Ubicomp07 Intel Mit

A Long-Term Evaluation of Sensing Modalities for Activity Recognition September 19 2007 Beth Logan 1 , Jennifer Healey 1 , Matthai Philipose 2 , Emanuel Munguia Tapia 3 and Stephen Intille 3 1 Intel Digital Health, 2 Intel Research Seattle, 3 MIT House_n

Activity Recognition ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Our Approach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

MIT House_n PlaceLab ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Built-In Sensors ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Barometric pressure Humidity Temperature IR video camera Color video camera Top-down camera Light sensor Microphone Switches to detect open/close Temperature Water flow Current

RFID Tags and Bracelet ,[object Object],RFID Bracelet RFID Tags

Motion Based Sensors ,[object Object],[object Object],[object Object],[object Object]

Study Detail ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Characteristics of Data Collected ,[object Object],6 s Drying dishes 24 s Washing hands 34 s Making the bed 42 s Leaving the home 44 s Preparing a snack 359 min Reading book/paper/magazine 728 min Sleeping deeply 732 min Actively watching tv or movies 813 min Background listening to music or radio 1866 min Using a computer Total Observed Time Activity

Activities Studied ,[object Object],[object Object],[object Object],4.8 min 32.7 min 21.0 min 54 s 6.0 min 2.1 min 5.0 min 29s 51.1 min Std Dev. Time 2.0 min 19.2 min 14.4 min 27 s 3.1 min 1.1 min 1.6 min 23 s 33.3 min Mean Time 204 min Using a phone 1866 min Using a computer 359 min Reading book/paper/magazine 59 min Meal preparation 116 min Hygiene 50 min Grooming 311 min Eating 11 min Dishwashing 732 min Actively watching tv or movies Total Time Activity

Activity Recognition Experiments ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Results: All Sensors Excellent  Poor 

Results: Motion-based Sensors Excellent  Poor 

Why Is Infra-red So Good ? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why Does RFID Perform So Poorly? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Eating/Reading/Phone Use ,[object Object],[object Object],[object Object],[object Object]

Discovered in Hindsight… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Behavioral Factors ,[object Object],[object Object],[object Object],[object Object]

Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Future Directions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Katz Index of Independence in Activities of Daily Living ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Characteristics of Activities Studied ,[object Object],4.8 min 32.7 min 21.0 min 54 s 6.0 min 2.1 min 5.0 min 29s 51.1 min Std Dev. Time 2.0 min 19.2 min 14.4 min 27 s 3.1 min 1.1 min 1.6 min 23 s 33.3 min Mean Time 204 min Using a phone 1866 min Using a computer 359 min Reading book/paper/magazine 59 min Meal preparation (cutting, slicing, warming food, retrieving ingredients/cookware, mixing, combining, washing ingredients, preparing a drink etc) 116 min Hygiene (showering, brushing teeth, toileting etc; many ‘hygiene misc’ activities because of lack of camera in bathroom) 50 min Grooming (getting dressed/undressed, mostly taking on and off coats and wearable sensors in the hallway due to lack of camera in bedroom) 311 min Eating (eating meals, eating snacks and drinking) 11 min Dishwashing (rinsing dishes, drying dishes etc) 732 min Actively watching tv or movies Total Time Activity

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