Method for realizing unlimited blue-box function used in virtual studio systems

A technology of virtual studio and blue box, which is applied in the production and broadcast of TV programs to realize unlimited blue box functions, which can solve the problems of increasing system delay, increasing cost, and unreality, and achieve the effect of perfect integration

Inactive Publication Date: 2010-03-10
CHINA DIGITAL VIDEO BEIJING
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AI Technical Summary

Problems solved by technology

[0008] The first method needs to add an image processing card, which increases the cost and increases the system delay, which makes people feel unreal; the latter two methods need to be modeled according to the geometric size of the blue box, the position of the cam

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  • Method for realizing unlimited blue-box function used in virtual studio systems
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  • Method for realizing unlimited blue-box function used in virtual studio systems

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Embodiment Construction

[0022] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0023] The present invention adopts the mask technology to realize the infinite blue box function, that is, the key signal is generated through the occlusion relationship. According to the current basic types of blue boxes: left L-shaped, right L-shaped, and U-shaped, the method dynamically generates infinite blue boxes. The user only needs to input the current real blue box size to adjust the parameters of length, width and height in real time. Adjust the position of the infinite blue box in real time, without the need for very precise measurement of the blue box, to achieve the effect of blocking.

[0024] Take the U-shaped blue box as an example, such as image 3 As shown, the real rectangular blue box is composed of four planes, and the field of view of the camera is Figure 4 Shown. The camera has two degrees of freedom: pan and tilt, Figure 4 View1 cor...

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Abstract

The invention relates to a television-program producing-broadcasting technique in the field of radio and television, in particular to a method for realizing unlimited blue-box function used in virtualstudio systems. The method is characterized in that surface sheet structures are generated in a complementary-set region of a blue box to form a geometric body; each surface of the geometric body isa plane; every plane is taken as a mask; filled signals are background signals; when a camera is swung out of a blue-box region, the planes taken as masks are rendered in an Alpha cache; meanwhile, according to foreground, background and occlusion relation, three-dimensional objects used to occlude the foreground are extracted to be rendered in the Alpha cache; rendered images are synthesized to be video signals output to a color key through an Alpha channel; and the color key serving as a foreign key is synthesized with the background and the foreground in real time to generate video images reflecting three-dimensional effects. The method during application can fine adjust the size of blue boxes in order to be matched with different size of the blue boxes to realize final occlusion effects, thereby perfectly fusing the foreground with the background.

Description

Technical field [0001] The invention relates to television program production and broadcasting technology in the field of radio and television, and in particular to a method for realizing the function of an infinite blue box for a virtual studio system. Background technique [0002] Virtual studio is a unique TV program production technology developed in recent years. The virtual studio system obtains the foreground image from the camera, and obtains the motion parameters of the camera through the tracking system, and the delayer delays the video signal output by the camera; the graphics workstation generates the background signal and background signal of the 3D virtual scene in real time according to the motion parameters of the camera. Mask signal: The delayed video signal, 3D virtual scene signal and mask signal are synthesized in the matting synthesizer and output to the video recording device. The virtual studio system makes full use of computer three-dimensional graphics a...

Claims

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Application Information

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IPC IPC(8): H04N5/262H04N5/272G06T15/00
Inventor 马菲莹李涛
Owner CHINA DIGITAL VIDEO BEIJING
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