Visiting scholar at ICSI / UC Berkeley, California, USA, at the group of
Prof. Trevor Darrell.

since 2014

PhD student in computer vision at Computer Vision Group,
Friedrich-Schiller-Universität, Jena, Germany.
Supervised by Prof. Dr. Joachim Denzler and Dr. Erik Rodner.


Exchange Semester, University of Mississippi, Oxford, USA.

2011 – 2014

Master of science in computer science, Friedrich-Schiller-Universität, Jena,
Germany. Received “Germany Scholarship” for high-achieving and committed
students provided by IBM, demandware and the state of Germany.

2008 – 2011

Bachelor of science in computer science, Friedrich-Schiller-Universität, Jena,



Convolutional networks tremendously boosted the classification accuracy in the recent years. My goal is to exploit their inherent knowledge for other tasks like part discovery and localization. Our ACCV and ICCV paper published in 2014 and 2015 show the huge potential of this approach.


My work focuses on fine-grained classification, which is the automated recognition of visually very similar object categories like bird species or car models. I concentrate on improving state-of-the-art approaches especially in the scenario of weakly annotated images.


A core ingredient of most fine-grained classification approaches are object part locations. In order to improve classification accuracy, my research also includes finding the most discriminative object parts without the need of annotations provided by humans. This will allow for transferring the extensive knowledge of fine-grained recognition approaches to generic classification tasks.


Besides pure research, I also contribute to the development of products at my chair’s partners in industry. A document classification system and a road segmentation system are examples for that.

Selected publications

Marcel Simon and Erik Rodner. Neural Activation Constellations: Unsupervised Part Model Discovery with Convolutional Networks
International Conference on Computer Vision (ICCV). 2015.

Erik Rodner and Marcel Simon and Bob Fisher and Joachim Denzler. Fine-grained Recognition in the Noisy Wild: Sensitivity Analysis of Convolutional Neural Networks Approaches
British Machine Vision Conference (BMVC). 2016.

Marcel Simon and Erik Rodner and Joachim Denzler. Part Detector Discovery in Deep Convolutional Neural Networks
Asian Conference on Computer Vision (ACCV). 162-177. 2014.

Marcel Simon and Erik Rodner and Joachim Denzler. Fine-grained Classification of Identity Document Types with Only One Example
Machine Vision Applications (MVA). 126 – 129. 2015.

Erik Rodner and Marcel Simon and Gunnar Brehm and Stephanie Pietsch and J. Wolfgang Wägele and Joachim Denzler. Fine-grained Recognition Datasets for Biodiversity Analysis
CVPR Workshop on Fine-grained Visual Classification (CVPR-WS). 2015

Joachim Denzler and Erik Rodner and Marcel Simon. Convolutional Neural Networks as a Computational Model for the Underlying Processes of Aesthetics Perception
ECCV Workshop on Computer Vision for Art Analysis. 2016.

A list of all publications can be found here.