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Recording of the activity of people working in an office or in a living room is important for several goals: to design an evacuation route, to measure the degree of ADL (Activity of Daily Living) of single-living elderly persons, and to analyze the working contents of people, and so on. Camera systems are available for these goals, but they are weak for the light condition change (not available at...
Low-cost sensor networks for multitarget tracking are increasingly becoming important equipment in many applications. A major problem is that these sensors usually provide only a binary response in each epoch, if a target is present or absent. Efficient approaches for realizing the location and tracking of multiple targets are needed. In this paper, we develop a soft tracking system using an infrared...
A ceiling sensor system is reported in this study to recognize different activities of multiple persons in the home environment. The sensors output binary sequences by which we know the existence/nonexistence of persons under the sensors. A short-period average of the binary response is shown to be regarded as a pixel value of a top view camera, but the camera-like view is more advantage in the sense...
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