Motion function evaluation method based on novel redundant mark point set

A motion function evaluation and marking point technology, which is applied in the field of motion capture, can solve problems such as too few marking points, high requirements for marking point position accuracy, and inability to accurately evaluate motion functions, so as to achieve the goal of improving accuracy and reducing positional accuracy Requirements, the effect of improving efficiency

Pending Publication Date: 2022-06-07
THE SECOND PEOPLES HOSPITAL OF SHENZHEN
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing motor function evaluation method still has high requirements for the position accuracy of placing markers and the inability to accurately evaluate motor function due to too few marker points, and proposes a new redundant marker based Point-set motor function assessment method

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  • Motion function evaluation method based on novel redundant mark point set
  • Motion function evaluation method based on novel redundant mark point set
  • Motion function evaluation method based on novel redundant mark point set

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specific Embodiment approach 1

[0028] Embodiment 1: The specific process of a motor function evaluation method based on a novel redundant marker point set in this embodiment is as follows:

[0029] Step one, as figure 2 , at the spinous processes of the first, third, fifth, seventh, ninth, eleventh, and twelve vertebrae (i.e. T1, T3, T5, T7, T9, T11, T12) of the subject's chest, the first and second lumbar , the spinous process of the third, fourth and fifth vertebrae (ie L1, L2, L3, L4, L5), the spinous process of the first sacral vertebra (ie S1), the skin surface of the pelvis, thigh, calf and foot paste optical markers point;

[0030] The optical markers pasted on the skin surface of the subject's pelvis include: the left anterior superior iliac spine is recorded as LASI, the left posterior superior iliac spine is recorded as LPSI, the highest point of the left iliac crest is recorded as LIC, and the right anterior superior iliac spine is recorded as LIC. The spine is recorded as RASI, the right post...

Embodiment

[0052] according to figure 1 The standard paste method shown and figure 2 The improved sticking method sticks the marker points (optical reflective balls or infrared light emitters) on the skin surface of the subject corresponding to the bony markers and the number and placement positions of the redundant marker points recommended by the present invention. The MotionAnalysis motion capture system was used to capture the three-dimensional coordinate change trajectory of the above-mentioned optical markers during the subjects' daily activities (such as walking, going up and down steps, etc.). On the basis of the standard model mocap in the Anybody model library, the spinal rhythm constraints fixed between the vertebral bodies of the spine are removed, and the drive model is constructed by the marker point pasting method described in the specific embodiment, so as to realize quantitative calculation of the spine, pelvis and lower limbs. The above-mentioned joint motion angles i...

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Abstract

The invention discloses a motion function evaluation method based on a novel redundant mark point set, and relates to the field of motion capture. The invention aims to solve the problems that the exercise function evaluation method has high requirements on the accuracy of the position of a mark point and the exercise function cannot be accurately evaluated due to too few mark points. The method comprises the following steps: pasting redundant optical marking points on the first, third, fifth, seventh, ninth, eleventh and twelfth vertebral spinous processes of the chest of a subject, the first, second, third, fourth and fifth vertebral spinous processes of the waist, the first sacral vertebral spinous process, pelvis, thigh, shank and foot skin; capturing a space coordinate change track of each optical mark point in daily activities of the subject; removing fixed spine rhythm constraints between spine vertebral bodies, and constructing a driving model by using a mark pasting method; and a space coordinate change track driving model is utilized to obtain joint movement angles of the spine, the pelvis and the lower limbs in different daily activities. The method can be used for evaluating the motion function of osteoarticular diseases.

Description

technical field [0001] The invention relates to the field of motion capture, in particular to a motion function evaluation method based on a novel redundant marker point set. Background technique [0002] Motion capture and musculoskeletal modeling are the most common techniques for evaluating 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. Among them, the functional quantitative evaluation of orthopedic diseases is the most important application in medicine. The specific process is mainly to paste optical markers (including passive reflective balls and active infrared emitters) on the bony markers on the skin surface of the evaluation object. , and then capture the spatial coordinate information of the optical marker points of the evaluation object under daily activities or specific actions. Then, through musculoskeletal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/11A61B90/00
CPCA61B5/1118A61B5/1127A61B90/39A61B2090/3904A61B2090/3937
Inventor 蒯声政张睿陈姿宇颜滨周文钰季润李文翠朱伟民
Owner THE SECOND PEOPLES HOSPITAL OF SHENZHEN
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