Breath tracking method based on thermal imaging technology

Abstract

A breath tracking method based on a thermal imaging technology presented by the invention mainly includes optimal quantization for a high-heat dynamic range scene, nasal region tracking, and breath estimation through heat voxel integration. First, the heat distribution sequence is optimally quantized by searching for a heat range of interest containing the temperature distribution of the overall face in each frame. Then, the heat distribution sequence is compared with a normal heat image under combined artifacts to get different shapes of the nostrils from an image based on heat gradient, and feature points representing the moving track of the nostrils are collected using a converted image. Finally, features are extracted by calculating the average value of heat distribution in a bounding box, and breath estimation is carried out through heat voxel integration. A thermal imaging system presented by the invention is not affected by lighting conditions, and the accuracy and stability of the nostril area tracking are improved. Moreover, the thermal imaging technology is of low cost, and a new possibility is opened up for a breathing rate monitoring device based on a smart phone.

Description

technical field [0001] The invention relates to the field of breathing tracking, in particular to a breathing tracking method based on thermal imaging technology. Background technique [0002] With the improvement of living standards, people's health awareness and health care requirements continue to strengthen, and people pay more and more attention to the early detection and early intervention of diseases, that is, to monitor the status of human health through real-time dynamic monitoring to prevent diseases before they happen. Among them, the respiratory monitoring function plays an increasingly important role in the fields of medical treatment, health care and fitness. It can be applied in the diagnosis and treatment of lung-related diseases, newborn care and sleep research, as well as in some wearable devices for the detection of breathing during exercise and sleep, and analyze the user's health by recording the user's exercise and sleep data situation. Studies have s...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of being affected by motion artifacts and respiratory dynamics amplification noise, the object of the present invention is to provide a breathing tracking method based on thermal imaging technology, first by searching for the heat of interest including the temperature distribution of the entire face of each frame Range, to optimally quantify heat distribution sequences, by obtaining different morphology of nostrils from thermal gradient-based images compared to normal thermal images under combined artifacts, using transformed images to collect feature points representing nostril motion trajectories , and finally features are extracted by computing the average of the thermal distribution in the bounding box, respiration estimation by thermal voxel integration

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