Marking system for human leg and foot multi-joint fine motion analysis and shank and foot segment division method

Abstract

The invention discloses a marking system for human leg and foot multi-joint fine motion analysis and a shank and foot segment division method, which comprises the shank and foot segment division method and the design of the marking system. The shank and the foot are divided into 12 segments including the shank, the heel, the scaphoid bone, the dice bone, the cuneiform bone, the inner side plantar part, the outer side plantar part, the big toe, the second toe, the third toe, the fourth toe and the fifth toe according to the anatomic forms of the shank, the foot bones and the joints of the human body, and joint movement of the shank and the foot can be comprehensively researched. The marking system comprises a technical marking point cluster system and an anatomic marking point system which are used for determining a technical coordinate system and a key anatomic position point of movement of each segment. According to the size and the shape of each segment, different technical marking point cluster systems are designed. The marking system provided by the invention comprises the marking points for preventing the points from being lost and falling and the marking point cluster, has relatively good human body fitness, and can effectively improve the capture precision.

Description

technical field [0001] The invention relates to the field of three-dimensional motion capture and analysis, in particular to a marking system for fine motion analysis of multi-joints of human legs and feet and a method for dividing leg and foot segments. Background technique [0002] Analyzing the laws of human joint motion and revealing the phenomenon and nature of human motion can provide an important scientific basis for the clinical diagnosis of human joint systems and sports rehabilitation. There are many bones in the human foot, including 26 bones and 33 joints. The bones are small in size and irregular in shape. Therefore, it is extremely challenging to accurately and effectively quantify the kinematic characteristics of the calf and foot joints during normal physiological movements. [0003] Literature research shows that the current common method for studying human joint motion is to use infrared optical motion capture system, which uses infrared reflective material...

AI Technical Summary

Problems solved by technology

These studies mainly divide the foot into several simpler segments based on the multi-rigid body model. Since the human foot has 33 joints, including some small joints composed of irregularly shaped bones, the existing division methods are all It is impossible to conduct a detailed analysis of its motion laws, which severely limits the fine research on the bones and joints of the human foot

At the same time, most of the existing human joint kinematics experiments use plastic balls coated with reflective materials to make reflective balls, which are directly attached to the skin surface or plastic substrates are used to paste the skin surface and reflective balls are pasted on the substrate. Lost point caused by occlusion of one part or large error caused by poor fit between the substrate and the surface of the human body

In addition, the use of double-sided adhesive to connect with the surface of the skin is also prone to drop problems

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