A one-dimensional camera calibration device with only two marker points and its calibration method
A camera and marker point technology, applied in the field of one-dimensional camera calibration devices, can solve the problems of low calibration efficiency, complex calibration process, complicated realization process, etc., and achieve the advantages of improving efficiency, reducing cost, and improving image information processing effect. Effect
Active Publication Date: 2019-06-14
四川巨源科技有限公司
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[0007] In the Chinese invention patent with the publication number CN101957990A applied by Wuhan University on August 13, 2010, a camera calibration method is disclosed. The particle swarm intelligent algorithm is used in the camera calibration step. This method requires a large number of particles As the mark point of the calibration object, and in the process of camera calibration, the camera calibration problem needs to be transformed into a parameter optimization problem through the steps of obtaining template image, assigning parameters, and calculating fitness value, although it can reduce the need for calibration environment and calibration The time requirement improves the calibration accuracy, but the implementation process is complicated
[0008] At present, in the technical field, the one-dimensional calibration object used for camera calibration in the existing literature requires at least three marker points, the calibration process is complicated, and the calibration efficiency is low
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[0039] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with the accompanying drawings.
[0040] Such as figure 1 As shown, a one-dimensional camera calibration device with only two marking points is characterized in that it includes a connecting shaft 1 and two marking points 2 with the same size, and the marking points 2 are fixed at both ends of the connecting shaft 1 , the connecting shaft 1 is smooth without bending, and its length is fixed.
[0041] A calibration method for determining camera internal parameters is characterized in that it comprises the steps of:
[0042] Step 1: Roll the one-dimensional camera calibration device with only two marker points on the flat plate, and obtain the plane where the two calibration points of the calibration device are located through the geometric relationship The infinitely distan...
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The invention discloses a one-dimensional camera calibration device only with two mark points and a calibration method thereof. The one-dimensional camera calibration device only with two mark points comprises a connection shaft and two mark points identical in size. The mark points are fixed on two ends of the connection shaft. The connection shaft is smooth and is not bent, and the length of the connection shaft is fixed. The calibration method provided by the invention is characterized in that five unknown internal parameters of a camera are determined by the one-dimensional camera calibration device only with two mark points and five rolling images arranged on any five unparallel positions of a plane. Compared with an existing one-dimensional camera calibration device with at least three mark points, the one-dimensional camera calibration device can complete calibration with only two mark points identical in size; in addition, by adopting the camera calibration device and method, the camera is rapidly, efficiently and accurately calibrated, and the cost is effectively lowered.
Description
technical field [0001] The invention relates to a camera calibration device and method, in particular to a one-dimensional camera calibration device with only two marking points and a calibration method thereof. Background technique [0002] The main task of computer vision is to use computers, cameras and other equipment to obtain the three-dimensional information of the corresponding scene by processing the collected two-dimensional images. Camera calibration is a necessary step for computer vision to obtain transformation information from two-dimensional images, and the Vision has been extensively studied. [0003] The wide application of computer vision requires that the simpler and more accurate the camera calibration, the better. Camera calibration is to use the two-dimensional image acquired by the camera to obtain the corresponding information in three-dimensional space through a series of conversions. The geometric model parameters used in this conversion process a...
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IPC IPC(8): G06T7/80
CPCG06T2207/30208
Inventor 蒋体钢
Owner 四川巨源科技有限公司