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Multipath fisheye camera calibration device and method

A technology of fisheye camera and calibration device, which is applied in image data processing, instrumentation, computing, etc., and can solve the problem of high requirements for calibration scenarios

Pending Publication Date: 2017-05-10
CHANGSHA PANODUX TECH CO LTD
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Problems solved by technology

[0006] The present invention aims to provide a multi-channel fisheye camera calibration device and method with lower requirements on the calibration scene to overcome the technical problem that the existing camera calibration based on the calibration object has higher requirements on the calibration scene

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  • Multipath fisheye camera calibration device and method
  • Multipath fisheye camera calibration device and method
  • Multipath fisheye camera calibration device and method

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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0048] In the existing methods of calibrating panoramic cameras based on calibration objects, a single plane calibration board is used, which has relatively high requirements on the calibration area, which is generally a circle with the minimum calibration distance as the radius. However, often the laboratory scene is limited, which makes the calibration inconvenient. It is necessary to manually adjust the calibration board and the panoramic camera manually, which i...

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Abstract

The invention discloses a multipath fisheye camera calibration device and method, and belongs to the technical field of camera calibration. The method comprises the following steps of: acquiring calibration plate images at different positions in a calibration target by adoption of each path of fisheye camera of a panorama camera module; selecting an isometric projection distortion model; respectively calculating intrinsic parameters of lenses and extrinsic parameters of each field of view according to acquired fisheye lens images and an imaging model; carrying out nonlinear optimization on the obtained intrinsic and extrinsic parameters so as to obtain optimum lens intrinsic and extrinsic parameters M, K, R and T. According to the method, calibration image acquisition is carried out on the calibration plate in a new folding calibration target, so that the requirement for the sizes of calibration areas is reduced, enough characteristic points can be found and the complexity of al algorithm is lightened; and moreover, the calibration plate image acquisition is more flexible, and images of each area in a visual range of the lenses can be acquired, so that the camera calibration precision is greatly improved.

Description

technical field [0001] The invention relates to the technical field of camera calibration, in particular to a multi-channel fisheye camera calibration device and method. Background technique [0002] In the image measurement process and machine vision applications, in order to determine the relationship between the three-dimensional geometric position of a point on the surface of a space object and its corresponding point in the image, it is necessary to establish a geometric model of camera imaging. The process of solving these geometric model parameters is camera calibration. . Whether it is in image measurement or machine vision applications, camera calibration is a very critical part. Calibration accuracy and algorithm stability directly affect the results of subsequent camera work. [0003] Camera calibration methods mainly include traditional camera calibration methods and camera self-calibration methods. The traditional camera calibration method needs to use a calib...

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Application Information

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IPC IPC(8): G06T7/00
CPCG06T2207/20068G06T2207/10004
Inventor 不公告发明人
Owner CHANGSHA PANODUX TECH CO LTD
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