Daegu-Gyeongbuk Research Division, Electronics and Telecommunications Research Institute, Daegu, Korea.
Medical Device Development Center, Daegu-Gyeongbuk Medical Innovation Foundation(K-MEDI Hub), Daegu, Korea.
BMC Med Imaging. 2024 Oct 10;24(1):274. doi: 10.1186/s12880-024-01448-5.
This paper presents a non-contact and unrestrained respiration monitoring system based on the optical triangulation technique. The proposed system consists of a red-green-blue (RGB) camera and a line laser installed to face the frontal thorax of a human body. The underlying idea of the work is that the camera and line laser are mounted in opposite directions, unlike other research. By applying the proposed image processing algorithm to the camera image, laser coordinates are extracted and converted to world coordinates using the optical triangulation method. These converted world coordinates represent the height of the thorax of a person. The respiratory rate is measured by analyzing changes of the thorax surface depth. To verify system performance, the camera and the line laser are installed on the head and foot sides of a bed, respectively, facing toward the center of the bed. Twenty healthy volunteers were enrolled and underwent measurement for 100s. Evaluation results show that the optical triangulation-based image processing method demonstrates non-inferior performance to a commercial patient monitoring system with a root-mean-squared error of 0.30rpm and a maximum error of 1rpm ( ), which implies the proposed non-contact system can be a useful alternative to the conventional healthcare method.
本文提出了一种基于光学三角测量技术的非接触式、无约束呼吸监测系统。该系统由一个红绿蓝（RGB）相机和一个线激光器组成，安装在面对人体正面胸部的位置。与其他研究不同，该系统的基本思路是将相机和线激光器安装在相反的方向上。通过将所提出的图像处理算法应用于相机图像，提取激光坐标，并使用光学三角测量法将其转换为世界坐标。这些转换后的世界坐标表示人体胸部的高度。通过分析胸部表面深度的变化来测量呼吸率。为了验证系统性能，将相机和线激光器分别安装在床的头部和脚部侧面，朝向床的中心。招募了 20 名健康志愿者进行了 100 秒的测量。评估结果表明，基于光学三角测量的图像处理方法的性能不逊于商业患者监测系统，其均方根误差为 0.30rpm，最大误差为 1rpm（ ），这意味着所提出的非接触式系统可以作为传统医疗保健方法的有用替代方案。
