Method and system for accurately capturing target in monitored scene

Abstract

The invention discloses a method and a system for accurately capturing a target in a monitored scene. The method comprises the following steps of: setting a static monitored scene; calibrating related parameters of a datum target in the static monitored scene; acquiring an invasive target foreground in a displayed picture, and determining the accurate size of an invasive target in the displayed picture according to the related parameters of the datum target; determining the accurate position of the invasive target in the invasive target foreground, namely determining the accurate position of the invasive target in the displayed picture. On the basis of a motion detection algorithm, the size of the invasive target is accurately determined by calibrating the standard target parameters in the specific monitored scene according to the hoisting height of a camera and a physical equation for the information of an included angle between the camera and the horizontal plane and lens imaging; a moving target is accurately locked in a certain monitored scene with high requirements; and the calibrating method can be applied to monitored scenes of pan head cameras, fixed cameras such as box cameras, and the like, and the application range is wide.

Description

technical field [0001] The invention belongs to the field of video monitoring, and in particular relates to a method and system for accurately capturing a target in a monitoring scene. Background technique [0002] Video surveillance is an important part of the field of security and prevention, and it is a comprehensive system with strong prevention capabilities. Video surveillance is widely used in many occasions because of its intuition, accuracy, timeliness and rich information content. In recent years, with the development and maturity of computer vision, image processing, pattern recognition, artificial intelligence, digital signal processing and other technologies, intelligent video surveillance technology has become the future development trend. Intelligent technology can develop different types of application technologies according to the characteristics of various application environments. At present, monitoring equipment such as video servers and DVRs have built-...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for accurately capturing targets in a monitoring scene, aiming to solve the problem that current motion detection algorithms use real-time update modeling of background images and compare them with real-time images. Influenced by the inclination and the speed of the target, the captured moving target may contain more background information or not contain sufficient target information. In some scenes with high monitoring requirements, only relying on the motion detection algorithm to extract the motion The problem that the target can no longer meet the functional requirements of some special applications

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