在临床上医师通过对踝关节的 X线拍片和经验判断踝关节功能性不稳，该方法增加了临床诊断成本和诊断门槛。为此，研发一种基于三维测量与重建模型的踝关节功能评价系统。该系统采用正反结构光投影技术，通过结构光正反条纹图像检测结构光边缘并实现亚像素定位。利用主动立体视觉原理实现踝关节姿势的三维测量与三维重建，并根据三维重建模型分析踝关节功能性不稳。实验结果表明，该系统可有效地分析踝关节功能性不稳，为早期发现踝关节功能性不稳和康复医疗提供有利的诊断与决策依据。%Clinicians diagnose functional ankle instability through X-ray films and experience,which increases the clinical diagnosis cost and diagnostic threshold.For this problem,this paper develops an ankle function evaluation system based on the three-dimensional (3 D ) measurement and reconstruction model.The system adopts the positive-negative structured light projection technology and detects the structured light edge and achieves sub-pixel localization through the structured light positive-negative stripe images.It uses the sub-pixel position of the structured light edge and active stereo vision principle to realize the 3 D measurement and reconstruction of the ankle posture,and analyzes the ankle function instability through the 3 D reconstruction model.Experimental results show that the system can analyze and evaluate the ankle function instability effectively,and provide favorable diagnosis and decision-making basis for the early detection and rehabilitation treatment of ankle function instablity.
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