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Facial physiological information shielding method without changing video effect

A physiological information and video technology, applied in the field of personal information security, can solve the problems of biological information privacy leakage, etc., and achieve the effect of convenient and fast protection

Pending Publication Date: 2021-12-10
BEIJING UNIV OF TECH
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  • Description
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Problems solved by technology

Therefore, privacy such as personal physiological information is extremely easy to be leaked

Method used

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  • Facial physiological information shielding method without changing video effect
  • Facial physiological information shielding method without changing video effect
  • Facial physiological information shielding method without changing video effect

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] The flow chart of the facial physiological information shielding method that does not change the video effect is as follows: figure 1 As shown, it specifically includes the following steps:

[0029] Step 1, video frame processing.

[0030] First, frame-by-frame face detection is performed on the selected video, and the face of the person in the video can be determined after this step. Secondly, using the 68-feature principle of face key point detection to realize face feature point marking, it can automatically find the landmark feature positions of eyes, nose, mouth and face contour on the face based on the detected face.

[0031] Step two, determine the ROI.

[0032] Because selecting a reliable ROI is the key to extract physiological parameters based on the rPPG method, the detection of physiological parameters needs to extract the pulse wave BVP...

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Abstract

The invention provides a facial physiological information shielding method without changing a video effect belongs to the field of personal information safety, and the gradual maturation of a video-based non-contact physiological signal detection method makes it possible to obtain physiological parameter information such as personal heart rate, heart rate variability and the like only through a common video. Without knowing, personal physiological information may leak and be analyzed and utilized along with the propagation of the video. According to the facial physiological information shielding method, the video effect is not changed, non-contact physiological signal detection is interfered through single-channel periodic fuzzy filtering and single-channel periodic noise adding technologies, the rPPG principle and the detection process are fully considered, and traditional physiological signal detection methods such as ICA and CHROM can be rapidly and efficiently resisted.

Description

technical field [0001] The invention belongs to the field of personal information security, and relates to a facial physiological information shielding method without changing the video effect. Background technique [0002] The gradual maturity of video-based non-contact physiological signal detection methods makes it possible to obtain personal heart rate, heart rate variability and other physiological parameter information only through ordinary video. Without knowing it, personal physiological information may be leaked and analyzed as the video spreads. At present, in terms of physiological parameter detection methods, the blind source separation algorithm (ICA) and the chromaticity model-based method (CHROM) are mainly used at home and abroad. These two methods can accurately obtain physiological parameters such as personal heart rate and heart rate variability by analyzing ordinary face videos. If combined with methods such as skin segmentation, the heart rate error can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/32G06T5/00G06T7/90
CPCG06T7/90G06T5/70
Inventor 郑鲲申俊杰
Owner BEIJING UNIV OF TECH
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