Rapid calibration method and rapid calibration system for inertial motion capture attitude

Abstract

The invention discloses a rapid calibration method and a rapid calibration system for inertial motion capture attitude. The method comprises the following steps: acquiring attitude data of a capturedobject in a calibration attitude by using an attitude capture module; obtaining gravity acceleration and the degree of jitter of a wearing portion of the attitude capture module according to the acquired attitude data so as to adjust the attitude and the degree of jitter of the captured object according to the obtained gravity acceleration and the degree of jitter until the captured object poses as a calibration attitude and the degree of jitter of the captured object does not exceed a preset threshold; calculating to obtain a first transformation relationship according to the adjusted attitude data of the attitude capture module; calculating to obtain a second transformation relationship according to the adjusted attitude data of the attitude capture module and the first transformation relationship; and performing a first calibration on the attitude data output by the attitude capture module according to the second transformation relationship. The rapid calibration method and rapid calibration system for inertial motion capture attitude have the advantages of simple operation, high speed and high precision, and can be widely applied to the field of motion capture.

Description

technical field [0001] The invention relates to the field of motion capture, in particular to a rapid calibration method and system for inertial motion capture gestures. Background technique [0002] Motion capture technology is a technology that collects the motion information of the captured object through various devices and converts it into simple and readable information, mainly including mechanical motion capture, acoustic motion capture, electromagnetic motion capture, optical motion capture and inertial motion capture. There are several methods of motion capture. Considering the comprehensive use environment, use complexity, price and capture accuracy, inertial motion capture technology has the greatest advantage. Inertial motion capture systems generally include a controller module, multiple pose capture modules, and a data terminal; when in use, the pose capture module needs to be worn on the main bone parts of the wearer. It is necessary to calibrate the attitud...

AI Technical Summary

Problems solved by technology

The calibration of the existing inertial motion capture technology generally adopts a countdown method, which does not judge the posture of the wearer or requires additional hardware equipment to prompt, and generally requires the wearer to pose in multiple different postures, which makes the existing calibration method It takes a long time and the calibration accuracy is not high: because the wearer’s posture always deviates from the standard posture, and the more postures the wearer makes, the greater the deviation may be; and because the calibration time is long, the wearer will inevitably have jitter, resulting in a decrease in calibration accuracy, and existing methods do not take this jitter into account

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