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A heart rate detection method and device

A detection method and technology of a detection device, which are applied in the measurement of pulse rate/heart rate, diagnostic record/measurement, instruments, etc., can solve the problems of detection failure, improve the efficiency and accuracy of heart rate detection, and disadvantage, so as to improve the hit rate and efficiency. , Improve user experience, improve the effect of accuracy

Active Publication Date: 2020-11-06
TCL CORPORATION
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the embodiment of the present invention is to provide a heart rate detection method, aiming to solve the current heart rate detection system based on skin color changes, the heart rate measurement is complicated, and the robustness of some side face images is poor, and detection failures may occur , which is not conducive to improving the efficiency and accuracy of heart rate detection

Method used

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  • A heart rate detection method and device

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Embodiment 1

[0033] figure 1 It is an implementation flow chart of the heart rate detection method provided by the embodiment of the present invention, and is described in detail as follows:

[0034] In step S101, the user's image is collected;

[0035] In step S102, in the image, facial feature points are extracted;

[0036] Wherein, in the multi-frame images, the Haar feature extraction algorithm is used to capture the face area in the image to extract facial features.

[0037] In step S103, according to the extracted facial feature points, select a facial area with uniform illumination distribution;

[0038] In step S104, image smoothing processing is performed on the selected facial area, and the heartbeat frequency is detected according to the skin color change of the facial area after the image smoothing processing.

[0039] According to the extracted facial feature points, select the image connected regions corresponding to the left cheek, right cheek, and forehead in the image; ...

Embodiment 2

[0044] figure 2 It is the implementation flowchart of step S103 of the heart rate detection method provided by the embodiment of the present invention, and is described in detail as follows:

[0045] In step S201, according to the facial feature points extracted and the distribution positions of the facial feature points, the image connected regions corresponding to the left cheek, right cheek and forehead are selected in the image;

[0046] In step S202, a preset range in the center of the image connected region is selected as a facial region with uniform illumination distribution.

[0047] In the embodiment of the present invention, the preset range of the center of the image connected area is selected as the facial area with uniform illumination distribution, which avoids the phenomenon of detection failure due to obvious facial curves and large differences in color changes of images collected by various parts, which is easy to Improve the accuracy of the heart rate detec...

Embodiment 3

[0049] The embodiment of the present invention describes the implementation process of performing image smoothing processing on the selected facial area, which is described in detail as follows:

[0050] Using a Gaussian low-pass filter to smooth the extracted skin color area, and detect the heartbeat frequency according to the skin color change of the smoothed facial area of ​​the image; or,

[0051] The extracted skin color area is smoothed by median filtering, and the heartbeat frequency is detected according to the skin color change of the smoothed image.

[0052] In the embodiment of the present invention, the image smoothing process is performed on the selected facial area, which further avoids the phenomenon that the color of the image collected by each part has a large difference due to the obvious facial curve, and the phenomenon of detection failure occurs, and further improves the accuracy of the heart rate detection system. sex.

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Abstract

The present invention is applicable to the field of heart rate detection, and provides a heart rate detection method and device. The heart rate detection method includes: collecting images of users; extracting facial feature points from the images; and selecting illumination according to the extracted facial feature points. A uniformly distributed facial area; image smoothing is performed on the selected facial area, and the heartbeat frequency is detected according to the skin color change of the smoothed image. The invention solves the problem that the robustness of some side face images is poor, and detection failure occurs, which is not conducive to improving the efficiency and accuracy of heart rate detection. The beneficial effect lies in the following two aspects. On the one hand, it does not require strict frontal shooting of the tester’s face, which improves the hit rate and efficiency of heart rate detection; on the other hand, based on the extraction of facial feature points, it can effectively extract stable uniform The illuminated area improves the accuracy of the heart rate detection system and at the same time improves the user experience.

Description

technical field [0001] The invention belongs to the field of heart rate detection, in particular to a heart rate detection method and device. Background technique [0002] With the gradual development of medical level and information processing level, intelligent medical care has received extensive attention. The detection of various physiological signals and the prevention of diseases have become the hotspots of current research. At present, in terms of detecting heart rate signals, the most convenient application is the heart rate detection system based on skin color changes. [0003] However, the current heart rate detection system based on skin color changes is complex in heart rate measurement, and is less robust to some side face images, and detection failures may occur, which is not conducive to improving the efficiency and accuracy of heart rate detection. The reason is that the current heart rate detection system based on skin color changes has the following defic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/024A61B5/1171G06K9/00G06K9/46G06K9/44
CPCA61B5/0077A61B5/024A61B5/1176A61B5/72G06V40/165G06V40/171G06V40/168G06V10/34G06V10/56
Inventor 李敬源
Owner TCL CORPORATION
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