Method and device for face liveness detection

Patent metadata

Field	Value
Publication number	US-10796178-B2
Application number	US-201715840863-A
Country	US
Kind code	B2
Filing date	Dec 13, 2017
Priority date	Dec 15, 2016
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A method for face liveness detection and a device for face liveness detection. The method for face liveness detection includes: performing an illumination liveness detection and obtaining an illumination liveness detection result; and determining whether or not a face to be verified passes the face liveness detection at least according to the illumination liveness detection result. Performing of the illumination liveness detection and obtaining of the illumination liveness detection result includes: acquiring a plurality of illumination images of the face to be verified, in which the plurality of illumination images are captured in a process of dynamically changing mode of illumination light irradiated on the face to be verified and are respectively corresponding to various modes of the illumination light; and obtaining the illumination liveness detection result according to a light reflection characteristic of the face to be verified in the plurality of illumination images.

First claim

What is claimed is:

1. A method for face liveness detection, comprising:
performing an illumination liveness detection and obtaining an illumination liveness detection result; and
determining whether or not a face to be verified passes the face liveness detection at least according to the illumination liveness detection result;
wherein performing of the illumination liveness detection and obtaining of the illumination liveness detection result comprise:
acquiring a plurality of illumination images of the face to be verified, wherein the plurality of illumination images are captured in a process of dynamically changing mode of illumination light irradiated on the face to be verified and are respectively corresponding to various modes of the illumination light; and
obtaining the illumination liveness detection result according to a light reflection characteristic of the face to be verified in the plurality of illumination images,

wherein the method further comprises:
performing an action liveness detection before determining whether or not the face to be verified passes the face liveness detection; wherein
performing of the action liveness detection comprises:
outputting an action instruction used for notifying the face to be verified to execute an action corresponding to the action instruction;
acquiring an action image of the face to be verified;
detecting the action executed by the face to be verified on the basis of the action image, so as to obtain an action detection result; and
obtaining an action liveness detection result according to the action detection result and the action instruction;

and
determining of whether or not the face to be verified passes the face liveness detection at least according to the illumination liveness detection result comprises:

determining whether or not the face to be verified passes the face liveness detection according to both of the illumination liveness detection result and the action liveness detection result.

2. The method for face liveness detection according to claim 1 , wherein
acquiring of the plurality of illumination images of the face to be verified comprises:
dynamically changing the mode of the illumination light irradiated on the face to be verified, and
capturing the plurality of illumination images, which are respectively corresponding to the various modes of the illumination light, of the face to be verified;

obtaining of the illumination liveness detection result according to the light reflection characteristic of the face to be verified in the plurality of illumination images comprises:
analyzing the plurality of illumination images,
acquiring the light reflection characteristic of the face to be verified in the plurality of illumination images, and
obtaining the illumination liveness detection result according to the light reflection characteristic; and

dynamically changing the mode of the illumination light irradiated on the face to be verified comprises:
dynamically changing color and/or position of the illumination light.

3. The method for face liveness detection according to claim 2 , wherein
light emitted from a display screen is used as the illumination light irradiated on the face to be verified; and
a mode of the light emitted from the display screen is dynamically changed by changing contents displayed on the display screen, so that the mode of the illumination light irradiated on the face to be verified is dynamically changed.

4. The method for face liveness detection according to claim 1 , wherein
number of times for performing the action liveness detection is increased by one for each performance of the action liveness detection, so as to obtain the number of times for performing the action liveness detection; and
after the action liveness detection result is obtained and in a case that the action liveness detection result indicates that the face to be verified fails to pass the action liveness detection, the method further comprises:
outputting first error information used for notifying a failure of the action liveness detection;
determining whether or not the number of times for performing the action liveness detection is greater than a first counting threshold; and
determining whether or not the face to be verified passes the face liveness detection at least according to the illumination liveness detection result in a case that the number of times for performing the action liveness detection is greater than the first counting threshold, and
performing the action liveness detection again in a case that the number of times for performing the action liveness detection is not greater than the first counting threshold, or performing the illumination liveness detection again in a case that the illumination liveness detection is performed before the action liveness detection and the number of times for performing the action liveness detection is not greater than the first counting threshold.

5. The method for face liveness detection according to claim 1 , further comprising:
determining whether or not a preset requirement of an image acquisition condition of the face to be verified is satisfied before performing the illumination liveness detection, so as to perform the illumination liveness detection in a case that the preset requirement of the image acquisition condition is satisfied, wherein
the image acquisition condition at least comprises one or more selected from a position of the face to be verified, a pose of the face to be verified and a size of the face to be verified in a real-time image acquired by an image acquisition device.

6. The method for face liveness detection according to claim 5 , wherein the image acquisition condition further comprises a blurriness of the real-time image and a shielding state of the face to be verified in the real-time image.

7. The method for face liveness detection according to claim 5 , wherein determining of whether or not the preset requirement of the image acquisition condition of the face to be verified is satisfied comprises:
adopting the image acquisition device to acquire the real-time image of the face to be verified;
displaying a reference part of the face to be verified in the real-time image and a reference region in real time; and
determining whether or not the preset requirement of the image acquisition condition is satisfied at least according to whether or not the reference part of the face to be verified in the real-time image falls within the reference region.

8. The method for face liveness detection according to claim 7 , wherein
the reference part of the face to be verified in the real-time image and the reference region are respectively the face to be verified in the real-time image and a face preview region; or
the reference part of the face to be verified in the real-time image and the reference region are respectively a specific facial part of the face to be verified in the real-time image and a targeted part region.

9. The method for face liveness detection according to claim 7 , wherein determining of whether or not the preset requirement of the image acquisition condition is satisfied at least according to whether or not the reference part of the face to be verified in the real-time image falls within the reference region comprises:
determining that the preset requirement of the image acquisition condition is satisfied in a case that the reference part of the face to be verified in the real-time image falls within the reference region; and
determining that the preset requirement of the image acquisition condition is not satisfied in a case that the reference part of the face to be verified in the real-time image fails to fall within the

Assignees

• Beijing Kuangshi Tech Co Ltd
• Megvii Beijing Technology Co Ltd

Inventors

• Fan Haoqiang
• Chen Keqing

Classifications

• G06V40/45

  Detection of the body part being alive · CPC title

• G06V40/166 Primary

  using acquisition arrangements · CPC title

• G06V10/141

  Control of illumination · CPC title

• G06V40/67

  by interactive indications to the user · CPC title

• G06K9/00912

  Physics · mapped topic