Research

My doctoral work, at the Chair of Pattern Recognition at FAU Erlangen-Nürnberg, asked what happens to computer vision when you point it at images that were never photographs. The dissertation — Concepts to Computational Constructs: Advanced Scene Understanding for Heterogeneous Artworks Using Deep Learning — worked across art history, classical archaeology, and Christian archaeology, where the objects of study are paintings, vase decorations, and iconographic programmes rather than camera output.

That distinction is not cosmetic. Detection and pose estimation models inherit their priors from photographic data, so they fail on artwork in ways that are specific and instructive: a figure on an ancient vase is rendered by convention, not by projection. Labels are scarce, because producing them requires an art historian. And an art historian has no use for a prediction they cannot interrogate.

Those constraints shaped the work — pose estimation on vase paintings through perceptually-grounded style transfer, one-shot detection for heterogeneous artwork collections, and ICC and ICC++, which learn image composition as an explainable feature. The point of the latter was to recover the compositional structures art historians already reason about, in a form that lets them check the machine's reasoning against their own.

I was also part of the computer vision team on Odeuropa, a European research project on olfactory heritage, where the vision problem was to find references to smell in historical images — the objects that carry scent, and the people caught in the act of smelling. That work produced the ODOR dataset for olfactory object detection, SniffyArt for smelling persons, and the ODOR challenge at ICPR 2022. The targets are small, densely packed, and scattered across the frame, which makes olfactory reference detection a genuinely hard detection problem quite apart from its interest to historians.

A separate thread runs through medical imaging: quantifying pulmonary hemosiderophages in cytology slides, and a series of mammography papers on breast density, luminal subtype, calcification, and abnormality classification in contrast-enhanced spectral mammography. The methods there are transfer learning and augmentation — attention-guided erasing, random histogram equalization, and a neighbourhood representation loss.

Publications

For the full list of academic publications, check out my official-webpage, Google Scholar profile.

2025

Attention-guided erasing for enhanced transfer learning in breast abnormality classification

Published in International Journal of Computer Assisted Radiology and Surgery, 2025

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Recommended citation: AB Panambur, S Bhat, H Yu, P Madhu, S Bayer, A Maier. (2025). "Attention-guided erasing for enhanced transfer learning in breast abnormality classification." International Journal of Computer Assisted Radiology and Surgery. https://scholar.google.com/citations?view_op=view_citation&hl=en&user=tEe1-TYAAAAJ&citation_for_view=tEe1-TYAAAAJ:Zph67rFs4hoC

2024

Smelly, dense, and spreaded: The Object Detection for Olfactory References (ODOR) dataset

Published in Expert Systems with Applications 255, 124576, 2024

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Recommended citation: M Zinnen, P Madhu, I Leemans, P Bell, A Hussian, H Tran, A Hürriyetoğlu, .... (2024). "Smelly, dense, and spreaded: The Object Detection for Olfactory References (ODOR) dataset." Expert Systems with Applications 255, 124576. https://scholar.google.com/citations?view_op=view_citation&hl=en&user=tEe1-TYAAAAJ&citation_for_view=tEe1-TYAAAAJ:KlAtU1dfN6UC

Enhancing downstream classification of breast abnormalities in contrast enhanced spectral mammography using a neighborhood representation loss

Published in Medical Imaging 2024: Computer-Aided Diagnosis 12927, 77-84, 2024

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Recommended citation: AB Panambur, P Madhu, S Bayer, A Maier. (2024). "Enhancing downstream classification of breast abnormalities in contrast enhanced spectral mammography using a neighborhood representation loss." Medical Imaging 2024: Computer-Aided Diagnosis 12927, 77-84. https://scholar.google.com/citations?view_op=view_citation&hl=en&user=tEe1-TYAAAAJ&citation_for_view=tEe1-TYAAAAJ:ULOm3_A8WrAC

Attention-guided Erasing: Novel Augmentation Method for Enhancing Downstream Breast Density Classification

Published in International Journal of Computer Assisted Radiology and Surgery, 2024

