Student tracking and positioning method based on primary and secondary cameras

A main camera, tracking and positioning technology, applied in the field of image processing, can solve the problems of high equipment cost, affecting the effect of class, easy to be disturbed by the environment, etc., and achieve good robustness

Active Publication Date: 2015-04-29
NANJING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high cost of existing student tracking and positioning technology equipment, easy to be disturbed by the environment, and affect the real class effect, etc., and provides a student tracking and positioning method based on master-slave cameras....

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  • Student tracking and positioning method based on primary and secondary cameras
  • Student tracking and positioning method based on primary and secondary cameras
  • Student tracking and positioning method based on primary and secondary cameras

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Embodiment Construction

[0030] The invention will be described in further detail below in conjunction with the accompanying drawings.

[0031] Such as Figure 1-5d Shown, in the present invention, two from cameras are common hemispherical cameras, need not rotate and zoom during work, and master camera is the camera that can up, down, left, right rotation and can zoom with the cloud platform, so The video capture card used must be able to support simultaneous capture of more than three channels of video signals. Through the video capture card, the collected three-way video signals are processed simultaneously by using multi-thread programming technology. The following are the working steps of the system:

[0032] Step 1: Two slave cameras installed on both sides of the blackboard at the same level as the students will automatically perform frame difference training on the video sequence three seconds before the class, so as to obtain more than 20 pixels above the highest point of the contour to the...

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Abstract

The invention discloses a student tracking and positioning method based on primary and secondary cameras. The method does not influence normal teaching of a lesson, is higher in adaptability to change of external environment such as light rays and can handle the situation that two students stand up. According to the method, two secondary cameras and one primary camera with a cradle head device are used. The secondary cameras can generate a region-of-interest automatically or manually, detect whether students enter or leave the region-of-interest or not through a background difference method and send detection results to the primary camera; the primary camera judges the number of students standing up according to the information transmitted from the secondary cameras, and selects a panoramic recording mode or a positioning recording mode according to the number of the students standing up, wherein in the positioning recording mode, profiles of all moving objects are detected through an inter-frame difference method, the object, of which, the profile central point is highest, is judged to be a student, the primary camera is driven to rotate and zoom according to the coordinates and the area of the student, so that positioning of the students is realized.

Description

technical field [0001] The invention relates to a student tracking and positioning method based on a master-slave camera in a classroom recording and broadcasting system, and belongs to the technical field of image processing. Background technique [0002] The emergence of the intelligent recording and broadcasting system is a revolutionary change for the traditional classroom teaching video, which solves the complexity of manual shooting and the interference to classroom teaching. The intelligent recording and broadcasting system must accurately locate the teachers and students before shooting. Among them, compared with the tracking and positioning of the teachers, the tracking and positioning of the students has many problems, such as large shooting range, easy to be interfered, and difficult to determine the zoom factor of the camera. At present, the widely used student tracking and positioning technologies in the intelligent recording and broadcasting system include infr...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/20H04N7/18
CPCG06T7/215G06T7/80H04N7/181
Inventor 唐贵进朱秀昌赵以国刘小花崔子冠刘峰
Owner NANJING UNIV OF POSTS & TELECOMM
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