Calibration plate used for binocular camera calibration, calibration method and calibration system thereof

A technology of a binocular camera and a calibration method, which is applied in the field of camera calibration, can solve the problems of complicated operation, high cost and insufficient calibration accuracy, and achieves the effect of improving the calibration accuracy.

Inactive Publication Date: 2017-06-23
CHENGDU TOPPLUSVISION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the deficiencies in the existing camera calibration method technology, such as difficulty in making high-precision calibration refe

Method used

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  • Calibration plate used for binocular camera calibration, calibration method and calibration system thereof
  • Calibration plate used for binocular camera calibration, calibration method and calibration system thereof
  • Calibration plate used for binocular camera calibration, calibration method and calibration system thereof

Examples

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Embodiment 1

[0092] A calibration board for binocular camera calibration, including an electronic device terminal for receiving resolution information and outputting planar checkerboard image drive information according to the resolution, and also includes a terminal for receiving planar checkerboard image drive information and displaying a planar checkerboard grid image display.

[0093] Calibration Target is used in machine vision, image measurement, photogrammetry, 3D reconstruction and other applications to correct lens distortion; determine the conversion relationship between physical size and pixel; and determine the three-dimensional geometric position of a point on the surface of a space object and its position The relationship between corresponding points in the image requires the establishment of a geometric model of camera imaging. 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...

Embodiment 2

[0100] A binocular camera calibration method, comprising the following steps:

[0101] Step 1: Connect the device with the camera to the computer through the USB cable, and wait for the camera to enter the normal working state.

[0102] Step 2: Obtain the resolution of the PC monitor, make a checkerboard image corresponding to the resolution, and display the checkerboard image as a calibration board. Make corresponding checkerboard images according to the monitors with different resolutions, so that the PC can display a clear enough calibration checkerboard and improve the calibration accuracy. Calibrate the checkerboard image as figure 1 shown.

[0103] Step 3: The calibration checkerboard image is preprocessed by the image preprocessing module of the calibration system. Perform preprocessing operations such as denoising and enhancement on the image.

[0104] Step 4: Control to turn on the camera and start shooting checkerboard images for camera calibration.

[0105] Ste...

Embodiment 3

[0168] The calibration system using the above calibration board includes:

[0169] Chessboard image production module: used to obtain the resolution of the display, and make a corresponding plane checkerboard image according to the resolution of the display, and display the checkerboard image as a calibration board in the form of a display;

[0170] Image acquisition module: used to control the camera to shoot and display the display of the plane checkerboard image from multiple perspectives, the picture acquired by the left camera is the left image, and the picture acquired by the right camera is the right image;

[0171] Feature point matching module; used to detect and extract the feature points of the left image and the right image, and then use the sequential matching method to match the feature points of the plane checkerboard image displayed on the display with the left image and the right image to obtain the matched features point;

[0172] Calibration module: used to...

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Abstract

The invention discloses a calibration plate used for binocular camera calibration and a binocular camera calibration method. In an existing camera calibration method technology, a high precision calibration reference object is difficult to make, cost is high, operation is complex and tedious, calibration precision is not high and so on. By using the calibration plate and the method, the above problems are solved. The calibration plate used for binocular camera calibration comprises an electronic equipment terminal machine and a display, wherein the electronic equipment terminal machine is used for receiving resolution information and outputting plane checkerboard image driving information according to a resolution; and the display is used for receiving the plane checkerboard image driving information and displaying a plane checkerboard image.

Description

technical field [0001] The invention relates to the technical field of computer vision, in particular to camera calibration. Background technique [0002] Three-dimensional reconstruction starts from the two-dimensional image information acquired by the camera, calculates the geometric information such as the three-dimensional position and shape of the object, and reconstructs and recognizes the object in the scene. The key to 3D reconstruction is to obtain the corresponding relationship between the point on the 2D image and the 3D geometric position of a point on the surface of the space object. The corresponding relationship is determined by the geometric model of camera imaging. The parameters of these models are called camera parameters, and these parameters include internal parameters of the camera itself and external parameters between cameras. The process of computing these parameters is called camera calibration. [0003] At present, a variety of camera calibration...

Claims

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Application Information

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IPC IPC(8): G06T7/80
Inventor 唐荣富周剑龙学军
Owner CHENGDU TOPPLUSVISION TECH CO LTD
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