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A kind of fast calibration method and device of camera optical center

An optical center and camera technology, applied in the field of optics, can solve problems such as time-consuming and complicated optical center calibration process, and achieve the effect of reducing the complexity of calculation and the degree of complexity

Active Publication Date: 2021-09-07
北京峰云视觉技术有限公司
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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a method and device for quickly calibrating the optical center of a camera, which solves the problem that the calibration process of the optical center in the prior art is very complicated and time-consuming

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  • A kind of fast calibration method and device of camera optical center
  • A kind of fast calibration method and device of camera optical center
  • A kind of fast calibration method and device of camera optical center

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Embodiment Construction

[0064]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 making creative efforts belong to the protection scope of the present invention.

[0065] refer to figure 1 , which shows a schematic flowchart of a method for quickly calibrating the optical center of a camera provided by an embodiment of the present invention. In this embodiment, the method includes:

[0066] S101: Acquire a distorted image;

[0067] In this embodiment, the user can take pictures of the preset test card through the camera to be calibrated, and try to fill the entire field of view with the test card to obtain a distorted im...

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Abstract

The present invention provides a method and device for quickly calibrating the optical center of a camera, comprising: acquiring a distorted image; determining a plurality of suspected optical center coordinates within a preset range of the distorted image center; The constructed distortion model corrects the distorted image to obtain the corrected image; respectively obtains straight line groups in each corrected image; calculates the straightness of each said straight line group; The center coordinates are used to calculate the optical center of the camera to be calibrated. In this way, the optical center of the camera can be calibrated only by acquiring a distorted image, and the calculation complexity is reduced by calculating the straightness.

Description

technical field [0001] The invention relates to the field of optics, in particular to a method and device for quickly calibrating the optical center of a camera. Background technique [0002] For an ideal imaging system, the optical axis of the lens is perpendicular to the image plane of the image sensor, and the center of the lens coincides with the center of the image plane. Due to machining and structural errors, the optical axis and the image plane may not be completely perpendicular or the center of the lens and the image plane may not be completely perpendicular. The centers do not coincide, which requires calibration to find out the actual optical center of the camera. [0003] In the prior art, there are many methods for calibrating the optical center of the camera, but the calibration methods in the prior art generally need to acquire multiple distorted images, and the calibration process is very complicated and time-consuming. Contents of the invention [0004] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/80
CPCG06T7/80
Inventor 王美荣
Owner 北京峰云视觉技术有限公司
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