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Fisheye camera calibration method and device

A fisheye camera and calibration method technology, applied in image data processing, instrumentation, calculation and other directions, can solve the problems of poor calibration result accuracy and low applicability, etc.

Active Publication Date: 2015-03-04
KUNSHAN BRANCH INST OF MICROELECTRONICS OF CHINESE ACADEMY OF SCI
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Problems solved by technology

However, the use of existing calibration technology is limited by the requirements of camera types and special calibration equipment, and the applicability is low; or limited by the calibration calculation model, the accuracy of the calibration results is poor

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  • Fisheye camera calibration method and device
  • Fisheye camera calibration method and device
  • Fisheye camera calibration method and device

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Embodiment Construction

[0051]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 of the embodiments of the present invention, not all of them. 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.

[0052] As mentioned in the background art, the application of a fisheye camera often requires setting precise parameters of the fisheye camera, that is, calibration is required. The accuracy of fisheye camera calibration results = directly affects the accuracy of its derivatives, therefore, calibration technology has received widespread attention. However, the use of existing calibration technology is limited by the camera type and the requirement...

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Abstract

The invention discloses a fisheye camera calibration method and device. The method includes the steps of establishing an imaging model of a fisheye camera, collecting multiple calibration plate images at different view angles, obtaining coordinates of feature points from the calibration plate images, adjusting the coordinates of the feature points according to the formats of the calibration plate images, determining world coordinates of the feature points according to the preset laws of the feature points in the calibration plate images, calculating the initial values of the distortion center deflection of the calibration plate images with the RMS reprojection error as the evaluation value, minimizing the RMS reprojection error, and optimizing internal parameters and external parameters. In this way, no special calibration devices need to be adopted for the technical scheme, the fisheye camera calibration method and device can be suitable for most fisheye cameras, and the applicability of the calibration method and the accuracy of the calibration result are improved.

Description

technical field [0001] The invention relates to the technical field of fisheye cameras, and more specifically, to a calibration method and a calibration device for a fisheye camera. Background technique [0002] In recent years, because the fisheye camera can provide a 180-degree field of view, it has been widely used in many fields, for example, in robot navigation, 3D modeling, driving safety and other fields. However, while the fisheye camera provides a wide-angle field of view, it is accompanied by fisheye distortion of the image. Therefore, the application of the fisheye camera often requires setting the precise parameters of the fisheye camera, that is, calibration. The accuracy of fisheye camera calibration results directly affects the accuracy of its derivatives, therefore, calibration technology has received widespread attention. However, the use of existing calibration technology is limited by the camera type and the requirements of special calibration equipment, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T7/80
Inventor 徐以强李庆闫硕梁艳菊秦瑞高荣鲁斌常嘉义陆菁
Owner KUNSHAN BRANCH INST OF MICROELECTRONICS OF CHINESE ACADEMY OF SCI
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