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Recommended citation: AB Panambur, H Yu, S Bhat, P Madhu, S Bayer, A Maier. (2024). "Attention-guided Erasing: Novel Augmentation Method for Enhancing Downstream Breast Density Classification." International Journal of Computer Assisted Radiology and Surgery. https://scholar.google.com/citations?view_op=view_citation&hl=en&user=tEe1-TYAAAAJ&citation_for_view=tEe1-TYAAAAJ:kNdYIx-mwKoC

2023

SniffyArt: The Dataset of Smelling Persons

Published in Proceedings of the 5th Workshop on analySis, Understanding and proMotion of  …, 2023

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Recommended citation: M Zinnen, A Hussian, H Tran, P Madhu, A Maier, V Christlein. (2023). "SniffyArt: The Dataset of Smelling Persons." Proceedings of the 5th Workshop on analySis, Understanding and proMotion of  …. https://scholar.google.com/citations?view_op=view_citation&hl=en&user=tEe1-TYAAAAJ&citation_for_view=tEe1-TYAAAAJ:MXK_kJrjxJIC

Concepts to Computational Constructs: Advanced Scene Understanding for Heterogeneous Artworks Using Deep Learning

Published in Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2023

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Recommended citation: P Madhu. (2023). "Concepts to Computational Constructs: Advanced Scene Understanding for Heterogeneous Artworks Using Deep Learning." Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU). https://scholar.google.com/citations?view_op=view_citation&hl=en&user=tEe1-TYAAAAJ&cstart=20&pagesize=80&citation_for_view=tEe1-TYAAAAJ:8k81kl-MbHgC

2022

One-Shot Object Detection in Heterogeneous Artwork Datasets

Published in 2022 Eleventh International Conference on Image Processing Theory, Tools and  …, 2022

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Recommended citation: P Madhu, A Meyer, M Zinnen, L Mührenberg, D Suckow, T Bendschus, .... (2022). "One-Shot Object Detection in Heterogeneous Artwork Datasets." 2022 Eleventh International Conference on Image Processing Theory, Tools and  …. https://scholar.google.com/citations?view_op=view_citation&hl=en&user=tEe1-TYAAAAJ&citation_for_view=tEe1-TYAAAAJ:ufrVoPGSRksC

ODOR: The ICPR2022 ODeuropa Challenge on Olfactory Object Recognition

Published in 2022 26th International Conference on Pattern Recognition (ICPR), 4989-4994, 2022

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Recommended citation: M Zinnen, P Madhu, R Kosti, P Bell, A Maier, V Christlein. (2022). "ODOR: The ICPR2022 ODeuropa Challenge on Olfactory Object Recognition." 2022 26th International Conference on Pattern Recognition (ICPR), 4989-4994. https://scholar.google.com/citations?view_op=view_citation&hl=en&user=tEe1-TYAAAAJ&citation_for_view=tEe1-TYAAAAJ:UebtZRa9Y70C

Enhancing human pose estimation in ancient vase paintings via perceptually-grounded style transfer learning

Published in ACM Journal on Computing and Cultural Heritage 16 (1), 1-17, 2022

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Recommended citation: P Madhu, A Villar-Corrales, R Kosti, T Bendschus, C Reinhardt, P Bell, .... (2022). "Enhancing human pose estimation in ancient vase paintings via perceptually-grounded style transfer learning." ACM Journal on Computing and Cultural Heritage 16 (1), 1-17. https://scholar.google.com/citations?view_op=view_citation&hl=en&user=tEe1-TYAAAAJ&citation_for_view=tEe1-TYAAAAJ:Tyk-4Ss8FVUC

Effect of Random Histogram Equalization on Breast Calcification Analysis Using Deep Learning

Published in Bildverarbeitung für die Medizin 2022: Proceedings, German Workshop on  …, 2022

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Recommended citation: AB Panambur, P Madhu, A Maier. (2022). "Effect of Random Histogram Equalization on Breast Calcification Analysis Using Deep Learning." Bildverarbeitung für die Medizin 2022: Proceedings, German Workshop on  …. https://scholar.google.com/citations?view_op=view_citation&hl=en&user=tEe1-TYAAAAJ&citation_for_view=tEe1-TYAAAAJ:YsMSGLbcyi4C

