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$25 is worth considering. This is a stand alone, ionization only smoke detector that's been around for a number of years. That may be why user reviews are a little mixed as the overarching complaint among those that are less than completely satisfied is that the smoke detector's battery petered out far sooner than the promised 10 years. Still, its satisfaction ratings are no worse than other cheap ionization smoke detectors that are similar. Examples include 4. 1 stars following nearly 400 reviews at Amazon, for example, and a rating of 4.security in san diego
In some implementations, after a motion start is detected, the relevant portion of the video stream is retrieved from storage e. g. , from video and source data database 509. In some implementations, the event identification process includes segmenting the video stream into multiple segments then categorizing the event candidate within each segment. In some implementations, categorizing the event candidate includes an aggregation of background factors, entity detection and identification, motion vector generation for each motion entity, entity features, and scene features to generate motion features for the event candidate. In some implementations, the event identification process further includes categorizing each segment, generating or updating an event log based on categorization of a segment, generating an alert for the event based on categorization of a segment, categorizing the complete event, updating the event log based on the complete event, and generating an alert for the event based on the complete event. In some implementations, a categorization is based on a determination that the event occurred within a particular zone of interest. In some implementations, a categorization is based on a determination that the event candidate involves one or more zones of interest. In some implementations, a categorization is based on audio data and/or audio event characterization. In some implementations, the video source 501 e. g.