2018 – 2019

Reserach Intern, Microsoft, AI for Earth


Visiting scholar at Shanghai Jiaotong University (上海交通大学), Shanghai,
China, at the group of Prof. Weiyao Lin.


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

2014 – 2018/19

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,



Deep neural networks tremendously boosted the recognition accuracy in the recent years. My work focused on exploiting their learned knowledge for additional attention mechanisms. Our ACCV 2014 and ICCV 2015 publications showed object part discovery and localization. The ICCV 2017 paper provides an implicit attention mechanism.


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 allows for transferring the extensive knowledge of fine-grained recognition approaches to generic classification tasks.


Besides pure research, I also contributed to the development of products, for example, to the Bing search engine from Microsoft. During my Ph.D., I developed a document classification system and contributed to a road segmentation system for industry partners.

Selected publications

Marcel Simon, Erik Rodner, Trevor Darrell, Joachim Denzler. The whole is more than its parts? From explicit to implicit pose normalization.
IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI). 2018.

Marcel Simon and Yang Gao and Trevor Darrell and Joachim Denzler and Erik Rodner. Generalized orderless pooling performs implicit salient matching.
International Conference on Computer Vision (ICCV). 2017.

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 at Google Scholar.