Abstract: An optical measurement device includes: a splitter to split light into measurement light and reference light; a switch interferometer to output first interference light obtained by causing two orthogonally polarized waves of the reference light to interfere with each other, second interference light obtained by causing two orthogonally polarized waves of reflected light from a target object of the measurement light to interfere with each other, and third interference light obtained by causing the reference light and the reflected light to interfere with each other; a photoelectric converter to convert the interference light into electric signals; a digital converter to perform A/D conversion on the electric signals; and a calculation processor to obtain an optical path-length difference between the two orthogonally polarized waves of each of the reference light and the reflected light, and an optical path-length difference between the reference light and the measurement light.

Abstract: An action detection unit (110) analyzes monitor data obtained by monitoring a monitoring place, and detects a relevant action performed at the monitoring place and having a characteristic that is common to a violating action. A situation analysis unit (120) analyzes visual data obtained by photographing the monitoring place, and detects a surrounding situation of an action position equivalent to a position where the relevant action was performed. The situation analysis unit decides a nuisance degree of the relevant action on a basis of the surrounding situation. A presentation control unit (130) determines an alert level on a basis of the nuisance degree. The presentation control unit presents presentation information corresponding to the alert level with using a presentation apparatus installed at the monitoring place.

Abstract: A first estimation unit (23) estimates, on the basis of sensor data acquired from a sensor (42) allocated to a first position in a target space, a first congestion degree being a congestion degree about the first position. A second estimation unit (26) estimates a second congestion degree being a congestion degree about a second position, on the basis of the first congestion degree, the second position being a position on a travel route of a traveling object in the target space and being different from the first position. A third estimation unit (27) estimates a third congestion degree being a congestion degree about a third position which is neither the first position nor the second position in the target space, on the basis of the first congestion degree and the second congestion degree.

Abstract: A prediction data generating unit predicts the number of persons who will pass through a measurement point in a future time, by using measurement data outputted by a sensor for measuring the number of persons who have passed through the measurement point, thereby generating prediction data. A congestion prediction processing unit predicts a congestion state of the measurement point in a future time by using the prediction data generated by the prediction data generating unit, thereby generating and outputting congestion prediction data.