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High-precision calibration method of handheld multi-lens camera

A calibration method and technology of multi-eye cameras, applied in the field of high-precision calibration of handheld multi-eye cameras, can solve the problems of inability to reconstruct and measure camera parameters in three dimensions, long calculation time, inaccurate calibration parameters, etc.

Inactive Publication Date: 2016-05-11
深圳创客帝国教育技术有限公司 +1
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Problems solved by technology

[0004] The existing hand-held camera calibration methods basically use the self-calibration algorithm, but the self-calibration algorithm has the disadvantages of long calculation time, inaccurate calibration parameters, and poor stability, which makes the camera parameters obtained by the hand-held camera calibration method based on the self-calibration method unusable. for precise 3D reconstruction and measurement

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Embodiment approach

[0076] The specific embodiment of the present invention also provides the third preferred embodiment of the present invention. The third preferred embodiment of the present invention adopts curve fitting and infinite approach method to obtain the center point of each contour. The specific method can be as follows:

[0077] The curve fitting method is a method of infinitely approaching the center of the circle by using the geometric properties of the circle. Such as Figure 6 As shown, starting from any point P inside the circle, a chord of the circle intersects the circle at two points and passes through the middle point P of the chord. 1 Repeat the above steps to make any string, it is easy to see that OP 1 > OP 2 , because in a right triangle the length of the hypotenuse is greater than the length of the leg. The center is in a state of convergence, that is to say, each time the above steps are repeated, the center of the string will get closer to the center of the circle...

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Abstract

The invention belongs to the field of images, and provides a high-precision calibration method of a handheld multi-lens camera. The high-precision calibration method comprises the steps of performing preprocessing on an original picture, thereby obtaining an edge contour; fitting all contours for obtaining the central point and area of each contour; detecting the points which satisfy a collinear relationship in all central points, and packing four collinear points to one set; selecting correct image coordinate points from the points which satisfy the collinear relationship according to a cross ratio invariance relationship in projective geometry; and calibrating world coordinate points according to a Zhang's camera calibration method. The high-precision calibration method has advantages of accurate three-dimensional reconstruction and accurate measurement.

Description

technical field [0001] The invention belongs to the field of images, in particular to a high-precision calibration method for a hand-held multi-eye camera. Background technique [0002] With the development of 3D technology, 3D models have important applications in many fields, such as animation, games, Web3D network display, 3D printing, etc. The 3D reconstruction based on digital camera is an important and convenient means to obtain 3D model, and the calibration of the camera network composed of cameras is an important and complicated problem. [0003] Traditional camera calibration algorithms usually use a checkerboard calibration board. Koch proposed a hand-held camera calibration method in Calibration of Hand-held Camera Sequence for Plenoptic Modeling (ICCV1999), which shoots video around objects with a hand-held camera, and achieves camera calibration and three-dimensional data recovery by extending the method of recovering structure from motion. In Hand-held acquis...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 吴晓军陈文娟刘智高
Owner 深圳创客帝国教育技术有限公司
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