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Camera interior orientation element calibration device and method based on array star points

A technology of internal orientation elements and calibration devices, applied to measuring devices, instruments, etc., to achieve the effects of saving production or purchase costs, eliminating influences, and improving calibration accuracy

Active Publication Date: 2019-11-26
西安应用光学研究所
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Problems solved by technology

[0007] The present invention aims at the problems existing in the calibration method of the orientation elements in the camera, and proposes a calibration device and method for the orientation elements in the camera based on array star points, so as to improve the calibration efficiency and calibration accuracy of the orientation elements in the camera

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  • Camera interior orientation element calibration device and method based on array star points
  • Camera interior orientation element calibration device and method based on array star points
  • Camera interior orientation element calibration device and method based on array star points

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Embodiment Construction

[0046] Embodiments of the present invention are described in detail below, and the embodiments are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0047] refer to figure 1 , the present invention is based on array star point calibration device for in-camera azimuth elements, comprising: light source 10, m×n array star point reticle 20, collimator 30, air flotation vibration isolation table 40, lifting workbench 50. Wherein, the m×n array star reticle 20 is used to form the m×n array star point image in the camera 60 to be marked by the collimator 30, and the array star point image formed by it is full of the field of view of the camera to be marked; The tube 30 is used to simulate the imaging of the camera to be marked to the infinite star point reticle target, and its focal length should be greater than the focal length of the camera 60 to be marked; Its influence: the elevating table 50 is used to sup...

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Abstract

The invention provides a camera interior orientation element calibration device and method based on array star points. The calibration device comprises a light source, an m*n array star point reticle,a collimator, a vibration isolation bench and a lifting workbench. The m*n array star point reticle is used for forming an m*n array star point image in a camera to be calibrated through the collimator, and a field of view of the camera to be calibrated is filled with the formed array star point image. The collimator is used for simulating the camera to be calibrated to image an infinite star point reticle. An air floatation vibration isolation bench is used for supporting and installing the collimator. The lifting workbench is used for supporting the camera to be calibrated to image the m*narray star points in the collimator. And according to pixel coordinate values of the array star points in an imaging plane, an object image geometric relationship between the array star points and star point images is established, and a camera interior orientation element and a distortion coefficient are solved. A high-precision angle measurement rotary table is not needed to carry out angle measurement, manufacturing or purchasing cost of the high-precision angle measurement rotary table is saved, and an influence of a rotary table angle measurement error on camera calibration precision is eliminated.

Description

technical field [0001] The invention belongs to the technical field of aerial photography surveying and mapping camera calibration, and in particular relates to a device and method for calibrating azimuth elements in a camera based on array star points. Background technique [0002] When studying the spatial position of the object by means of aerial photography measurement, in order to make the image information correctly describe the object in space, the camera must be calibrated precisely. Obtaining internal orientation elements such as the principal point, principal distance and distortion of the surveying and mapping camera through calibration is a necessary condition for realizing high-precision aerial photography. [0003] At present, the laboratory orientation elements of telephoto aerial photogrammetry cameras are generally calibrated by precise goniometric methods. The device to realize this method mainly includes: light source, collimator, camera to be marked, pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 刘吉龙王惠林梁冰刘栋王冠陈鸣李涛
Owner 西安应用光学研究所
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