Research
Independent AI experiments and published academic work in computer vision, biometrics, and AI security.
Independent experiments
Character Reactor
The same words reach two different character profiles. Follow bounded semantic judgments into emotional state and a continuous, 28-channel face and body rig. Live inference runs in the browser; an expression workshop lets you inspect the visual mapping independently.
Jev cascading graph walk
Evidence gathered along a path changes which branches the walker explores next. The browser demo replays recorded Jev decisions; new live experiments require an API key.
Academic publications
"The Dark Side of the Face: Exploring the Ultraviolet Spectrum for Face Biometrics"
Authors: Timotheos Samartzidis; Dirk Siegmund; Michael Gödde; Naser Damer; Andreas Braun; Arjan Kuijper
Explores ultraviolet face imagery and melanin pigmentation patterns as a biometric modality. The study evaluates SURF feature extraction on a 91-subject multiethnic dataset.
"Fiber Defect Detection of Inhomogeneous Voluminous Textiles"
Authors: Dirk Siegmund; Timotheos Samartzidis; Biying Fu; Andreas Braun; Arjan Kuijper
Uses stereo vision and image analysis to investigate defect detection in inhomogeneous, voluminous textiles. The work addresses normalization and classification for textile inspection.
"Attack Detection in an Autonomous Entrance System Using Optical Flow"
Authors: Dirk Siegmund; Biying Fu; Timotheos Samartzidis; Aidmar Wainakh; Arjan Kuijper; Andreas Braun
Investigates optical-flow analysis for attack detection in an autonomous entrance system.
"Personalized Face Reference from Video: Key-Face Selection and Feature-Level Fusion"
Authors: Naser Damer; Timotheos Samartzidis; Alexander Nouak
Method for optimal face frame selection from video sequences with subject-specific weighting, evaluated on YouTube Faces dataset. Addresses the challenge of selecting the most representative frames for face recognition in unconstrained video environments.
"Virtual Fitting Pipeline: Body Dimension Recognition, Cloth Modeling, and On-Body Simulation"
Authors: Dirk Siegmund; Timotheos Samartzidis; Naser Damer; Alexander Nouak; Christoph Busch
Three-stage pipeline combining anthropometric measurement, cloth physics, and avatar simulation for virtual garment fitting. Integrates computer vision-based body scanning with physically-based cloth simulation for realistic virtual try-on experiences.
Academic research affiliation at the time of the publications:
Fraunhofer Institute for Computer Graphics Research (IGD)
Department of Competence Center for Cultural Heritage Digitization
Research conducted from 2013-2018 focusing on biometric systems, computer vision, and AI security applications.