Motion posture recognition method and device of capture ball

Abstract

The invention discloses a motion posture recognition method and device of a capture ball. The method comprises the following steps: acquiring three-dimensional coordinates of all recognizable reflective mark points in a motion space, matching all the reflective mark points to obtain a plurality of matching points on a capture ball, and calculating to obtain a ball center coordinate of the capture ball according to the three-dimensional coordinates of the matching points; and then calculating the motion attitude information of the capture ball in the motion space. Herein, the matching method between the recognizable reflective mark points and the capture ball is added in the process of acquiring a plurality of matching points on the capture ball, wherein an iterative algorithm for calculating the center coordinates of the capture ball is introduced in the process of acquiring the center coordinates of the capture ball; therefore, the situation of misrecognition caused by wrong matching of the reflective mark points and increase of the coordinate error of the ball center is avoided, and the recognition degree of the system on the captured ball is improved. Meanwhile, when the method and the device are adopted, few matching points on the capture ball can be adopted for motion posture recognition, so that the calculation amount is reduced, the calculation speed is improved, and convenience is brought to practical application.

Description

Technical field [0001] The present invention relates to the field of optical motion capture, and more particularly to a motion attitude identification method of capturing balls and apparatus. Background technique [0002] In an existing optical motion capture system, it is generally transmitted by capturing reflective markers (Marker, which refers to the surface covering the label, common shapes, spherical and hemispherical, etc., often used in motion targets). Track tracking with trajectory tracking with movement attitude of achieving target objects. Usually, the plurality of reflective markers that are configured on the capture object can be captured (the rigid body here refers to the rear shape and the relative position of the shape and the size of the inner point in the motion and the internal point of the inner point. The constant object is an ideal model), each of which corresponds to a target site on the object. When tracking tracking of capture objects, the different targ...

AI Technical Summary

Problems solved by technology

[0004] (1) When recognizing the catching ball in the form of a rigid body, since there are a lot of reflective stickers on the catching ball to configure a large number of reflective marks, in order to fully recognize the motion posture of the catching ball, in the later stage of posture recognition and trajectory tracking process , to traverse the three-dimensional coordinates of each reflective mark, the calculation is huge, which will greatly affect the real-time motion gesture recognition and trajectory tracking effect of the catching ball

[0005] (2) The structure of the catching ball has a difference in size. A ball with a relatively large diameter will cause unpredictable occlusion of the reflective sticker during motion, which will affect the capture process and bring poor motion gesture recognition effect.

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