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Non-contact physiological parameter detection method, system and device

A non-contact technology for detection of physiological parameters, applied in the field of non-contact detection of physiological parameters, can solve problems such as inaccurate physiological parameters

Active Publication Date: 2017-02-15
珠海中科先进科技产业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] For this reason, the technical problem to be solved by the present invention lies in the non-contact physiological parameter detection method based on video images in the prior art, because the lack of data processing methods leads to inaccurate final detected physiological parameters, thereby providing a method that can extract Accurate non-contact physiological parameter detection method, system and device for physiological parameters

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  • Non-contact physiological parameter detection method, system and device

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Embodiment 1

[0113] This embodiment provides a non-contact physiological parameter detection method, such as figure 1 shown, including the following steps:

[0114] S1: Obtain digital video of the video capture area.

[0115] S2: Perform the following processing on each frame of image in the digital video:

[0116] S21: Extract all facial images included in the frame image.

[0117] S22: Calculating the RGB three-color mean value of each face image respectively.

[0118] S3: Obtain an original three-color mean value matrix according to the RGB three-color mean values ​​in each frame of image.

[0119] S4: Perform detrending processing, filtering processing, and normalization processing on the original three-color mean value matrix to obtain a preprocessed three-color mean value matrix.

[0120] S5: Extract physiological parameters from the preprocessed three-color mean matrix.

[0121] In the non-contact physiological parameter detection method described in this embodiment, the RGB th...

Embodiment 2

[0143] On the basis of Example 1, the non-contact physiological parameter detection method described in this example, such as figure 1 As shown, the step S21 specifically includes the following steps:

[0144] S211: Establish a color space coordinate system, each coordinate point in the color space coordinate system corresponds to each point in the coordinate system where the frame image is located; and perform image color space transformation on the frame image to obtain the frame image The YCrCb color space image under the color space coordinate system.

[0145] S212: Based on the relationship between the brightness value and the skin color value of each pixel in the YCrCb color space image, obtain rough coordinate areas where all facial images in the YCrCb color space image are located.

[0146] S213: According to the rough coordinate area, calculate and determine the reference position coordinates and effective area coordinates of each facial image in the YCrCb color space ...

Embodiment 3

[0162] On the basis of Embodiment 1 and Embodiment 2, the non-contact physiological parameter detection method described in this embodiment, such as figure 1 As shown, specifically carry out the following processing for each face image in the described step S22:

[0163] S221: Perform RGB three-color separation on the intercepted facial image, and obtain matrix I of each independent color component i , wherein i=1 or 2 or 3, and the number n of pixels in the width direction and the number m of pixels in the length direction of the facial image are acquired.

[0164] S222: Use the following formula to respectively obtain the mean value of the RGB three-color components of each facial image of the frame image after being enlarged by 1000 times:

[0165]

[0166] It can be seen from the formula that in the non-contact physiological parameter detection method described in this embodiment, in the process of calculating the mean value of the color components, the relevant parame...

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Abstract

The invention relates to a non-contact physiological parameter detection method, system and device capable of detecting in real time and dynamically displaying human body physiological parameters. The preprocessing of trend term removal, filtering and normalization is carried out on each color component mean value matrix of a RGB (red, green, blue) image, the trend changes of data step property, upswept property, slantly downward property and longspan fluctuation, which are caused by background environment parameter changes are eliminated, and the antijamming capability of detection and the accuracy of the measured physiological parameters are improved. The consistency of positions and sizes of face images which are captured by front and rear frames is guaranteed, and noise interference produced by face image extraction is reduced to the greatest extent; through the amplification of skin color parameters when a RGB color component mean value is calculated, the difference value when the skin color changes along with the human body physiological activity is amplified, the loss of tiny useful signals in the data processing process is prevented, and the precision and the accuracy of extracting the human body physiological parameters are thus improved.

Description

technical field [0001] The invention relates to a non-contact physiological parameter detection method, system and device. Specifically, it relates to a non-contact physiological parameter detection method, system and device based on video images. Background technique [0002] By monitoring the physiological parameters of the human body, such as the monitoring of the heart rate signal, it is possible to understand the working conditions of the human cardiovascular system. In the medical field, the heart rate signal can be used to detect the potential risk of cardiovascular disease and provide preliminary reference data for treatment; in the field of fitness and sports medicine, the heart rate signal is also used to judge the fitness effect and reflect the exercise safety status of the tested person; In the field of driving, the heart rate signal can be used to understand the driver's cardiovascular function, fatigue, physical sub-health and the driver's psychological activi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/14A61B5/024A61B5/08A61B5/0205
Inventor 徐国卿张琦汪明周翊民宫凯陈炎峰
Owner 珠海中科先进科技产业有限公司
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