M. Sc. Benjamin Herwig

AI for Computationally Intelligent Systems (AI4CIS)

Telephone: +49 561 804-6196
Fax: +49 561 804-6022
Email: bherwig[at]uni-kassel[dot]de

Website: Benjamin Herwig

Location: Wilhelmshöher Allee 73
34121 Kassel

Room: WA-altes Gebäude (WA 73), ohne Raumangabe

Publications

[ 2023 ]
[ 2014 ]
[ 2011 ]
[ 2010 ]

2023[ to top ]

Domain Imaging in Periodic Submicron Wide Nanostructures by Digital Drift Correction in Kerr Microscopy. Akhundzada, Sapida; Dingel, Kristina; Bischof, David; Janzen, Christian; Sick, Bernhard; Ehresmann, Arno. In Advanced Photonics Research, 4(10), bl 2300170. Wiley, 2023.
- [ Abstract ]
- [ BibTeX ]
- [ EndNote ]
- [ URL ]
Magneto-optical Kerr microscopy is a powerful method for imaging magnetic domains. Even though domain imaging below the diffractive resolution limit is possible, such investigations are getting increasingly complex with decreasing structure size due to the decreasing Kerr contrast. As magnetic domain images free of topographical artifacts are obtained by subtracting a reference image from the actual image, the corresponding challenges are additionally increased by unavoidable sample motion in the time interval between acquiring the two images. Software-based drift corrections typically rely on a unique structure in the image's region of interest (ROI), recognized automatically or selected manually by the user. By digital image shifting, the ROI positions in the actual and reference images are aligned, and the sample motion is compensated. For magnetic domain imaging in periodically arranged micro- or nano-objects, unique topographical features are not given, making the drift correction by ROIs difficult, often even impossible. Herein, a novel software-based approach is presented for drift corrections to image domains with features close/below the optical resolution limit and for investigating periodically arranged micro- or nano-objects without utilizing ROIs. High-contrast images are obtained, enabling the characterization of periodically arranged 1D, 2D, and 3D magnetic objects with lateral dimensions below 100 nm.
@article{akhundzada2023domain, abstract = {Magneto-optical Kerr microscopy is a powerful method for imaging magnetic domains. Even though domain imaging below the diffractive resolution limit is possible, such investigations are getting increasingly complex with decreasing structure size due to the decreasing Kerr contrast. As magnetic domain images free of topographical artifacts are obtained by subtracting a reference image from the actual image, the corresponding challenges are additionally increased by unavoidable sample motion in the time interval between acquiring the two images. Software-based drift corrections typically rely on a unique structure in the image's region of interest (ROI), recognized automatically or selected manually by the user. By digital image shifting, the ROI positions in the actual and reference images are aligned, and the sample motion is compensated. For magnetic domain imaging in periodically arranged micro- or nano-objects, unique topographical features are not given, making the drift correction by ROIs difficult, often even impossible. Herein, a novel software-based approach is presented for drift corrections to image domains with features close/below the optical resolution limit and for investigating periodically arranged micro- or nano-objects without utilizing ROIs. High-contrast images are obtained, enabling the characterization of periodically arranged 1D, 2D, and 3D magnetic objects with lateral dimensions below 100 nm.}, author = {Akhundzada, Sapida and Dingel, Kristina and Bischof, David and Janzen, Christian and Sick, Bernhard and Ehresmann, Arno}, journal = {Advanced Photonics Research}, keywords = {itegpub}, number = 10, pages = 2300170, publisher = {Wiley}, title = {Domain Imaging in Periodic Submicron Wide Nanostructures by Digital Drift Correction in Kerr Microscopy}, volume = 4, year = 2023 }
%0 Journal Article %1 akhundzada2023domain %A Akhundzada, Sapida %A Dingel, Kristina %A Bischof, David %A Janzen, Christian %A Sick, Bernhard %A Ehresmann, Arno %D 2023 %I Wiley %J Advanced Photonics Research %N 10 %P 2300170 %R https://doi.org/10.1002/adpr.202300170 %T Domain Imaging in Periodic Submicron Wide Nanostructures by Digital Drift Correction in Kerr Microscopy %U https://onlinelibrary.wiley.com/doi/abs/10.1002/adpr.20230017 %V 4 %X Magneto-optical Kerr microscopy is a powerful method for imaging magnetic domains. Even though domain imaging below the diffractive resolution limit is possible, such investigations are getting increasingly complex with decreasing structure size due to the decreasing Kerr contrast. As magnetic domain images free of topographical artifacts are obtained by subtracting a reference image from the actual image, the corresponding challenges are additionally increased by unavoidable sample motion in the time interval between acquiring the two images. Software-based drift corrections typically rely on a unique structure in the image's region of interest (ROI), recognized automatically or selected manually by the user. By digital image shifting, the ROI positions in the actual and reference images are aligned, and the sample motion is compensated. For magnetic domain imaging in periodically arranged micro- or nano-objects, unique topographical features are not given, making the drift correction by ROIs difficult, often even impossible. Herein, a novel software-based approach is presented for drift corrections to image domains with features close/below the optical resolution limit and for investigating periodically arranged micro- or nano-objects without utilizing ROIs. High-contrast images are obtained, enabling the characterization of periodically arranged 1D, 2D, and 3D magnetic objects with lateral dimensions below 100 nm.

