Camera positioning method and system for virtual studio
A technology of virtual studio and positioning method, which is applied in the field of camera positioning method and system, to achieve the effect of simple implementation and improved accuracy
Pending Publication Date: 2022-04-12
BEIJING HULIAN YIDA TECH
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[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings, provide a camera positioning method and system for a virtual studio, and solve the problem of camera initial position and attitude positioning
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[0018] Certain terms are used, for example, in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. The subsequent description of the specification is a preferred implementation mode for implementing the application, but the description is for the purpose of illustrating the general principle of the application, and is not intended...
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The invention discloses a camera positioning method and system for a virtual studio, and the method comprises the steps: enabling a plurality of mark points to be projected to a screen in an array manner through employing a round point as a mark point, building a world coordinate system through employing a center point of the screen as an original point, and calculating the spatial position of the projection mark points in the world coordinate system, using a calibrated camera to acquire an image of the mark point; and acquiring edge points of the dots of the image, calculating pixel coordinates of a circle surrounded by the edge points on the image by adopting a circle fitting mode after homography transformation, pairing the pixel coordinates of the mark points with the world coordinates of the mark points, and calculating the position and posture of the camera. According to the invention, the accurate position and orientation of the camera are obtained without the assistance of additional equipment, so that the screen obtains the projection image of the virtual scene, and the accuracy of the position of the camera and the projection model is improved.
Description
technical field [0001] The invention belongs to the technical field of positioning, and relates to a camera positioning method and system for a virtual studio. Background technique [0002] The virtual studio is based on the posture of the camera to project the existing virtual scene on the screen. During the shooting process, the user can be placed in the virtual scene without additional scene props. Different from the traditional prop scene layout or green screen scene, the virtual studio can provide users with scene interaction and feedback without using prop scenes. [0003] In recent years, virtual studio has been widely used in program production and advertising industry. The virtual studio uses multiple screens to create a cubic stage. According to the position of the camera and the projection model, the projection image of the virtual scene on the screen position is calculated, and the real scene is built without consuming resources, so that users and audiences can...
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IPC IPC(8): G06T7/80
Inventor 王澍胥海姚兴帅王璞星刘福菊刘星辰
Owner BEIJING HULIAN YIDA TECH