Image processing method and corresponding device

By using multiple fill light intensity to capture multiple images during the image acquisition cycle of the traffic camera and determining the target image through the control device, the overexposed or underexposed image caused by complex road lighting conditions at night is solved, and image quality and recognition accuracy are improved.

CN120034751APending Publication Date: 2025-05-23HUAWEI TECH CO LTD
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Patent Information

Application Number
CN202311579785.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-11-22
Publication Date
2025-05-23

AI Technical Summary

Technical Problem

In environments with complex lighting conditions at night, traffic cameras are prone to overexposed or underexposed problems, resulting in low quality of images taken and inability to effectively identify important information such as license plates and faces.

Method used

By filling the light with at least two fill light intensities in the image acquisition period, and taking multiple images at different fill light intensities, the control device acquires these images and determines the target image. The target image is an image that meets the image output requirements or an image obtained by image fusion.

Benefits of technology

Improve the quality of the image, overcome the problems of overexposed or underexposed, ensure that the high-quality images output by the camera can correctly identify license plates and face information, and improve the use value of the image.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides an image processing method, which is applied to an image processing device, the image processing device comprises a light supplementing device, a shooting device and a control device, the light supplementing device is used for supplementing light for the shooting device by adopting at least two light supplementing intensities in an image acquisition period, and the shooting device is used for controlling the shooting device in the image acquisition period. At least two images under the at least two light supplementing intensities are shot, and the at least two light supplementing intensities are in one-to-one correspondence with the at least two images; the method comprises the following steps: a control device acquires at least two images; and the control device determines a target image, the target image is one image meeting the image output requirement in the at least two images, or the target image is an image obtained by fusing the at least two images. According to the scheme provided by the invention, the image with relatively high quality can be obtained, the license plate and face lamp information in the image can be correctly recognized in subsequent application, and the use value of the image is improved.
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Claims

1. A method for image processing, It is characterized in that The method is applied to an image processing device, the image processing device comprising a fill light device, a shooting device and a control device, the fill light device is used to fill light the shooting device with at least two fill light intensities in one image acquisition cycle, the shooting device is used to shoot at least two images under the at least two fill light intensities in the image acquisition cycle, wherein the at least two fill light intensities correspond to the at least two images one by one; the method comprises: The control device acquires the at least two images; The control device determines a target image, where the target image is one of the at least two images that meets image output requirements, or the target image is an image obtained by merging the at least two images.

2. The method according to claim 1, It is characterized in that The at least two fill light intensities are controlled by at least two fill light parameters of different sizes, and the at least two fill light parameters of different sizes correspond one-to-one to the at least two fill light intensities.

3. The method according to claim 2, It is characterized in that The fill light parameter includes the width of the fill light pulse or the fill light current intensity.

4. The method according to claim 2 or 3, It is characterized in that The number of the fill light parameters is positively correlated with the ambient light complexity of the environment in which the image processing device is located. The ambient light complexity is used to indicate at least one of the type, quantity or intensity of light in the environment in which the image processing device is located.

5. The method according to any one of claims 1 to 4, It is characterized in that The control device acquires the at least two images, including: The control device acquires the at least two images according to the order in which the at least two images are taken; The control device determines the target image, including: The control device determines that the first image is a target image, the first image meets image output requirements, and the first image is captured earlier than the second image.

6. The method according to any one of claims 1 to 4, It is characterized in that The control device acquires the at least two images, including: The control device acquires the at least two images according to the order in which the at least two images are taken; The control device determines the target image, including: If the first image does not meet the image output requirement, the control device determines that a second image is the target image, the second image meets the image output requirement, and the shooting time of the second image is later than that of the first image.

7. The method according to any one of claims 1 to 4, It is characterized in that The control device determines the target image, including: When the at least two images do not meet the image output requirement, image fusion is performed on the at least two images to obtain the target image.

