FIELD: medicine.
SUBSTANCE: group of inventions relates to medicine, namely to the monitoring of vital signs, and can be used to determine the respiration volume of an individual. Image data detected in the field of view is received. Plurality of alternating signals (S) is determined, and the alternating signals are determined based on motion vectors determined by the movement pattern, including information (R) on the subject’s respiratory signal, in different areas of the visual field from image data. Characteristic parameter (A) is determined, which corresponds to the respiration parameter on the basis of the alternating signal (S), which corresponds to the respiratory signal. Calibration value (V1, V2) is determined on the basis of the tidal volume measured during inspiration and/or expiration of the subject by measuring air flow or measuring air volume. Moreover, the maximum volume (V1) of a breath correlates with the corresponding maximum of the characteristic parameter (A). Minimum volume (V2) of inspiration is correlated with the corresponding minimum of the characteristic parameter (A) in order to determine the value (V1, V2) of the calibration. Moreover, the characteristic parameter (A) is scaled according to the determined value (V1, V2) of the calibration in order to continuously calculate the volume of respiration. Then, the subject's respiratory volume is calculated based on the calibration value (V1, V2) and at least one characteristic parameter (A). Moreover, a plurality of alternating signals (S) is weighted using a weighting factor corresponding to the field of view. Device for determining the respiratory volume of a subject comprises a processing unit for receiving image data, and for determining a plurality of alternating signals (S), including information (R) on the respiratory signal of the subject. And an analysis unit for determining the characteristic parameter (A) corresponding to the respiration parameter based on the alternating signal (S). Further, a calibration unit for determining the calibration values of the maximum inspiratory volume (V1) and the minimum inspiratory volume (V2) based on the tidal volume measured during the subject's inspiration and/or expiration. And a computing unit for calculating the subject's breathing volume based on the value (V1, V2) of the calibration and the characteristic parameter (A).
EFFECT: group of inventions provides a remote determination of the volume of breathing of the subject, where the region of interest is automatically determined and the subject’s breathing volume is determined frequently or continuously by remote measurement based on image data determined in the field of view, measurement calibration using air flow measurement or air volume measurement and correlation of these two measurements, without the need for additional markers or three-dimensional measurement of the subject.
11 cl, 8 dwg
