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KR-20260064782-A - RESPIRATION ANALYSIS SYSTEM USING THERMAL IMAGE CAMERA

KR20260064782AKR 20260064782 AKR20260064782 AKR 20260064782AKR-20260064782-A

Abstract

A thermal imaging camera-based respiration analysis system is disclosed. The thermal imaging camera-based respiration analysis system includes: a thermal imaging screen installed on the side of a subject; a thermal imaging camera that acquires a thermal image of a preset area from the front of the thermal imaging screen; and a respiration analysis device that performs a respiration analysis of the subject based on the thermal image.

Inventors

  • 홍민
  • 최민형
  • 이도경
  • 최재성
  • 최성준

Assignees

  • 순천향대학교 산학협력단

Dates

Publication Date
20260508
Application Date
20241029

Claims (5)

  1. A thermal imaging screen installed on the side of the subject; A thermal imaging camera that acquires a thermal image of a preset area from the front of the above-mentioned thermal imaging screen; and It includes a breath analysis device that performs breath analysis of the subject based on the above thermal image, and The above breath analysis device An interest region setting unit that separates the above thermal image frame by frame and sets a respiration-related interest region based on a lung function test process; A respiration-related graph generation unit that generates a graph containing respiration-related information based on frame-by-frame pixel value changes of a thermal image in the above-mentioned respiration-related interest region; and Includes an information providing unit that visually provides the above graph and respiration-related information included in the graph. Thermal imaging camera-based respiration analysis system.
  2. In paragraph 1, It further includes a pixel analysis unit that compares the pixels of the current frame with the pixels of the previous frame and counts the number of pixels whose pixel value brightness has increased, and the graph generation unit generates the graph based on the pixel comparison result. Thermal imaging camera-based respiration analysis system.
  3. In paragraph 2, The pixel analysis unit above The number of pixels with increased brightness of the above pixel values is counted to measure the spread information of the exhaled air, and in the case of real-time measurement, the spread information of the above exhaled air is fed back to the interest region setting unit. Generating exhaled air density information by measuring the color change amount of the pixels in the current frame and the previous frame. Thermal imaging camera-based respiration analysis system.
  4. In paragraph 1, The above-mentioned respiration-related information includes respiration pattern information, respiration rate, and average respiration volume during exhalation. Thermal imaging camera-based respiration analysis system.
  5. In paragraph 1, The above breath analysis device The control unit further includes a first operation mode for setting an initial region of interest with a fixed position and size, a second operation mode for expanding the initial region of interest in a longitudinal or transverse direction, and a third mode for shrinking the initial region of interest in a longitudinal or transverse direction, and determines at least one of these modes. The above-mentioned region of interest setting unit adaptively sets a region of interest according to the above-mentioned operation mode, and The region of interest of the second operation mode described above includes a first region of interest extended in the longitudinal direction from an area close to the subject's mouth, and a second region of interest extended in the transverse direction based on a pulmonary function test process. Thermal imaging camera-based respiration analysis system.

Description

Respiration Analysis System Based on Thermal Imaging Camera The present invention relates to a respiration detection system, and more specifically, to an object recognition system for respiration detection based on a thermal imaging camera. Breath analysis or respiratory identification may be necessary for sleep tests to identify sleep apnea and for pulmonary function tests to identify lung diseases. In this context, pulmonary function testing is a test that allows for the identification of the pathophysiology of respiratory diseases by examining the lung function of patients suspected of having respiratory diseases. Pulmonary function testing according to conventional technology requires contact between a medical professional and the test subject, and the subject undergoes the test using measuring equipment in a pulmonary function testing laboratory. In this case, pulmonary function testing according to conventional technology may be performed using a spirometer, which may result in inconvenience and increased costs due to the replacement of the mouthpiece. Therefore, a method is required to minimize contact between the test subject and the medical professional for pulmonary function tests. Meanwhile, respiratory analysis for diagnosing sleep apnea requires a sleep testing environment and equipment. Furthermore, respiratory analysis to aid in pulmonary function diagnosis involves measuring spirometry—specifically, the subject exhaling as much as possible through the mouth (forced expiration)—rather than the natural breathing pattern during sleep. Therefore, a method suitable for aiding pulmonary function diagnosis that minimizes environmental constraints is required. Figure 1 shows a schematic configuration of a breath analysis device according to an embodiment of the present invention. FIG. 2 is a diagram illustrating the configuration of a breath analysis system according to an embodiment of the present invention. Figure 3 is a block diagram showing the configuration of the breath analysis device illustrated in Figure 2. Figure 4 is a diagram illustrating the configuration of the preprocessing unit shown in Figure 3. FIG. 5 is a flowchart illustrating a breath analysis method according to an embodiment of the present invention. FIG. 6 shows an example of a graph containing respiration-related information according to one embodiment. FIG. 7 is a diagram illustrating the operation mode and region of interest setting according to one embodiment. FIG. 8 is a diagram illustrating a breath measurement method according to one embodiment. Structural or functional descriptions are provided merely for the purpose of illustrating embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms and are not limited to the embodiments described herein. Embodiments according to the concept of the present invention may be subject to various modifications and may take various forms; therefore, embodiments are illustrated in the drawings and described in detail in this specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes modifications, equivalents, or substitutions that fall within the spirit and scope of the present invention. Terms such as "first" or "second" may be used to describe various components, but said components should not be limited by said terms. For the sole purpose of distinguishing one component from another, for example, without departing from the scope of rights according to the concept of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. Conversely, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Expressions describing the relationships between components, such as "between," "exactly between," or "directly adjacent to," should be interpreted in the same way. The terms used herein are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to specify the existence of the described features, numbers, steps, actions, components, parts, or combinations thereof, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Unless otherwise