Abstract: Techniques for detecting object motion within a monitored scene are disclosed. In an embodiment, an infrared motion sensing device can include an infrared detector configured to receive infrared radiation from the monitored scene within a detection field of view and to generate an output waveform signal indicative of time-dependent variations in the received infrared radiation in response to object motion within the detection field of view. The infrared motion sensing device can also include a processor configured to receive the output waveform signal generated by the infrared detector and perform a signal analysis based on the output waveform signal to determine whether a motion event has occurred, which can involve finding a match between the output waveform signal and the one or more reference waveform signals. Upon determination that a motion event has occurred, the processor can be controlled, for example, to trigger an image sensor to capture an image.

Abstract: A surveillance camera has a power unit; a control unit selectively powered by the power unit; a subject detection sensor powered by the power unit; and an image sensor operatively connected to the subject detection sensor and the control unit. The subject detection sensor detects a presence of a subject within limits of subject detection parameters and a length of time wherein the subject detection sensor detects the presence of the subject within the limits of the subject detection parameters defines a subject detection time period. The image sensor and the control unit are constantly activated by the power unit during the subject detection time period where the subject detection sensor detects the presence of the subject within the limits of the subject detection parameters.