Camera authentication method and control apparatus

Patent metadata

Field	Value
Publication number	US-12200323-B2
Application number	US-202218045976-A
Country	US
Kind code	B2
Filing date	Oct 12, 2022
Priority date	Apr 14, 2020
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A camera authentication method and a control apparatus are provided, and are applicable to an identity authentication of an on-board camera in the autonomous driving field. The method includes: obtaining one or more frames of a first image shot by a to-be-authenticated camera; determining one or more light intensity offset values of N photosensitive units based on the one or more frames of the first image; determining a matching degree between the light intensity offset values of the N photosensitive units and a preset N-dimensional vector; and if the matching degree meets a preset condition, determining that authentication of the to-be-authenticated camera succeeds, where the N photosensitive units are in a photosensitive layer of the to-be-authenticated camera, and the photosensitive layer includes M photosensitive units, where N≤M. This technical solution is used to improve camera security.

First claim

What is claimed is:

1. A camera authentication method, comprising:
obtaining one or more frames of a first image shot by a to-be-authenticated camera;
determining one or more light intensity offset values of N photosensitive units based on the one or more frames of the first image, wherein the N photosensitive units are in a photosensitive layer of the to-be-authenticated camera, and the photosensitive layer comprises M photosensitive units, wherein N≤M; and
determining a matching degree between the light intensity offset values of the N photosensitive units and a preset N-dimensional vector, and if the matching degree meets a preset condition, determining that authentication of the to-be-authenticated camera succeeds.

2. The method according to claim 1 , wherein the determining one or more light intensity offset values of N photosensitive units based on the one or more frames of the first image comprises:
determining one or more light intensity offset values of the M photosensitive units based on the one or more frames of the first image, and using one or more largest light intensity offset values of N photosensitive units in the light intensity offset values of the M photosensitive units as the light intensity offset values of the N photosensitive units; or
determining the light intensity offset values of the N photosensitive units based on the one or more frames of the first image and photosensitive units at N preset positions, wherein the N photosensitive units are the photosensitive units at the N preset positions in the photosensitive layer of the to-be-authenticated camera.

3. The method according to claim 1 , wherein the determining one or more light intensity offset values of N photosensitive units based on the one or more frames of the first image comprises:
for each frame of the one or more frames of the first image, determining a light intensity offset value of a k th photosensitive unit in the N photosensitive units in the first image, wherein 1≤k≤N; and
determining an average value of light intensity offset values of the k th photosensitive unit in all the frames of the first image as a light intensity offset value of the k th photosensitive unit.

4. The method according to claim 1 , wherein the determining one or more light intensity offset values of N photosensitive units based on the one or more frames of the first image comprises:
for any frame of the first image, determining a difference between a light intensity value of the k th photosensitive unit in the first image and a light intensity value of one adjacent photosensitive unit in the first image as the light intensity offset value of the k th photosensitive unit in the first image, wherein
the adjacent photosensitive unit and the k th photosensitive unit correspond to a same color and have a preset distance corresponding to the color.

5. The method according to claim 1 , wherein the determining one or more light intensity offset values of N photosensitive units based on the one or more frames of the first image comprises:
for any frame of the first image, determining an average light intensity value of light intensity values of a plurality of adjacent photosensitive units in the first image; and
determining a difference between the light intensity value of the k th photosensitive unit in the first image and the average light intensity value as the light intensity offset value of the k th photosensitive unit in the first image, wherein
each of the plurality of adjacent photosensitive units and the k th photosensitive unit correspond to a same color and have a preset distance corresponding to the color.

6. The method according to claim 1 , wherein the preset N-dimensional vector is one or more light intensity offset values that are of N photosensitive units and that are determined based on one or more frames of a second image shot by the to-be-authenticated camera.

7. The method according to claim 1 , wherein the determining a matching degree between the light intensity offset values of the N photosensitive units and a preset N-dimensional vector, and if the matching degree meets a preset condition, determining that authentication of the to-be-authenticated camera succeeds comprises:
determining a similarity between a first vector and the preset N-dimensional vector, wherein the first vector is formed by the light intensity offset values of the N photosensitive units in a preset sequence; and
if the similarity is greater than a similarity threshold, determining that authentication of the to-be-authenticated camera succeeds.

8. The method according to claim 7 , wherein the preset sequence is determined based on one or more positions of the N photosensitive units in the photosensitive layer of the to-be-authenticated camera; or
the preset sequence is determined based on a magnitude of the light intensity offset values of the N photosensitive units.

9. A camera authentication apparatus, comprising a memory and a processor, wherein the memory is configured to store an instruction, the processor is configured to execute the instruction to:
obtain one or more frames of a first image shot by a to-be-authenticated camera;
determine one or more light intensity offset values of N photosensitive units based on the one or more frames of the first image, wherein the N photosensitive units are in a photosensitive layer of the to-be-authenticated camera, and the photosensitive layer comprises M photosensitive units, wherein N≤M; and
determine a matching degree between the light intensity offset values of the N photosensitive units and a preset N-dimensional vector, and if the matching degree meets a preset condition, determine that authentication of the to-be-authenticated camera succeeds.

10. The camera authentication apparatus according to claim 9 , wherein the processor is configured to execute the instruction to:
determine one or more light intensity offset values of the M photosensitive units based on the one or more frames of the first image, and use one or more largest light intensity offset values of N photosensitive units in the light intensity offset values of the M photosensitive units as the light intensity offset values of the N photosensitive units; or
determine the light intensity offset values of the N photosensitive units based on the one or more frames of the first image and photosensitive units at N preset positions, wherein the N photosensitive units are the photosensitive units at the N preset positions in the photosensitive layer of the to-be-authenticated camera.

11. The camera authentication apparatus according to claim 9 , wherein the processor is configured to execute the instruction to:
for each frame of of the one or more frames of the first image, determine a light intensity offset value of a k th photosensitive unit in the N photosensitive units in the first image, wherein 1≤k≤N; and
determine an average value of light intensity offset values of the k th photosensitive unit in all the frames of the first image as a light intensity offset value of the k th photosensitive unit.

12. The apparatus camera authentication according to claim 9 , wherein the processor is configured to execute the instruction to:
for any frame of the first image, determine a difference between a light intensity value of the k th photosensitive unit in the first image and a light intensity value of one adjacent photosensitive unit in the first image as the light intensity offset value of the k th photosensitive unit in the first image, wherein
the adjacent photosensitive unit and the k th photosensitive unit correspond to a same color and have a preset distance corresponding to t

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhong Steven Yin
• Yang Yanjiang
• Wei Zhuo

Classifications

• H04N17/002

  for television cameras · CPC title

• G06T7/0002

  Inspection of images, e.g. flaw detection · CPC title

• H04N23/54

  Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils · CPC title

• G08G1/096725

  where the received information generates an automatic action on the vehicle control · CPC title

• H04L63/0876

  based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint · CPC title