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Method for detecting calibration board

A detection method and calibration board technology, which is applied in image data processing, instruments, calculations, etc., can solve the problems that the calibration board detection method needs to be improved, and achieve the effects of saving calibration time, improving calibration accuracy, and improving calibration efficiency

Active Publication Date: 2018-12-11
上海商泰汽车信息系统有限公司
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Problems solved by technology

[0006] However, the calibration plate detection method in the prior art still needs to be improved

Method used

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  • Method for detecting calibration board
  • Method for detecting calibration board
  • Method for detecting calibration board

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Embodiment Construction

[0035] It can be seen from the background technology that the existing calibration plate detection method still needs to be improved.

[0036] Now analyze in conjunction with a calibration plate detection method, the calibration plate detection method includes: obtaining the first type of calibration plate image captured by the corresponding vehicle-mounted panoramic camera; identifying the preset first type of calibration plate image from the corresponding first type of calibration plate image The position coordinates of the number of sign dots in the image coordinate system of the corresponding vehicle-mounted panoramic camera; determine the initial external parameters of the corresponding vehicle-mounted panoramic camera.

[0037] The accuracy of the initial external parameters obtained by the above-mentioned calibration board detection method is low, which leads to poor mosaic effect of the surrounding images of the vehicle. The reasons for the analysis are as follows:

[...

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Abstract

A method for detecting a calibration board includes providing a vehicle-mounted panoramic camera and a first type of calibration board, wherein an upper surface of that first type of calibration boardis provided with a mark point; acquiring an initial image captured by a vehicle-mounted panoramic camera; identifying a mark dot in the initial image and overlaying the first mark block at the position where the mark dot is identified as the mark dot; judging whether the first marker block covers the marker dot, if the first marker block covers the marker dot, then, obtaining the center coordinates of the mark points to determine the initial external parameters of the vehicle-mounted panoramic camera; if the first mark block does not cover the mark points, adjusting the surrounding environment of the first type calibration board, obtaining the images captured by the vehicle-mounted panoramic camera again, and carrying out the next cycle until the first mark block covers the mark points. The method is convenient for the operator to judge whether the identification of the position of the mark dot is accurate or not and to conveniently find the disturbing object caused by wrong identification in the environment, which is helpful to improve the calibration efficiency, save the calibration time and improve the calibration precision.

Description

technical field [0001] The invention relates to the technical field of automotive electronics, in particular to a calibration board detection method. Background technique [0002] Calibration Target can be used to correct lens distortion in applications such as machine vision, image measurement, photogrammetry, and 3D reconstruction. [0003] The geometric model of the camera can be obtained through the calculation of the camera with a fixed-pitch pattern array plate and the calculation of the calibration algorithm, so as to obtain high-precision measurement and reconstruction results. [0004] The vehicle-mounted panoramic camera is used to collect images around the vehicle. The vehicle-mounted panoramic camera includes a front camera on the front side of the vehicle, a rear camera on the rear side of the vehicle, a left camera on the left side of the vehicle, and a right camera on the right side of the vehicle. After obtaining the images around the vehicle, the image stit...

Claims

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Application Information

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IPC IPC(8): G06T7/136G06T7/187G06T7/80G06T3/40
CPCG06T3/4038G06T7/136G06T7/187G06T7/80
Inventor 余旭根孙亚锋葛金炬谈旭峰
Owner 上海商泰汽车信息系统有限公司
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