Details
| Original language | English |
|---|---|
| Title of host publication | INFORMATIK 2009 |
| Subtitle of host publication | Im Focus das Leben, Beitrage der 39. Jahrestagung der Gesellschaft fur Informatik e.V. (GI) |
| Pages | 2181-2194 |
| Number of pages | 14 |
| Publication status | Published - 2009 |
| Event | 39th Annual Meeting of the German Informatics Society (GI): Focus on Life, INFORMATIK 2009 - Lübeck, Germany Duration: 28 Sept 2009 → 2 Oct 2009 |
Publication series
| Name | INFORMATIK 2009 - Im Focus das Leben, Beitrage der 39. Jahrestagung der Gesellschaft fur Informatik e.V. (GI) |
|---|
Abstract
Each mobile phone with a built-in CMOS sensor can inherently be seen as sophisticated optical sensor being able to analyze its environment in terms of visual events and its own mobility. Due to mass production their price decreases steadily, although their processing capacity increases. Mobile phones are usually attached to people, who are driven by mobility. We define activities arising from this mobility as internal activities in contrast to external activities, that are caused by visual events. Both activities can be recognized by measuring the sensor's optical flow. We present a method to identify internal activities based on optical flow measurements and probabilistic reasoning. We implement a lifelogging application, running on a Linux-based mobile phone, that can detect internal activities such as moving left-hand, right-hand or walking with a recognition rate of 80%. While standing still external activities are recognized using object detection.
ASJC Scopus subject areas
- Computer Science(all)
- Information Systems
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INFORMATIK 2009: Im Focus das Leben, Beitrage der 39. Jahrestagung der Gesellschaft fur Informatik e.V. (GI). 2009. p. 2181-2194 (INFORMATIK 2009 - Im Focus das Leben, Beitrage der 39. Jahrestagung der Gesellschaft fur Informatik e.V. (GI)).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Activity recognition using optical sensors on mobile phones
AU - Wittke, Michael
AU - Jänen, Uwe
AU - Duraslan, Aret
AU - Cakar, Emre
AU - Steinberg, Monika
AU - Brehm, Jurgen
PY - 2009
Y1 - 2009
N2 - Each mobile phone with a built-in CMOS sensor can inherently be seen as sophisticated optical sensor being able to analyze its environment in terms of visual events and its own mobility. Due to mass production their price decreases steadily, although their processing capacity increases. Mobile phones are usually attached to people, who are driven by mobility. We define activities arising from this mobility as internal activities in contrast to external activities, that are caused by visual events. Both activities can be recognized by measuring the sensor's optical flow. We present a method to identify internal activities based on optical flow measurements and probabilistic reasoning. We implement a lifelogging application, running on a Linux-based mobile phone, that can detect internal activities such as moving left-hand, right-hand or walking with a recognition rate of 80%. While standing still external activities are recognized using object detection.
AB - Each mobile phone with a built-in CMOS sensor can inherently be seen as sophisticated optical sensor being able to analyze its environment in terms of visual events and its own mobility. Due to mass production their price decreases steadily, although their processing capacity increases. Mobile phones are usually attached to people, who are driven by mobility. We define activities arising from this mobility as internal activities in contrast to external activities, that are caused by visual events. Both activities can be recognized by measuring the sensor's optical flow. We present a method to identify internal activities based on optical flow measurements and probabilistic reasoning. We implement a lifelogging application, running on a Linux-based mobile phone, that can detect internal activities such as moving left-hand, right-hand or walking with a recognition rate of 80%. While standing still external activities are recognized using object detection.
UR - http://www.scopus.com/inward/record.url?scp=80055106920&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:80055106920
SN - 9783885792482
T3 - INFORMATIK 2009 - Im Focus das Leben, Beitrage der 39. Jahrestagung der Gesellschaft fur Informatik e.V. (GI)
SP - 2181
EP - 2194
BT - INFORMATIK 2009
T2 - 39th Annual Meeting of the German Informatics Society (GI)
Y2 - 28 September 2009 through 2 October 2009
ER -