Hangzhou Hikvision Digital Technology Co., Ltd.

Ye Ren

Shiliang Pu

Zhigang Hu

Junyan Tong

Hai Yu

Linjie Shen

Di Zhang

Weiwei Cai

Hui Gong

Cheng Ma

Chao Wang

Peng Wang

Wencong Zhang

Yonghua Jia

Xiaochen Quan

Yong Zhu

Haohao Tong

A method for sending an alarm message, and belongs to the field of computer technology. The method includes: acquiring a detection image () captured by an image capturing apparatus; determining a target detection area (); and detecting a person's call status information corresponding to an image in the target detection area according to a preset on-the-phone determination algorithm model, and sending a first alarm message () to a server if the person's call status information shows that the person is on the phone.

Method and device for sending alarm message

Disclosed are systems and methods for acquiring height of a stereo camera, applied to the stereo camera. An example method includes acquiring angle information of a stereo camera, with the angle information including a pitch angle and a tilt angle. A ground image of a scenario where the stereo camera is deployed is captured and depth information of each pixel on the ground image is determined. A three-dimensional point set based on depth information of each pixel on the ground image is established, with the three-dimensional point set including coordinate information of each three-dimensional point corresponding to each pixel of the ground image. Height of the stereo camera is determined based on the angle information and the three-dimensional point set.

Stereo camera and height acquisition method thereof and height acquisition system

Embodiments of application discloses a method and device for determining external parameters of a stereo camera. The method comprises: acquiring ground surface data of a location of the stereo camera; generating, according to three-dimensional coordinates of each pixel in the ground surface data in a camera coordinate system corresponding to the stereo camera, a first plane equation in the camera coordinate system that conforms to the three-dimensional coordinates of the pixels; determining, according to a distance between the origin of the camera coordinate system and the ground surface, a setting height of the stereo camera; and generating, according to the first plane equation, a plane normal vector corresponding to the first plane equation; and determining, according to the plane normal vector, a pitch angle of the stereo camera and an inclination angle of the stereo camera. The external parameters of the stereo camera can be determined without using a reference point in a scene.

Method and device for determining external parameter of stereoscopic camera

Systems and methods are provided for hybrid video encoding. An example method includes: acquiring image information; extracting a background image based at least in part on the image information; detecting whether the background image is stable; and performing encoding switching between a background-based encoding method and a non-background encoding method based at least in part on the detection.

Systems and methods for hybrid video encoding

The disclosure discloses a method, device and system for target tracking. Wherein, the method for target tracking includes that: Global Positioning System (GPS) information of a target object monitored by tracking equipment is acquired (S); Pan/Tilt/Zoom (PTZ) coordinate information corresponding to the GPS information of the target object is obtained according to a pre-stored conversion relationship between GPS information and PTZ coordinate information (S); and the tracking equipment is regulated to control the tracking equipment to monitor the target object according to the PTZ coordinate information of the target object (S). The problem of inaccuracy of a monitoring result of a method for monitoring a tracking target in the conventional art is solved.

Method, device and system for target tracking

A method and system for people flow statistics is disclosed in the invention, wherein said method comprises: multi-types of classifiers connected in parallel are used to perform the human head detection in the current image, the respective human heads in the current image are determined; the respective determined human heads are tracked to form the human head target movement tracks; and the people flow is counted at the direction of the human head target movement track. It can be seen, a plurality of classifiers connected in parallel are used in the invention, multi-types of human head targets, such as dark colored hair, light colored hair and caps of various colors, and the like, can be detected simultaneously.

Method and system for people flow statistics

Growing community of inventors

Hangzhou, China

Ye Ren