Abstract: Erratic behavior of one or more people within a video stream may be ascertained by analyzing the video stream to detect one or more people and to determine a measure of size of each of the detected people. A movement speed of each of the detected people is determined, and is normalized with respect to the determined measure of size of that person. An average of the movement speeds of all of the detected people is determined. The average of the movement speeds of all of the detected people is compared to an ambient speed. A determination is made that erratic behavior exists when the average of the movement speeds exceeds the ambient speed by at least a threshold. When a determination is made that erratic behavior exists, an erratic movement alert is outputted.

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: Improving performance of a video analytics algorithm includes obtaining desired video parameters for achieving a desired accuracy level, and identifying one or more of the video parameters of the video stream. One or more of the video parameters are compared with a corresponding one of the desired video parameters to ascertain whether one or more of the video parameters diverge from the corresponding one of the desired video parameters by at least a threshold amount. When one or more of the video parameters diverge from the corresponding one of the desired video parameters by at least the threshold amount, one or more of the video parameters are adjusted toward the corresponding one of the desired video parameters.

Abstract: A method for reducing alarm notifications from a security system deploying a plurality of cameras within a monitored area includes processing a first video stream captured by the first camera of the security system to detect an alarm event observed in the Field of View (FOV) of the first camera and processing a second video stream captured by a second camera of the security system to detect the same alarm event observed in the FOV of the second camera. A combined alarm notification corresponding to the alarm event is sent, wherein the combined alarm notification includes the alarm event and may identify the first camera and the second camera as both detecting the same alarm event in their respective FOVs.

Abstract: Erratic behavior of one or more people within a video stream may be ascertained by analyzing the video stream to detect one or more people and to determine a measure of size of each of the detected people. A movement speed of each of the detected people is determined, and is normalized with respect to the determined measure of size of that person. An average of the movement speeds of all of the detected people is determined. The average of the movement speeds of all of the detected people is compared to an ambient speed. A determination is made that erratic behavior exists when the average of the movement speeds exceeds the ambient speed by at least a threshold.

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: The present disclosure provides a method for synthesizing fibrous silica nanospheres, the method can include, in sequence, the steps of: a) providing a reaction mixture comprising a silica precursor, a hydrolyzing agent, a template molecule, a cosurfactant and one or more solvents; b) maintaining the reaction mixture under stirring for a length of time; c) heating the reaction mixture to a temperature for a length of time; d) cooling the reaction mixture to obtain a solid, and (e) calcinating the solid to pro duce fibrous silica nanospheres, wherein desirable product characteristics such as particle size, fiber density, surface area, pore volume and pore size can be obtained by controlling one or more parameters of the method. The present disclosure further provides a method for synthesizing fibrous silica nanospheres using conventional heating such as refluxing the reactants in an open reactor, thereby eliminating the need for microwave heating in a closed reactor or the need for any pressure reactors.

Abstract: The present disclosure provides a method for synthesizing fibrous silica nanospheres, the method can include, in sequence, the steps of: a) providing a reaction mixture comprising a silica precursor, a hydrolyzing agent, a template molecule, a cosurfactant and one or more solvents; b) maintaining the reaction mixture under stirring for a length of time; c) heating the reaction mixture to a temperature for a length of time; d) cooling the reaction mixture to obtain a solid, and (e) calcinating the solid to pro duce fibrous silica nanospheres, wherein desirable product characteristics such as particle size, fiber density, surface area, pore volume and pore size can be obtained by controlling one or more parameters of the method. The present disclosure further provides a method for synthesizing fibrous silica nanospheres using conventional heating such as refluxing the reactants in an open reactor, thereby eliminating the need for microwave heating in a closed reactor or the need for any pressure reactors.