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Joint rotation center optimization method and equipment based on motion capture point cloud

A technology of rotation center and motion capture, which is applied in the field of motion capture and human musculoskeletal modeling, and can solve problems such as sensitivity to errors in pasting points

Active Publication Date: 2022-05-31
THE SECOND PEOPLES HOSPITAL OF SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that joint motion parameters calculated based on marker points are sensitive to pasting point errors and have large errors, and further proposes a joint rotation center optimization method, storage medium and equipment based on motion capture point clouds

Method used

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  • Joint rotation center optimization method and equipment based on motion capture point cloud
  • Joint rotation center optimization method and equipment based on motion capture point cloud
  • Joint rotation center optimization method and equipment based on motion capture point cloud

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specific Embodiment approach 1

[0025] This embodiment is a joint rotation center optimization method based on motion capture point cloud. The present invention combines the data of static standing and dynamic walking states at the same time to optimize the joint rotation center, and record the two bones connected to the optimized joint as the first bone and the second bone, the knee joint is taken as an example for illustration, the first bone and the second bone are femur bone and calf bone respectively.

[0026] It should be noted that the present invention is not limited to the knee joint, but also applicable to other joints, such as hip joints, shoulder joints, elbow joints and the like. In the case of the elbow joint, the first and second bones are the arm bone of the upper arm and the arm bone of the lower arm, respectively.

[0027] Taking the knee joint as an example, the joint rotation center optimization method based on the motion capture point cloud includes the following steps:

[0028] S1. Pas...

specific Embodiment approach 2

[0038] This embodiment is a storage medium, and at least one instruction is stored in the storage medium, and the at least one instruction is loaded and executed by a processor to implement the method for optimizing the joint rotation center based on motion capture point cloud.

[0039] It should be understood that any method corresponding to the description herein may be provided as a computer program product, software or computerized method, which may include a non-transitory machine-readable medium having stored thereon instructions, which may be used to program A computer system, or other electronic device, to perform a process. The storage medium may include, but not limited to, a magnetic storage medium, an optical storage medium; the magneto-optical storage medium includes: a read-only memory ROM, a random access memory RAM, an erasable programmable memory (for example, EPROM and EEPROM) and a flash memory layer; or Other types of media suitable for storing electronic i...

specific Embodiment approach 3

[0040] This embodiment is a joint rotation center optimization device based on a motion capture point cloud. The device includes a processor and a memory. It should be understood that it includes any device including a processor and a memory described in the present invention. The device may also include other signals or Units and modules that command display, interaction, processing, control, etc., and other functions;

[0041] At least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor to implement the method for optimizing the joint rotation center based on the motion capture point cloud.

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Abstract

The invention discloses a joint rotation center optimization method and equipment based on motion capture point cloud, and belongs to the technical field of motion capture and human muscle-bone modeling. The problem that joint motion parameters calculated based on mark points are sensitive to point pasting errors and have large errors is solved. According to the method, based on the acquired mark point data of the optimized joint and the first bone and the second bone which are respectively connected with the optimized joint in the relative static state and the relative motion state, the mark point data of the first bone in the relative motion state are superposed on the mark point data in the relative static state; based on the corresponding rotation and translation relation, the motion trail of the mark point data is converted into rotation motion of the first bone which is kept still and the second bone around the first bone through the optimized joint; and overlapping the second bone mark point of the current frame with the mark point corresponding to the second bone of the previous frame, and converting the rotation centers of the rotation translation matrixes of all adjacent two frames in the complete gait cycle into an optimization problem to realize optimization. The method is mainly used for joint rotation center optimization.

Description

technical field [0001] The invention specifically designs a joint rotation center optimization method, which belongs to the technical field of motion capture and human musculoskeletal modeling. Background technique [0002] Motion capture and musculoskeletal modeling are the most common technologies used to evaluate human motion characteristics. At present, it is widely used in the evaluation of sports performance, the functional evaluation of orthopedic diseases, the production of film animation and other fields. The implementation of the evaluation is mainly by pasting the optical reflective ball on the bony landmarks of the human body, and capturing the three-dimensional space coordinates of the reflective ball through the motion capture system, so as to calculate the joint movement angle and other parameters according to the spatial coordinates of the reflective ball. There are two main ways to calculate joint angles. One is to calculate the angle between line segments ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06V40/20G06V40/10G06T7/33G06T7/73G06T7/246G06T17/00
CPCG06T7/344G06T7/75G06T7/251G06T17/00G06T2207/10016G06T2207/10028G06T2207/30196G06T2207/30241
Inventor 蒯声政张睿陈姿宇颜滨周文钰李文翠
Owner THE SECOND PEOPLES HOSPITAL OF SHENZHEN
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