A method and system for calculating the pose of a display screen
A computing method and computing system technology, applied in navigation computing tools, camera devices, etc., can solve problems such as screen lock failure, inaccurate pose estimation, etc., achieve the effect of wide application range, great flexibility, and avoid algorithm failure
Active Publication Date: 2020-11-13
BEIJING ZHIZHEN ZHIZAO TECH CO LTD
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[0003] In the prior art, marker recognition methods based on specific codes are usually greatly affected by external factors such as distance, angle, and illumination, which can easily lead to problems such as screen lock failure and inaccurate pose estimation.
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[0045] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0046] Such as figure 1 As shown, it is a schematic flowchart of a display pose calculation method provided by an embodiment of the present invention. In a system similar to an augmented reality system or a mixed reality system, the scene is displayed at a fixed viewing angle to achieve the effect of a 3D virtual model protruding from the screen. In related applications that allow others to watch and share the human-computer interaction experience process in real time from a third-party perspective, or record the interactive process of operating a virtual scene, it is often necessary to extract and identify the display area of the display screen and give its relative position to the shooting device. positional tra...
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The invention relates to pose calculation method and system of a display screen. The method includes steps of: 1) performing enlargement treatment and convex hull detection to an acquired multi-framemoving foreground image in the range of the display screen, and selecting a convex hull which has the maximum area; 2) according to the distances between the convex hull points and edges of the display screen, dividing all the convex hull points into n groups; 3) performing linear fitting respectively to each group of the convex hull points; 4) acquiring pixel coordinates of all of the intersection points; 5) acquiring the world coordinates of the corner points of the display screen; 6) according to all of the pixel coordinates and world coordinates, acquiring the pose of the display screen relative to a photographing device. The method and the system have high flexibility in application and avoid problems of algorithm failure caused by mis-recognition of a marker in a marker-based method.Even the angle between the photographing device and the display screen is larger and the distance between same is longer, the method and system can accurately recognize the pose. The method and system have a broader application range.
Description
technical field [0001] The invention relates to the field of computer vision applications, in particular to a method and system for calculating the pose of a display screen. Background technique [0002] At present, in order to achieve the effect of displaying the device scene with a fixed viewing angle so as to achieve the effect that the 3D model protrudes from the screen, a method of placing several markers on the display area of the display device to assist identification is usually adopted. This method obtains the position of the marker by identifying specific encoding types and markers with different encodings, and realizes the detection and locking and pose estimation of the display device. [0003] In the prior art, marker recognition methods based on specific codes are usually greatly affected by external factors such as distance, angle, and illumination, which can easily lead to problems such as screen lock failure and inaccurate pose estimation. Contents of th...
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IPC IPC(8): G01C11/02G01C21/20
CPCG01C11/02G01C21/20
Inventor 齐立文王海马康智吴全磊郭志奇
Owner BEIJING ZHIZHEN ZHIZAO TECH CO LTD