Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
Automatic analysis of facial expressions: the state of the art
Countries citing papers authored by Léon Rothkrantz
Since
Specialization
Citations
This map shows the geographic impact of Léon Rothkrantz'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 Léon Rothkrantz with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Léon Rothkrantz more than expected).
This network shows the impact of papers produced by Léon Rothkrantz. 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 Léon Rothkrantz. The network helps show where Léon Rothkrantz may publish in the future.
Co-authorship network of co-authors of Léon Rothkrantz
This figure shows the co-authorship network connecting the top 25 collaborators of Léon Rothkrantz.
A scholar is included among the top collaborators of Léon Rothkrantz 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 Léon Rothkrantz. Léon Rothkrantz is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Rothkrantz, Léon, et al.. (2014). Personal warning system for vessels under bad weather conditions. Research Repository (Delft University of Technology).1 indexed citations
5.
Rothkrantz, Léon. (2013). Crisis Management Using Multiple Camera Surveillance Systems. Research Repository (Delft University of Technology).3 indexed citations
6.
Lefter, Iulia, Gertjan J. Burghouts, & Léon Rothkrantz. (2012). Learning the fusion of audio and video aggression assessment by meta-information from human annotations. TNO Repository. 1527–1533.10 indexed citations
7.
Rothkrantz, Léon & Jozef Ristvej. (2012). ISCRAM 2012 Conference Proceedings - 9th International Conference on Information Systems for Crisis Response and Management.. ISCRAM.65 indexed citations
8.
Popa, Mirela & Léon Rothkrantz. (2011). Assessment of Behaviour in Serious Games of Driving Simulators. 6(2). 10.2 indexed citations
9.
Rothkrantz, Léon & Dragoş Datcu. (2010). Assessment of Emotion States During e-Learning. Research Repository (Delft University of Technology). 43. 81–92.3 indexed citations
10.
Rothkrantz, Léon. (2009). E-learning in virtual communities. Research Repository (Delft University of Technology). 42. 35–49.4 indexed citations
11.
Rothkrantz, Léon, et al.. (2009). Acoustic inversion with self noise of an autonomous underwater vehicle to measure sound speed in marine sediments. UvA-DARE (University of Amsterdam). 41–47.3 indexed citations
12.
Fitrianie, Siska & Léon Rothkrantz. (2009). Computed Ontology-based Situation Awareness of Multi-User Observations. Research Repository (Delft University of Technology).5 indexed citations
13.
Rothkrantz, Léon, et al.. (2008). Collaborative Robot Agents For AIBO Soccer. 5(2). 14–25.1 indexed citations
14.
Fitrianie, Siska, Ronald Poppe, Dragoş Datcu, et al.. (2007). A Multimodal Human-Computer Interaction Framework for Research into Crisis Management. University of Twente Research Information. 149–158.9 indexed citations
15.
Datcu, Dragoş & Léon Rothkrantz. (2007). Emotion Recognition from speech Support for WEB Lectures. 40. 203–214.2 indexed citations
16.
Datcu, Dragoş & Léon Rothkrantz. (2006). The recognition of emotions from speech using GentleBoost classifier: A comparison approach. Research Repository (Delft University of Technology).8 indexed citations
Rothkrantz, Léon, et al.. (2002). Graphed Evolutionary Computing.. 606–609.
19.
Rothkrantz, Léon, et al.. (2001). Artificial Player for Quake III Arena. 1(1). 25–32.
20.
Pantić, Maja & Léon Rothkrantz. (2000). An Expert System for Recognition of Facial Actions and their Intensity. National Conference on Artificial Intelligence. 1026–1033.20 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.