [BibTeX] / [Video] / [Code]
    In the Media - [Market Tech Post]

    Sketching without Worrying: Noise-Tolerant Sketch-Based Image Retrieval
    AK. Bhunia , S. Koley, AFUR. Khilji , A. Sain, PN. Chowdhury, T. Xiang, Y-Z. Song
    In Proc. IEEE Conference on Computer Vision and Pattern Recognition ( CVPR ), 2022
    [PDF] / [BibTeX] / [Video] / [Code]

    Bat optimized 3D anaglyph image watermarking based on maximum noise fraction in the digital Shearlet domain
    S. Koley
    Multimedia Tools and Applications, vol. 81, pp. 19491–19523, Springer
    [PDF] / [BibTeX]

    2021

    Illumination invariant face recognition using Fused Cross Lattice Pattern of Phase Congruency (FCLPPC)
    S. Koley, H. Roy, S.Dhar, D. Bhattacharjee
    Information Sciences, vol. 584, pp. 633 - 648, Elsevier
    [PDF] / [BibTeX]

    Gammadion Binary Pattern of Shearlet Coefficients (GBPSC): An illumination-invariant heterogeneous face descriptor
    S. Koley, H. Roy, D. Bhattacharjee
    Pattern Recognition Letters, vol. 145, pp. 30 - 36, Elsevier
    [PDF] / [Code] / [BibTeX]

    Local–Friis–Radiation–Pattern (LFRP) for Face Recognition
    H. Roy, S. Koley
    Sensing and Imaging, vol. 22, no. 1, pp. 1 - 35, Springer
    [PDF] / [Code] / [BibTeX]

    A wavelet based low frequency prior for single image dehazing
    S. Koley, H. Roy, S. Dhar
    Recent Trends in Computational Intelligence Enabled Research, 1st Edn., pp. 245 - 261, Elsevier
    [PDF] / [BibTeX]

    On Mitigation of False Positive Problem in Singular Value Decomposition based Digital Image Watermarking
    S. Koley
    Lecture Notes on Data Engineering and Communications Technologies, pp. 299 - 312, Springer
    [PDF] / [BibTeX]

    2020

    Edge Detection based on Local–Friis–Radiation–Magnitude–Ratio (LFRMR)
    S. Koley, H. Roy, S. Dhar, D. Bhattacharjee
    In Proc. 5th ICRCICN 2020, Banglore, India, pp. 99 - 104, IEEE
    [PDF] / [BibTeX]

    Visual attention model based dual watermarking for simultaneous image copyright protection and authentication
    S. Koley
    Multimedia Tools and Applications, vol. 80, pp. 6755 - 6783, Springer
    [PDF] / [BibTeX]

    Hardware Implementation of a Fast 3D Anaglyph Image Watermarking Framework for Integration in Consumer Electronics Devices
    S. Koley
    In Proc. 5th ZINC 2020, Novi Sad, Serbia, pp. 40 - 45, IEEE
    [PDF] / [BibTeX]

    2019

    A Wavelet-Based Blind Digital Image Watermarking using Dynamic LSB Replacement (DLSBR) and Symmetric Key Cryptography
    A. Ghosh, S. Koley, S. Bhattacharya
    Advances in Intelligent Systems and Computing, vol. 922, pp. 103 - 111, Springer
    [PDF] / [BibTeX]

    A feature adaptive image watermarking framework based on Phase Congruency and Symmetric Key Cryptography
    S. Koley
    Journal of King Saud University Computer and Information Sciences, vol. 34, no. 3, pp. 636 - 645, Elsevier
    [PDF] / [BibTeX]

    Implementation of a Feature Adaptive Colour Image Copyright Protection Scheme
    S. Koley, M. R. Nayak, S. N. Bal, S. K. Sarkar
    Lecture Notes In Electrical Engineering, vol. 537, pp. 201 - 211, Springer
    [PDF] / [BibTeX]

    2018

    Single Image Visibility Restoration using Dark Channel Prior and Fuzzy Logic
    S. Koley, A. Sadhu, H. Roy, S. Dhar
    In Proc. 2nd IEMENTech 2018, Kolkata, India, pp. 1 - 7, IEEE
    [PDF] / [Code] / [BibTeX]



    Professional & Voluntary work

  • Serving as a reviewer for:
  • Serving as a reviewer for CVPR, ICCV, ECCV, BMVC since 2022.

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    Chekout my reading list (non-academic) at GoodReads

    Copyright: CC BY-NC-SA 4.0 © Subhadeep Koley | Last updated: 22 Mar 2025 | Good artists copy, great artists steal.