Student Assistant / HiWi Position: Semantic 3D Surface Reconstruction

3D Reconstruction
3D Reconstruction
3D Reconstruction

Student Assistant / HiWi Position in the Context of (Semantic) 3D Surface Reconstruction Using Satellite Images


The Fraunhofer Institute of Optronics, System Technologies and Image Exploitation (IOSB) in Ettlingen supports research in different areas such as real-time image processing, pattern recognition, or performance optimization of electro-optical systems.

In the department Object Recognition we are working on the reconstruction of urban areas using multi-date satellite images. The corresponding three-dimensional models include not only texture information but also semantic labels. In order to manage the problem complexity, the task is decomposed into several, more controllable sub-problems. With the rapid advancement of computer vision there are frequently new possibilities available that allow to improve existing parts of our current processing pipeline.

Thus, we are offering several Student Assistant / Hiwi positions for improving specific sub-problems with current state-of-the-art techniques. Potential topics include (but are not necessarily limited to):

  • 3D reconstruction / representation of satellite images with Neural Radiance Fields [1, 4] , Structure from Motion [6], or similar.
  • Semantic segmentation of satellite images with SegFormers [5], Hierarchical Multi-Scale Attention [2], or similar.
  • Semantic segmentation of satellite images with missing labels with [3].
  • ...


  • Enrolled in computer science or a similar field of study.
  • Solid programming skills (preferably in python).
  • High intrinsic motivation and interest to acquire knowledge of new methods reflecting the current state-of-the-art in computer vision.
  • Experience relevant for the chosen topic (e.g. lecture attendance, seminars or internships in computer vision such as deep learning, structure from motion or similar).

Your Tasks

The following outline represents a reference and might vary according to the selected topic:

  • Literature search including the determination of current state-of-the-art methods and corresponding datasets.
  • Adaptation of the selected methods to the domain of satellite images by addressing satellite-specific boundary conditions (if necessary).
  • Integration of the (adapted) method into our framework.
  • Quantitative evaluation of the developed method including a comparison with the baseline performance.
  • Extension of the approach using own ideas to improve the quality of the obtained results.

What We Offer

  • Transparent salary according to the general work agreement for employing assistant staff.
  • Support and guidance to publish your findings in a scientific paper (including conference attendance).
  • Monthly working hours that can be adjusted to your needs.
  • Due to the current pandemic situation we provide all required hardware components to work remotely. However, in order to receive and return the hardware, it is necessary to appear in person at the institute (in Ettlingen, Baden-Württemberg) at the beginning and at the end of your contract!

In case of identical qualifications, preference will be given to severely disabled candidates. The Fraunhofer-Gesellschaft is committed to providing equal career opportunities for men and women.

Contact & Application

If you have any questions or would like to send us your application (including your CV and Transcript of Records), please contact:


  1. Dawa Derksen and Dario Izzo. Shadow neural radiance fields for multi-view satellite photogrammetry. In Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) Workshops, 2021.
  2. Andrew Tao, Karan Sapra, and Bryan Catanzaro. Hierarchical multi-scale attention for semantic segmentation. CoRR, abs/2005.10821, 2020.
  3. Onur Tasar, Yuliya Tarabalka, and Pierre Alliez. Incremental learning for semantic segmentation of large-scale remote sensing data. CoRR, abs/1810.12448, 2018.
  4. Yuanbo Xiangli, Linning Xu, Xingang Pan, Nanxuan Zhao, Anyi Rao, Christian Theobalt, Bo Dai, and Dahua Lin. Citynerf: Building nerf at city scale. arXiv preprint arXiv:2112.05504, 2021.
  5. Enze Xie, Wenhai Wang, Zhiding Yu, Anima Anandkumar, Jose M Alvarez, and Ping Luo. Segformer: Simple and effcient design for semantic segmentation with transformers. arXiv preprint arXiv:2105.15203, 2021.
  6. Kai Zhang, Noah Snavely, and Jin Sun. Leveraging vision reconstruction pipelines for satellite imagery. In Proceedings of the IEEE/CVF International Conference on Computer Vision (ICCV) Workshops, 2019.


Open positions in the department OBJ

Click here to find further job offers for student assistants or for theses in the department OBJ.

Department OBJ of Fraunhofer IOSB

You want to learn more about our projects in the field of Object Recognition? Then visit the page of our department OBJ and find out about other projects.