8. The method according to claim 7, It is characterized in that The performing image fusion on the at least two images to obtain the target image includes: Determine at least two gradient values ​​corresponding to a first pixel in the photographing device, where the at least two gradient values ​​are gradient values ​​of a pixel corresponding to the first pixel in each of the at least two images, and the first pixel is any pixel in the photographing device; Determining fusion information of the first pixel point according to the at least two gradient values; The target image is determined according to the fusion information of each pixel in the shooting device.

9. The method according to any one of claims 1 to 8, It is characterized in that The order in which the at least two fill light intensities are used is related to the brightness or complexity of the ambient light in the environment where the image processing device is located.

10. The method according to any one of claims 1 to 8, It is characterized in that The fill light device is a light emitting diode strobe light.

11. A control device, It is characterized in that The invention is applied to an image processing device, wherein the image processing device further comprises a fill light device and a shooting device, wherein the fill light device is used to fill light the shooting device with at least two fill light intensities in one image acquisition cycle, and the shooting device is used to shoot at least two images under the at least two fill light intensities in the image acquisition cycle, wherein the at least two fill light intensities correspond to the at least two images in a one-to-one manner; and the control device comprises: An acquisition unit, configured to acquire the at least two images; The processing unit is used to determine a target image, where the target image is an image among the at least two images that meets the image output requirement, or the target image is an image obtained by fusing the at least two images.

12. The device according to claim 11, It is characterized in that The acquisition unit is specifically configured to acquire the at least two images according to the order in which the at least two images are taken; The processing unit is specifically configured to determine that the first image is a target image, the first image meets the image output requirement, and the first image is shot earlier than the second image.

13. The device according to claim 11, It is characterized in that The acquisition unit is specifically configured to acquire the at least two images according to the order in which the at least two images are taken; The processing unit is specifically configured to determine that a second image is the target image if the first image does not meet the image output requirement, the second image meets the image output requirement, and the shooting time of the second image is later than that of the first image.

14. The device according to claim 11, It is characterized in that The processing unit is specifically configured to perform image fusion on the at least two images to obtain the target image when the at least two images do not meet the image output requirement.

15. The device according to claim 14, It is characterized in that The processing unit is specifically used for: Determine at least two gradient values ​​corresponding to a first pixel in the photographing device, where the at least two gradient values ​​are gradient values ​​of a pixel corresponding to the first pixel in each of the at least two images, and the first pixel is any pixel in the photographing device; Determining fusion information of the first pixel point according to the at least two gradient values; The target image is determined according to the fusion information of each pixel in the shooting device.

16. An image acquisition device, It is characterized in that include: A fill light device and a shooting device, wherein the fill light device is used to fill light the shooting device with at least two fill light intensities in one image acquisition cycle, and the shooting device is used to shoot at least two images under the at least two fill light intensities in the image acquisition cycle, wherein the at least two fill light intensities correspond one-to-one to the at least two images.

17. An electronic device, It is characterized in that include: A communication interface, a processor and a memory, wherein the communication interface and the processor are coupled to the memory, and the memory is used to store programs or instructions. When the programs or instructions are executed by the processor, the electronic device executes the method as described in any one of claims 1 to 10.

18. A chip system, It is characterized in that The chip system includes one or more interface circuits and one or more processors; the interface circuits and the processors are interconnected via lines; the interface circuits are used to receive signals from a memory of an electronic device and send signals to the processor, the signals including computer instructions stored in the memory; when the processor executes the computer instructions, the electronic device executes the method as described in any one of claims 1 to 10.

19. An image processing device, It is characterized in that include: A fill light device, a shooting device and a control device, wherein the fill light device is used to fill light the shooting device with at least two fill light intensities in one image acquisition cycle, and the shooting device is used to shoot at least two images under the at least two fill light intensities in the image acquisition cycle, wherein the at least two fill light intensities correspond one-to-one to the at least two images; and the control device is used to execute the method as described in any one of claims 1 to 10.

20. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores instructions, and when the instructions are executed on an electronic device, the electronic device executes the method according to any one of claims 1 to 10.

21. A computer program product, It is characterized in that The computer program product comprises a computer program code, which, when executed on a computer, causes the computer to perform the method according to any one of claims 1 to 10.