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Automobile panorama camera calibration method and apparatus

A technology of a panoramic camera and a calibration method, which is applied in the field of calibration methods and devices, can solve problems such as failure to meet display requirements, achieve the effects of improving display quality, promoting promotion, and improving calibration accuracy

Active Publication Date: 2014-07-30
SHENZHEN DACHENG TECH DEV CO LTD
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Problems solved by technology

Therefore, the calibration results of the traditional calibration method for the distant ground cannot meet the ideal display requirements.

Method used

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  • Automobile panorama camera calibration method and apparatus
  • Automobile panorama camera calibration method and apparatus
  • Automobile panorama camera calibration method and apparatus

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Embodiment Construction

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0047] see figure 1 , discloses a car panoramic camera system aimed at according to the present invention, including four cameras 1 arranged at the front, rear, left, and right sides of the car, an image processing unit 2 located in the car, and a display 3, and the image processing unit obtains the four cameras 1 The captured image, because the image includes predetermined regular image information in the calibration template, so that the image processing unit can identify and use the image features in the calibr...

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Abstract

The invention discloses an automobile panorama camera calibration method and apparatus. The method comprises: first of all, laying a calibration template at the periphery of an automobile, the calibration template being composed of a plurality of black-and-white calibration grids laid at the periphery of the automobile, and arranging positioning grids at the four corner positions of the automobile; then obtaining data of four cameras at the periphery of the automobile, extracting gray values and performing boundary enhancement operation; then sequentially finding out the corner coordinates of all the calibration grids through steps of firstly searching for reference calibration grids, then searching for reference calibration rows and reference calibration columns, and finally searching to finish other calibration grids; and finally, by use of the correlation of the found calibration grid data and areas below the reference calibration rows, predicting the calibration data in a row at the bottom of the calibration grids. The advantages are as follows: the requirement for camera installation precision is greatly reduced, there are no requirements for the consistency of the internal parameters of the cameras, the calibration accuracy is improved, and the visual scope is enlarged.

Description

technical field [0001] The present invention relates to a calibration method and device. In particular, the present invention relates to a calibration method and system for calibrating an automotive panoramic camera imaging system to eliminate fisheye distortion of images, simplify the internal calibration steps of the camera, and improve installation accuracy. Background technique [0002] See attached figure 1 , the car panoramic camera technology uses four wide-angle cameras at the front, rear, left, and right of the car to extract image signals around the car body, corrects the fisheye distortion of the image through a processing unit, and then performs perspective transformation to convert the image into a top view, and finally rotates and stitches the four images to generate a car body Surrounding top-down video images. Among them, the process of correcting the fisheye distortion of the wide-angle camera and converting the viewing angle into a top view becomes the cal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 贺徵廷程自清
Owner SHENZHEN DACHENG TECH DEV CO LTD
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