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Image preprocessing method for face recognition surveillance video

A technology for image preprocessing and monitoring video, applied in character and pattern recognition, instruments, computer parts, etc., to improve efficiency, solve the contradiction between communication bandwidth and image clarity, and reduce the amount of data

Inactive Publication Date: 2018-12-07
郑永春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to provide an image preprocessing method for face recognition monitoring video to solve the problem of how to quickly and accurately monitor mobile crowds with high-resolution video in the prior art

Method used

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  • Image preprocessing method for face recognition surveillance video
  • Image preprocessing method for face recognition surveillance video
  • Image preprocessing method for face recognition surveillance video

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Embodiment

[0030] An image preprocessing method of a face recognition monitoring video according to an embodiment, divides the face recognition system into two parts: a front-end monitoring device and a control platform according to functions and complexity: the front-end monitoring device performs high-resolution digital video image preprocessing and The background face recognition control platform enables the front end to process the video image at the place where the image is generated before transmission, screen out valuable face images, filter out more than 99.9% of useless data, and control the PTZ and optical lens, Capture high-definition face images, and only send valuable images to a remote background server through wired or wireless channels for further processing and recognition of face images.

[0031] A method for image preprocessing of face recognition surveillance video, such as image 3 , collect the real-time digital video, preprocess the original image in the real-time ...

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Abstract

The invention provides an image preprocessing method for a face recognition surveillance video. The image preprocessing method comprises acquiring a real-time digital video; preprocessing an originalimage in the real-time digital video; screening out face images available for comparison recognition; separating the foreground from the background of the original image by using differential technology; separating the foreground image from the background image in the original image to obtain the foreground image; convoluting the foreground image and a high-pass filter template to find the boundary contour of an object; according to the continuity and the closure of the contour, separating independent objects; normalizing the image of each object; and convoluting the normalized image and a face feature template to obtain an object image. The method can extract face images from the ultrahigh-resolution digital video image in real time, provides high-valued face images for a remote background face recognition server or a portable device, greatly reduces the amount of data to be transmitted, and improves face recognition accuracy and speed of a surveillance system.

Description

technical field [0001] The invention relates to an image preprocessing method for face recognition monitoring video. Background technique [0002] Existing face recognition servers can compare two face images, usually a face image captured in real time, and compare it with a standard ID photo in the database to find out who the person is now, such as an airplane At airports and high-speed rail stations, passengers are required to take a photo of the security camera for a long enough time, and then compare it with the submitted ID card to confirm that it is the same person. [0003] However, in more application scenarios, such as surveillance systems in public places and law enforcement cameras, it is impossible to require everyone passing by to stand in front of the camera to take a standard photo, and then wait for dozens of seconds for the server to identify. On the monitoring system and law enforcement cameras, the images obtained by the cameras are intricate and changin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/54
CPCG06V40/161G06V40/168G06V10/20
Inventor 郑永春周飞标陈建苗胡林孙莉章立杨
Owner 郑永春
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