Noncontact Respiratory Volume Measurement Using Depth Camera

• Main Authors: Jia-Lin Liou, 劉嘉麟
• Other Authors: 洪一平
• Format: Others
• Language: en_US
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/64011430563257356131

碩士 === 國立臺灣大學 === 資訊工程學研究所 === 100 === Breathing is important. In this study, a noncontact respiration measurement technique using depth cameras, Kinect camera, is developed to measure respiratory volume from the morphological changes of chest wall region. Then, user’s breathing status, i.e. the respiratory rate, respiratory depth, and inhale-to-exhale ratio, and breathing methods, i.e. thoracic breathing and abdominal breathing, can be measured. For measuring the chest wall movements, a dynamic thoracic and abdominal region of interest (ROI) tracking technique is used. In this study, two frameworks of noncontact respiratory measurement are proposed. One is a single-sided depth camera system to measure respiratory volume in sitting and lying postures. The other is a double-sided depth camera system to measure respiratory volume in standing posture. Through experiments, the system was evaluated in three different wearing conditions (necked, thin clothing, and thick coat) and three different postures (sitting, lying, and standing). Among these experiments, the measured respiratory volumes are compared by our method and a reference device, spirometer. Finally, three noncontact respiratory measurement applications are developed, including a Mao-Kung Ting system, an Intensive Care Unit (ICU) respiratory monitoring system, and a standing meditation system. In conclusion, a low-cost and easy-operating noncontact regional respiratory measurement system is developed, and the contribution of this study is to develop a system which could help users aware of their breathing conditions, and toward the ultimate goal of preventive medicine.