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Camera parameter calibration method based on GPS

A camera parameter and calibration method technology, which is applied in the field of GPS-based camera parameter calibration, can solve problems such as errors and inability to fully meet accuracy requirements, and achieve the effect of improving accuracy and precision and avoiding low precision

Inactive Publication Date: 2017-12-12
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, the general calibration template cannot fully meet the accuracy requirements, thus causing errors

Method used

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  • Camera parameter calibration method based on GPS
  • Camera parameter calibration method based on GPS
  • Camera parameter calibration method based on GPS

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Embodiment Construction

[0025] It is easy to understand that, according to the technical solution of the present invention, those skilled in the art can imagine various implementations of the GPS-based camera parameter calibration method of the present invention without changing the essence of the present invention. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the entirety of the present invention or as a limitation or limitation on the technical solution of the present invention.

[0026] One, basic thought of the present invention

[0027] First, obtain the longitude, latitude and height coordinate information of the centroid of the GPS receiving antenna in the WGS-84 coordinate system through the GPS receiving antenna, and at the same time use the camera to collect images of the GPS receiving antenna at different positions;

[0028] Then, coordinate conversion is performe...

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Abstract

The invention proposes a camera parameter calibration method based on a GPS, and the method comprises the steps: obtaining the longitude, latitude and height coordinates of the mass center of a GPS receiving antenna in a GPS navigation coordinate system through a GPS receiving antenna, and collecting images of the GPS receiving antenna at different positions through a camera; carrying out the coordinate conversion according to the GPS navigation coordinate system and the world coordinate system, obtaining the coordinates of the mass center of the GPS receiving antenna, and obtaining the coordinates of the mass center of the GPS receiving antenna in the images through employing a Harris corner detection algorithm; and solving a camera parameter matrix according to a camera imaging model. According to the invention, the method employs the precise coordinates of the GPS to replace a calibration template in a calibration process, avoids a calibration error caused by low precision of the calibration template, and improves the calibration precision.

Description

technical field [0001] The invention belongs to the technical field of computer vision processing, and in particular relates to a camera parameter calibration method based on GPS. Background technique [0002] Calculating the geometric information of objects in three-dimensional space from the two-dimensional image information acquired by the camera is one of the main tasks of computer vision technology. In the process of object 3D reconstruction and feature recognition, the relationship between the 3D geometric position of a certain point on the surface of the space object and the corresponding pixel position in the 2D image is determined by the geometric model of the camera imaging. Parameters are camera parameters, such as focal length, principal point, rotation and translation vectors, etc., and the process of obtaining these parameters is the camera parameter calibration process. As an indispensable part of computer vision, the stability and high precision of the camer...

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Application Information

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IPC IPC(8): G06T7/80G01S19/42
CPCG01S19/42
Inventor 陈钱孔筱芳顾国华钱惟贤任侃王佳节
Owner NANJING UNIV OF SCI & TECH
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