Document verification system, device, and method using a classification model

Patent metadata

Field	Value
Publication number	US-10783369-B2
Application number	US-202016736962-A
Country	US
Kind code	B2
Filing date	Jan 8, 2020
Priority date	Oct 20, 2017
Publication date	Sep 22, 2020
Grant date	Sep 22, 2020

Abstract

Disclosed in the application are document verification and identity verification methods and devices. A computer-implemented document verification method comprises: obtaining an image of a to-be-verified document; and verifying whether an anti-counterfeiting identifier exists in the image; verifying a source of the image; and obtaining a verification result for the to-be-verified document based on the verification of the anti-counterfeiting identifier and the verification of the source of the image. A computer-implemented identity verification method comprises: obtaining an image of an identity document of a to-be-verified user; obtaining a first verification result for the identity document based on the image of the identity document; verifying authenticity of identity information in the image of the identify document to obtain a second verification result; and determining an identity verification result for the to-be-verified user based on the first verification result and the second verification result.

First claim

What is claimed is:

1. A computer-implemented document verification method, comprising:
obtaining an image of a to-be-verified document;
providing the image as input to a trained classification model;
obtaining an output of the trained classification model, wherein the output represents a probability at which the image passes an anti-counterfeiting identifier verification;
verifying whether an anti-counterfeiting identifier exists in the image based on the output of the trained classification model;
performing first verification on the image to determine a probability at which the image is from a screen print;
performing second verification on the image to determine a probability at which the image is from a copy;
determining a probability at which the image is from a physical document based on the probability at which the image is from a screen print and the probability at which the image is from a copy;
verifying a source of the image based on the probability at which the image is from a physical document; and
obtaining a verification result for the to-be-verified document based on the verifying of the anti-counterfeiting identifier and the verifying of the source of the image.

2. The method according to claim 1 , wherein verifying whether an anti-counterfeiting identifier exists in the image comprises:
determining a type of anti-counterfeiting identifier corresponding to a type of the to-be-verified document; and
determining a probability at which an anti-counterfeiting identifier corresponding to the determined type of anti-counterfeiting identifier exists in the image.

3. The method according to claim 2 , wherein the type of anti-counterfeiting identifier comprises at least one of watermark text, micro-text, shading lines, gravure printing, color cast, anti-counterfeiting secret marks, or fonts.

4. The method according to claim 1 , wherein verifying a source of the image comprises:
analyzing data of the image to determine a probability at which the image is from a physical document.

5. The method according to claim 4 , wherein analyzing data of the image to determine a probability at which the image is from a physical document comprises:
performing image recognition processing on data of an individual frame in the image.

6. The method according to claim 4 , wherein analyzing data of the image to determine a probability at which the image is from a physical document comprises:
obtaining at least two types of images of the to-be-verified document;
performing differencing processing on data of the at least two types of images to obtain image difference; and
using the image difference as an input to a pre-established classification model, the pre-established classification model being trained to output a verification result of the source of the image based on the input image difference.

7. The method according to claim 4 , wherein verifying an anti-counterfeiting identifier in the image comprises:
determining a type of anti-counterfeiting identifier corresponding to a type of the to-be-verified document;
determining a probability at which an anti-counterfeiting identifier corresponding to the determined type of anti-counterfeiting identifier exists in the image; and
wherein obtaining a verification result for the to-be-verified document based on the verifying of the anti-counterfeiting identifier and the verifying of the source of the image comprises:
determining the verification result based on the probability at which an anti-counterfeiting identifier corresponding to the determined type of anti-counterfeiting identifier exists in the image and the probability at which the image is from a physical document.

8. The method according to claim 1 , wherein verifying a source of the image comprises:
collecting a background image before or after obtaining the image of the to-be-verified document;
verifying the image of the to-be-verified document based on the background image to determine whether the image of the to-be-verified document and the background image are from a same photographing scene.

9. The method according to claim 8 , wherein verifying the image of the to-be-verified document based on the background image to determine whether the image of the to-be-verified document and the background image are from a same photographing scene comprises:
comparing a background region in the image of the to-be-verified document with the background image to determine an overlapping degree between the image of the to-be-verified document and the background image, the background region in the image of the to-be-verified document being a region outside a region of the to-be-verified document in the image; and
determining whether the image of the to-be-verified document and the background image are from the same photographing scene based on the overlapping degree.

10. The method according to claim 9 , wherein comparing a background region in the image of the to-be-verified document with the background image to determine an overlapping degree between the image of the to-be-verified document and the background image comprises:
comparing the background region in the image of the to-be-verified document with the background image based on first position information of a gyroscope of a device when the device collects the image of the to-be-verified document and second position information of the gyroscope of the device when the device collects the background image.

11. A document verification device, comprising:
a hardware processor; and
a non-transitory machine-readable storage medium encoded with instructions executable by the hardware processor to perform operations comprising:
obtaining an image of a to-be-verified document;
providing the image as input to a trained classification model;
obtaining an output of the trained classification model, wherein the output represents a probability at which the image passes an anti-counterfeiting identifier verification;
verifying whether an anti-counterfeiting identifier exists in the image based on the output of the trained classification model;
performing first verification on the image to determine a probability at which the image is from a screen print;
performing second verification on the image to determine a probability at which the image is from a copy;
determining a probability at which the image is from a physical document based on the probability at which the image is from a screen print and the probability at which the image is from a copy;
verifying a source of the image based on the probability at which the image is from a physical document; and
obtaining a verification result for the to-be-verified document based on the verifying of the anti-counterfeiting identifier and the verifying of the source of the image.

12. The document verification device according to claim 11 , wherein the verifying whether an anti-counterfeiting identifier exists in the image comprises:
determining a type of anti-counterfeiting identifier corresponding to a type of the to-be-verified document; and
determining a probability at which an anti-counterfeiting identifier corresponding to the determined type of anti-counterfeiting identifier exists in the image.

13. The document verification device according to claim 12 , wherein the type of anti-counterfeiting identifier comprises at least one of watermark text, micro-text, shading lines, gravure printing, color cast, anti-counterfeiting secret marks, or fonts.

14. The document verification device according to claim 11 , wherein the verifying a source of the image comprises:
analyzing data of the image to determine a

Assignees

• Alibaba Group Holding Ltd

Inventors

• Zheng Dandan
• Xu Wei
• Li Liang

Classifications

• G07D7/0034 Primary

  using watermarks · CPC title

• G06V30/40

  Document-oriented image-based pattern recognition · CPC title

• G06V10/225

  based on a marking or identifier characterising the area · CPC title

• G06V20/80

  Recognising image objects characterised by unique random patterns · CPC title

• G06F18/24

  Classification techniques · CPC title