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Initial positioning method and device for camera in virtual studio system

A technology of virtual studio and initial positioning, which is applied in the field of TV program production to achieve the effect of convenient initial positioning

Inactive Publication Date: 2015-04-29
CHINA DIGITAL VIDEO BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you need to locate during the shooting process, you need to bring the marker points back into the blue box, which brings a lot of trouble to the shooting process

Method used

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  • Initial positioning method and device for camera in virtual studio system
  • Initial positioning method and device for camera in virtual studio system

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Embodiment Construction

[0033] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] The virtual studio system is a new TV program production system that has emerged with the rapid development of computer technology and the continuous improvement of chroma key technology in recent years. In the virtual studio system, the working status information of the camera is transmitted to the graphics workstation, and the computer obtains the distance and relative position between the foreground object and the camera, thereby calculating the most suitable size and position of the virtual scene, and generating according to the requirements. 3D model of the virtual scene. The live video adopts the principle of chroma key, and puts the host or actor in front of the blue background curtain to perform, and then uses the k...

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Abstract

The invention discloses an initial positioning method for a camera in a virtual studio system. A light blue rectangular frame of specific size is coated on a blue box wall in the shooting right front of the camera. The method comprises the following steps of: aligning the camera with the rectangular frame to shoot a foreground image; extracting angular point coordinates of the rectangular frame in the foreground image; and calculating an initial attitude matrix of the current camera by iteration according to the angular point coordinates. By a simple and feasible mode, the initial positioning of the camera in the shooting process can be more convenient and quicker.

Description

technical field [0001] The invention relates to the technical field of television program production, in particular to a camera initial positioning method in a virtual studio system and a camera initial positioning device in the virtual studio system. Background technique [0002] Virtual studio is a unique TV program production technology developed in recent years. Its essence is to digitally synthesize the virtual 3D model made by the computer and the moving images of the objects captured by the camera in real time, so that the object images and the virtual background can change synchronously, so as to achieve the fusion of the two to obtain a perfect composite picture. The virtual studio technology is based on the traditional chroma keying technology, making full use of computer 3D graphics technology and video synthesis technology, according to the position and parameters of the camera, so that the perspective relationship of the 3D virtual scene is consistent with the f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/262G06T7/00
Inventor 马菲莹
Owner CHINA DIGITAL VIDEO BEIJING