Abstract: A method for estimating a number of people currently in a region of interest include analyzing a video stream to detect each of a plurality of people within the region of interest as One or more neighbor pairs are identified from among a plurality of possible pairs of the plurality of people within the region of interest. The detected plurality of people may be clustered into one or more clusters based at least in part on the identified one or more neighboring pairs. An estimated number of people in each of the one or more clusters is determined and a representation of the estimated number of people in each of one or more of the clusters is displayed on a display.

Abstract: Methods and systems for identifying abnormal sounds in a particular environment. A normal audio stream obtained in the absence of abnormal sounds may be used as a baseline for subsequently processing an incoming audio stream with a processor to determine whether the incoming audio stream from the microphone in the particular environment includes an abnormal audio event for the particular environment. When it is determined that the incoming audio stream includes an abnormal audio event for the particular environment an electronic database may be accessed to determine a location of the abnormal audio event in the particular environment. A video camera with a field of view that includes the location of the abnormal audio event in the particular environment may be identified and the video stream from the identified video camera retrieved and displayed.

Abstract: A method for estimating a number of people currently in a region of interest include analyzing a video stream to detect each of a plurality of people within the region of interest as One or more neighbor pairs are identified from among a plurality of possible pairs of the plurality of people within the region of interest. The detected plurality of people may be clustered into one or more clusters based at least in part on the identified one or more neighboring pairs. An estimated number of people in each of the one or more clusters is determined and a representation of the estimated number of people in each of one or more of the clusters is displayed on a display.

Abstract: Methods and systems for identifying abnormal sounds in a particular environment. A normal audio stream obtained in the absence of abnormal sounds may be used as a baseline for subsequently processing an incoming audio stream with a processor to determine whether the incoming audio stream from the microphone in the particular environment includes an abnormal audio event for the particular environment. When it is determined that the incoming audio stream includes an abnormal audio event for the particular environment an electronic database may be accessed to determine a location of the abnormal audio event in the particular environment. A video camera with a field of view that includes the location of the abnormal audio event in the particular environment may be identified and the video stream from the identified video camera retrieved and displayed.

Abstract: Methods and systems for location tracking or maintaining a count of people in a building or space. An illustrative method may include storing a background image of a field of view of a video camera and receiving a video stream from the video camera. Background subtraction may be performed to identify one or more blobs in the field of view of the video camera. The size of the one or more blobs may be compared to an expected size of the blob at a similar distance from the camera. When the size of the blob is greater than the expected size of a person at the determined distance of the corresponding blob by more than a predetermined threshold the blob may be counted as two or more people.