@inproceedings{DotencoGoetzelmannGallwitz2014, author = {Dotenco, Sergiu and G{\"o}tzelmann, Timo and Gallwitz, Florian}, title = {Smartphone Input Using an Integrated Projector and a Monocular Camera}, series = {Lecture Notes in Computer Science}, volume = {Volume 8512}, booktitle = {Lecture Notes in Computer Science}, publisher = {Springer}, isbn = {978-3-319-07226-5}, pages = {124-133}, year = {2014}, abstract = {Touch input on modern smartphones can be tedious, especially if the touchscreen is small. Smartphones with integrated projectors can be used to overcome this limitation by projecting the screen contents onto a surface, allowing the user to interact with the projection by means of simple hand gestures. In this work, we propose a novel approach for projector smartphones that allows the user to remotely interact with the smartphone screen via its projection. We detect user's interaction using the built-in camera, and forward detected hand gestures as touch input events to the operating system. In order to avoid costly computations, we additionally use built-in motion sensors. We verify the proposed method using an implementation for the consumer smartphone Samsung Galaxy Beam equipped with a deflection mirror.}, subject = {App }, language = {en} } @inproceedings{SchaeffPuglieseGoetzelmann, author = {Sch{\"a}ff, Christian and Pugliese, Gaston and G{\"o}tzelmann, Timo}, title = {Behavior Based Web User Identification}, series = {GI-Edition / Seminars}, volume = {Volume S-13}, booktitle = {GI-Edition / Seminars}, publisher = {K{\"o}llenDruck+Verlag}, address = {Bonn}, isbn = {978-3-88579-447-9}, issn = {1614-3213}, pages = {201-204}, abstract = {This paper examines different approaches for the identification of users by their personal behavior and discusses techniques which could be used in the context of websites. Such web tracking approaches have the potential to identify users even if they use multiple or shared devices. For web pages mouse and touch input are widely used. Therefore, we propose a survey to evaluate the feasibility to identify users by their interaction behavior.}, subject = {Authentifikation}, language = {en} }