2014[ to top ]

Programmierkompetenz prüfen … am Beispiel der Vorlesung "Einführung in C" an der Universität Kassel. Herwig, B.; Frommann, U.; Gruber, T.; Sick, B. In Neues Handbuch Hochschullehre, bll 71–94. Raabe, 2014.
- [ BibTeX ]
- [ EndNote ]
@incollection{herwig2014programmierkompetenz, author = {Herwig, B. and Frommann, U. and Gruber, T. and Sick, B.}, booktitle = {Neues Handbuch Hochschullehre}, keywords = {imported}, number = 64, pages = {71–94}, publisher = {Raabe}, title = {Programmierkompetenz pr{\"u}fen … am Beispiel der Vorlesung "Einf{\"u}hrung in C" an der Universit{\"a}t Kassel}, year = 2014 }
%0 Book Section %1 herwig2014programmierkompetenz %A Herwig, B. %A Frommann, U. %A Gruber, T. %A Sick, B. %B Neues Handbuch Hochschullehre %D 2014 %I Raabe %N 64 %P 71--94 %T Programmierkompetenz prüfen … am Beispiel der Vorlesung "Einführung in C" an der Universität Kassel
On General Purpose Time Series Similarity Measures and Their Use as Kernel Functions in Support Vector Machines. Pree, H.; Herwig, B.; Gruber, T.; Sick, B.; David, K.; Lukowicz, P. In Information Sciences, 281, bll 478–495. Elsevier, 2014.
- [ BibTeX ]
- [ EndNote ]
@article{pree2014general, author = {Pree, H. and Herwig, B. and Gruber, T. and Sick, B. and David, K. and Lukowicz, P.}, journal = {Information Sciences}, keywords = {imported}, pages = {478–495}, publisher = {Elsevier}, title = {On General Purpose Time Series Similarity Measures and Their Use as Kernel Functions in Support Vector Machines}, volume = 281, year = 2014 }
%0 Journal Article %1 pree2014general %A Pree, H. %A Herwig, B. %A Gruber, T. %A Sick, B. %A David, K. %A Lukowicz, P. %D 2014 %I Elsevier %J Information Sciences %P 478--495 %R 10.1016/j.ins.2014.05.025 %T On General Purpose Time Series Similarity Measures and Their Use as Kernel Functions in Support Vector Machines %V 281

2011[ to top ]

Enhancing a simulation environment for computer architecture to a SystemC based testbench tool for design verification. Westmeier, M.; Herwig, B.; Börcsök, J. In International Symposium on Information, Communication and Automation Technologies (ICAT), bll 1–6. IEEE, Sarajevo, Bosnia and Herzegovina, 2011.
- [ BibTeX ]
- [ EndNote ]
@inproceedings{westmeier2011enhancing, address = {Sarajevo, Bosnia and Herzegovina}, author = {Westmeier, M. and Herwig, B. and B{\"o}rcs{\"o}k, J.}, booktitle = {International Symposium on Information, Communication and Automation Technologies (ICAT)}, keywords = {imported}, pages = {1–6}, publisher = {IEEE}, title = {Enhancing a simulation environment for computer architecture to a SystemC based testbench tool for design verification}, year = 2011 }
%0 Conference Paper %1 westmeier2011enhancing %A Westmeier, M. %A Herwig, B. %A Börcsök, J. %B International Symposium on Information, Communication and Automation Technologies (ICAT) %C Sarajevo, Bosnia and Herzegovina %D 2011 %I IEEE %P 1--6 %R 10.1109/icat.2011.6102113 %T Enhancing a simulation environment for computer architecture to a SystemC based testbench tool for design verification

2010[ to top ]

Sefca, a tool for education and development. Niemand, Christian; Westmeier, Mario; Herwig, Benjamin; Börcsök, Josef. In International Conference on Networked Sensing Systems (INSS), bll 289–292. 2010.
- [ BibTeX ]
- [ EndNote ]
@inproceedings{niemand2010sefca, author = {Niemand, Christian and Westmeier, Mario and Herwig, Benjamin and Börcsök, Josef}, booktitle = {International Conference on Networked Sensing Systems (INSS)}, keywords = {not_ies}, pages = {289–292}, title = {Sefca, a tool for education and development}, year = 2010 }
%0 Conference Paper %1 niemand2010sefca %A Niemand, Christian %A Westmeier, Mario %A Herwig, Benjamin %A Börcsök, Josef %B International Conference on Networked Sensing Systems (INSS) %D 2010 %P 289--292 %T Sefca, a tool for education and development