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Auxiliary camera light graphic relay tracking method in virtual studio system

A technology of virtual studio and camera, which is applied in the parts of TV system, image communication, TV, etc. It can solve the problems of system instability, low precision, blurred grid, etc., and achieve strong anti-interference ability and improved technical indicators , the effect of strong stability

Inactive Publication Date: 2008-07-02
西安宏源视讯设备有限责任公司
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Problems solved by technology

But there are many disadvantages: the accuracy is not high; when there are many foreground objects or local close-ups of the camera, the grid cannot be applied when the grid is blocked by the foreground, resulting in system instability; in order to focus on the grid, the foreground is blurred or in order to make the foreground clear. The grid is blurred, which reduces the recognition accuracy; in order to identify blue signals with different color saturation, the quality of the system's chroma key is reduced; this method generally cannot be used independently
[0007] Due to the huge defects in various tracking methods at present, the virtual studio system is severely restricted in practical application, which affects the function and marketing of the virtual studio system

Method used

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  • Auxiliary camera light graphic relay tracking method in virtual studio system

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Embodiment Construction

[0019] as attached figure 1 As shown, an auxiliary camera 4 is installed above the pan / tilt 2, tripod 3, rocker arm or its appendages of the foreground camera 1, so that the scene remains relatively stable, does not affect other operations, and has a relatively obvious color contrast or brightness contrast. In principle, the angle of the auxiliary camera 4 is selected, which can be selected as vertical or parallel to the ground, so as to convert with the movement of the foreground camera 1 .

[0020] If the color contrast or brightness contrast of the image captured by the auxiliary camera 4 is too uniform, it is necessary to selectively add light patterns 5 of different colors or brightness in the studio, so that the color or color of each pixel in the image captured by the auxiliary camera 4 The brightness is not exactly consistent. The added light pattern 5 has no requirements on shape, size, brightness or color, but the greater the color contrast or brightness contrast wi...

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Abstract

A method for relay - tracking light image of auxiliary video camera in virtual studio system includes setting auxiliary video camera on rotary table, tripod, swinging arm or other accessory of foreground video camera , adding light image with different color or different lightness above or around foreground video camera to let image shot by auxiliary video camera have inconsistence color or brightness at each pixel on image , obtaining movement parameter of auxiliary video camera by calculating shot image with tracking server and then obtaining foreground video camera movement parameter according to auxiliary video camera movement parameter and location relation of two video cameras .

Description

technical field [0001] The invention relates to camera movement parameter measurement and tracking methods, in particular to a non-contact optical pattern relay tracking of the spatial position and attitude field frequency speed of a moving target object in a limited space using an auxiliary camera in a virtual studio system method. Background technique [0002] After nearly ten years of development, virtual studio technology has made great progress, and now it is gradually entering the application stage. However, as one of the key technologies in the virtual studio system, camera motion parameter measurement and tracking technology, although many manufacturers at home and abroad have proposed a variety of solutions, there are more or less serious defects, which restrict the virtual studio. The actual application effect of the system is briefly described as follows: [0003] 1. Mechanical tracking: The basic principle is to mechanically transform the pan / tilt, tripod and r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/222H04N5/225
Inventor 黄民主刘林运阴建林肖仲坤陈粤温晓晴雷粉霞
Owner 西安宏源视讯设备有限责任公司
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