Unlock instant, AI-driven research and patent intelligence for your innovation.

Camera calibration method, system and equipment based on license plate information

A technology of camera calibration and calibration method, which is applied in the field of camera calibration based on license plate information, can solve problems such as inability to calibrate one by one, unable to correct parameters in time, and achieve an effective calibration effect

Pending Publication Date: 2022-05-13
CHENGDU VISION ZENITH TECH DEV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common practice—using a standard format calibration board to take pictures at various distances and angles, and then using corner detection and Zhang Zhengyou’s calibration method to calculate internal parameters and distortion parameters—when the cameras leave the factory in large quantities, they cannot be calibrated one by one. And when the camera changes in the field, the parameters cannot be corrected in time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Camera calibration method, system and equipment based on license plate information
  • Camera calibration method, system and equipment based on license plate information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] The present invention will be further described in conjunction with the drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by persons of ordinary skill in the art shall fall within the protection scope of the embodiments of the present invention.

[0041] see figure 1 , the present invention provides an embodiment of a camera calibration method based on license plate information, specifically, the method includes:

[0042] S101: Acquire multiple frames of images including the license plate;

[0043] S102: Obtain the license plate detection frame in the multi-frame image through a deep learning algorithm;

[0044] S103: Obtain the positions of the four vertices of the license plate in the license plate detection frame and the category information of the license plate through a deep learning algorithm;

[0045] S104: Calibrate the camera according to t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a camera calibration method, system and equipment based on license plate information. The method comprises the following steps: acquiring multiple frames of images containing license plates; obtaining a license plate detection frame in the multiple frames of images through a deep learning algorithm; obtaining positions of four vertexes of the license plate in the license plate detection frame and category information of the license plate through a deep learning algorithm; and calibrating the camera according to the category information and the vertex position of the license plate. When multiple frames of license plate information appear in a camera scene, camera parameters can be effectively calibrated.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a camera calibration method, system and equipment based on license plate information. Background technique [0002] Camera calibration is a common and basic operation in the field of image processing. It refers to the technology of calibrating the internal reference, external reference and distortion parameters of the camera by using materials such as calibration boards. The calibrated camera can convert between the three-dimensional geometric position of a point on the surface of a space object and its corresponding point in the image. [0003] Image calibration is a very critical link in image measurement and machine vision applications, and is an important basis for subsequent application work. However, the common practice—using a standard format calibration board to take pictures at various distances and angles, and then using corner detection and Zhang Zhengyou’s ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06T7/80
CPCG06T7/80G06T2207/30252G06T2207/20081
Inventor 陶福煜任鹏周卓立
Owner CHENGDU VISION ZENITH TECH DEV