Method, device and equipment for acquiring focal length of camera

An acquisition method and focal length technology, applied in the field of electronic information to achieve the effect of online calibration

Pending Publication Date: 2021-06-25
北京爱笔科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, how to calibrate the internal parameters of the camera online has become an urgent problem to be solved.
[0005] This application provides a method and device for obtaining the focal length of a camera, with the purpose of solving the problem of how to realize the online calibration of the focal length of the camera

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  • Method, device and equipment for acquiring focal length of camera
  • Method, device and equipment for acquiring focal length of camera
  • Method, device and equipment for acquiring focal length of camera

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Embodiment Construction

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0060] During the course of the research, the applicant found that: in this way of offline calibration, because it is impossible to predict which type of camera is used to collect the image data of AR, it is necessary to obtain as many internal references of the camera as possible. Therefore, it leads to The workload is heavy, and even if the workload is large, it is difficult to cover all camera types, which may make AR impossible to realize.

[0061] Therefore, the fundamental poi...

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Abstract

The invention provides a camera focal length acquisition method and device, and equipment, and the method comprises the steps: obtaining an image collected by a camera, obtaining a parameter under a candidate focal length according to a preset candidate focal length and the resolution of the image, and carrying out the positive correlation of the possibility of taking the candidate focal length as the focal length with the number of interior points according to the parameter, carrying out the inverse correlation with a re-projection error, and selecting a focal length of the camera from the candidate focal lengths. According to the method, the focal length of the camera is obtained on the basis of the image collected by the camera, so that the focal length can be calibrated based on the image and the preset candidate focal length after the image is collected by the camera in the process of realizing AR, and the online calibration of the focal length of the camera is realized.

Description

technical field [0001] The present application relates to the field of electronic information, in particular to a method, device, and equipment for acquiring the focal length of a camera. Background technique [0002] When running augmented reality (Augmented Reality, AR)-related applications, the internal parameters of the camera (including focal length, etc.) are indispensable parameters for realizing AR. However, in the prior art, the internal parameters of the camera are usually calibrated in advance and recorded in the file of the AR-related application, so as to be called when running the AR-related application. [0003] This method of pre-acquiring the internal parameters of the camera is called offline calibration. The existing offline calibration method has a large workload, and although the workload is heavy, it is difficult to cover all camera types, which may lead to the failure of AR. Contents of the invention [0004] During the research process, the applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/80
CPCG06T7/80
Inventor 杨旭李虎民
Owner 北京爱笔科技有限公司
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