Kai Nickel

1.5k total citations
19 papers, 916 citations indexed

About

Kai Nickel is a scholar working on Computer Vision and Pattern Recognition, Human-Computer Interaction and Artificial Intelligence. According to data from OpenAlex, Kai Nickel has authored 19 papers receiving a total of 916 indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Computer Vision and Pattern Recognition, 5 papers in Human-Computer Interaction and 4 papers in Artificial Intelligence. Recurrent topics in Kai Nickel's work include Video Surveillance and Tracking Methods (9 papers), Human Pose and Action Recognition (6 papers) and Advanced Vision and Imaging (5 papers). Kai Nickel is often cited by papers focused on Video Surveillance and Tracking Methods (9 papers), Human Pose and Action Recognition (6 papers) and Advanced Vision and Imaging (5 papers). Kai Nickel collaborates with scholars based in Germany and United States. Kai Nickel's co-authors include Rainer Stiefelhagen, Hartwig Holzapfel, Edgar Seemann, Alex Waibel, Petra Gieselmann, Michael Voit, Tobias Gehrig, Hazım Kemal Ekenel, John McDonough and Christian Wojek and has published in prestigious journals such as IEEE Transactions on Robotics, Signal Processing and Image and Vision Computing.

In The Last Decade

Kai Nickel

18 papers receiving 828 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Kai Nickel Germany	13	442	380	245	210	164	19	916
David Demirdjian United States	17	739 1.7×	432 1.1×	116 0.5×	216 1.0×	70 0.4×	35	1.1k
Mircea Nicolescu United States	12	589 1.3×	546 1.4×	308 1.3×	157 0.7×	77 0.5×	43	1.0k
Sujitha Martin United States	17	435 1.0×	288 0.8×	81 0.3×	134 0.6×	288 1.8×	36	1.1k
Matthew Turk United States	13	778 1.8×	401 1.1×	45 0.2×	197 0.9×	90 0.5×	21	1.2k
Karl–Friedrich Kraiss Germany	15	311 0.7×	405 1.1×	110 0.4×	118 0.6×	46 0.3×	47	730
Tevfik Metin Sezgin Türkiye	19	429 1.0×	369 1.0×	307 1.3×	183 0.9×	246 1.5×	81	1.2k
Cristina Urdiales Spain	17	446 1.0×	181 0.5×	141 0.6×	102 0.5×	110 0.7×	101	875
Emmanuel Dellandréa France	15	487 1.1×	94 0.2×	205 0.8×	246 1.2×	61 0.4×	31	919
Chung‐Lin Huang Taiwan	20	1.1k 2.6×	590 1.6×	162 0.7×	165 0.8×	28 0.2×	118	1.6k

Countries citing papers authored by Kai Nickel

Since Specialization

Citations

This map shows the geographic impact of Kai Nickel's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Kai Nickel with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kai Nickel more than expected).

Fields of papers citing papers by Kai Nickel

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Kai Nickel. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Kai Nickel. The network helps show where Kai Nickel may publish in the future.

Co-authorship network of co-authors of Kai Nickel

This figure shows the co-authorship network connecting the top 25 collaborators of Kai Nickel. A scholar is included among the top collaborators of Kai Nickel based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Kai Nickel. Kai Nickel is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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19 of 19 papers shown

Voit, Michael, Kai Nickel, & Rainer Stiefelhagen. (2008). Head Pose Estimation in Single- and Multi-view Environments - Results on the CLEAR ’07 Benchmarks. Repository KITopen (Karlsruhe Institute of Technology). 307–316. 1 indexed citations

Nickel, Kai & Rainer Stiefelhagen. (2007). Fast audio-visual multi-person tracking for a humanoid stereo camera head. 1. 434–441. 3 indexed citations

Stiefelhagen, Rainer, Hazım Kemal Ekenel, Christian Fügen, et al.. (2007). Enabling Multimodal Human–Robot Interaction for the Karlsruhe Humanoid Robot. IEEE Transactions on Robotics. 23(5). 840–851. 94 indexed citations

Nickel, Kai, et al.. (2006). Tracking of the Articulated Upper Body on Multi-View Stereo Image Sequences. Repository KITopen (Karlsruhe Institute of Technology). 1. 774–781. 30 indexed citations

Voit, Michael, Kai Nickel, & Rainer Stiefelhagen. (2006). A Bayesian Approach for Multi-view Head Pose Estimation. 31–34. 12 indexed citations

Nickel, Kai & Rainer Stiefelhagen. (2006). Visual recognition of pointing gestures for human–robot interaction. Image and Vision Computing. 25(12). 1875–1884. 170 indexed citations

Wojek, Christian, Kai Nickel, & Rainer Stiefelhagen. (2006). Activity Recognition and Room-Level Tracking in an Office Environment. 36 indexed citations

Wölfel, Matthias, et al.. (2006). Microphone array driven speech recognition - influence of localization on the word error rate. KITopen. 1 indexed citations

Gehrig, Tobias, et al.. (2006). Kalman filters for audio-video source localization. 2. 118–121. 45 indexed citations

10.

Stiefelhagen, Rainer, Keni Bernardin, Hazım Kemal Ekenel, et al.. (2006). Audio-visual perception of a lecturer in a smart seminar room. Signal Processing. 86(12). 3518–3533. 10 indexed citations

11.

Voit, Michael, et al.. (2005). Multi-View Head Pose Estimation using Neural Networks. 347–352. 24 indexed citations

12.

Stiefelhagen, Rainer, et al.. (2005). Natural human-robot interaction using speech, head pose and gestures. 3. 2422–2427. 128 indexed citations

13.

Nickel, Kai, Tobias Gehrig, Rainer Stiefelhagen, & John McDonough. (2005). A joint particle filter for audio-visual speaker tracking. 55 indexed citations

14.

Seemann, Edgar, et al.. (2004). Head pose estimation using stereo vision for human-robot interaction. 626–631. 90 indexed citations

15.

Nickel, Kai, Edgar Seemann, & Rainer Stiefelhagen. (2004). 3D-tracking of head and hands for pointing gesture recognition in a human-robot interaction scenario. 565–570. 27 indexed citations

16.

Holzapfel, Hartwig, Kai Nickel, & Rainer Stiefelhagen. (2004). Implementation and evaluation of a constraint-based multimodal fusion system for speech and 3D pointing gestures. 175–182. 52 indexed citations

17.

Nickel, Kai & Rainer Stiefelhagen. (2003). Pointing gesture recognition based on 3D-tracking of face, hands and head orientation. 140–146. 99 indexed citations

18.

Nickel, Kai & Rainer Stiefelhagen. (2003). Pointing gesture recognition based on 3D-tracking of face, hands and head orientation. 38 indexed citations

19.

Nickel, Kai. (1970). Fehlerschranken für die numerisch berechneten Wurzeln eines Polynoms. ZAMM ‐ Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik. 50(1-4). 81–81. 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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