ARIN: Adaptive Resampling and Instance Normalization for Robust Blind Inpainting of Dunhuang Cave Paintings

Published in 2022 Eleventh International Conference on Image Processing Theory, Tools and  …, 2022

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Recommended citation: A Schmidt, P Madhu, A Maier, V Christlein, R Kosti. (2022). "ARIN: Adaptive Resampling and Instance Normalization for Robust Blind Inpainting of Dunhuang Cave Paintings." 2022 Eleventh International Conference on Image Processing Theory, Tools and  …. https://scholar.google.com/citations?view_op=view_citation&hl=en&user=tEe1-TYAAAAJ&citation_for_view=tEe1-TYAAAAJ:WF5omc3nYNoC

2020

Understanding Compositional Structures in Art Historical Images Using Pose and Gaze Priors: Towards Scene Understanding in Digital Art History

Published in European Conference on Computer Vision, 109-125, 2020

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Recommended citation: P Madhu, T Marquart, R Kosti, P Bell, A Maier, V Christlein. (2020). "Understanding Compositional Structures in Art Historical Images Using Pose and Gaze Priors: Towards Scene Understanding in Digital Art History." European Conference on Computer Vision, 109-125. https://scholar.google.com/citations?view_op=view_citation&hl=en&user=tEe1-TYAAAAJ&citation_for_view=tEe1-TYAAAAJ:qjMakFHDy7sC

2019

Recognizing Characters in Art History Using Deep Learning

Published in Proceedings of the 1st Workshop on Structuring and Understanding of  …, 2019

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Recommended citation: P Madhu, R Kosti, L Mührenberg, P Bell, A Maier, V Christlein. (2019). "Recognizing Characters in Art History Using Deep Learning." Proceedings of the 1st Workshop on Structuring and Understanding of  …. https://scholar.google.com/citations?view_op=view_citation&hl=en&user=tEe1-TYAAAAJ&citation_for_view=tEe1-TYAAAAJ:d1gkVwhDpl0C

2018

Talks

Objectifying the subjective - enhancing object detection in vase paintings

February 19, 2020

Talk, FAU Erlangen Nuernberg, Department of Pattern Recognition, Erlangen, Germany

This talk was presented at the Pattern Recognition Symposium in February, 2020 at FAU, Erlangen-Nuernberg. This talk was focused on enhancing object detection for classical archaeological artworks. This work is in progress and this presentation was a part of it, abstract of which has been accepted at Alliance for Digital Humanities, 2020 (ADHO 2020), Ottawa, Canada.

Deep Learning based Super resolution

February 19, 2020

Talk, FAU Erlangen Nuernberg, Department of Pattern Recognition, Erlangen, Germany

This talk was presented at the Pattern Recognition Symposium in March, 2019 at FAU, Erlangen-Nuernberg. This talk had two parts: a) Brief description about my Masters’ thesis b) Plans and Introduction to my PhD topic and data.

Invited Talk - Summer School on Deep Learning

June 18, 2018

Tutorial, DAIICT, Gandhinagar, Gujarat, India

While working at Infocusp Innovations Pvt. Ltd., I was one of the keynote speakers for Summer School on Deep learning organized by IEEE Student Branch, DAIICT. There were 200+ students attending this summer school.

Teaching

Teaching Assistant, Introduction to Computer Vision

Graduate course, Friedrich-Alexander-Universität Erlangen-Nürnberg, Chair of Pattern Recognition, 2020

Teaching assistant for Introduction to Computer Vision at the Chair of Pattern Recognition, under the supervision of Dr. Ronak Kosti.

Teaching Assistant DAIICT

Undergraduate course, DAIICT, Information and Communication Technology, 2015

Tutoring experience in the subjects of Advanced Calculus, Linear Algebra and Communication systems for 1st and 2nd year Undergraduate students. Conducted teaching/assisting in classroom-like environment for 60+ students helping them with assignment questions and tutorials.