A Calibration Method of High-precision Inner and Outer Orientation Elements for Surveying and Mapping Cameras
A technology of external azimuth elements and surveying and mapping cameras, which is applied in the direction of measuring devices, image analysis, instruments, etc., can solve problems such as the need for field flight, save time and economic costs, and avoid the effect of calibration methods
Active Publication Date: 2022-03-22
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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[0004] This application provides a method for calibrating the high-precision inner and outer orientation elements of a surveying and mapping camera, which realizes the calibration of the inner and outer orientation elements of the surveying and mapping camera on the ground, aiming at at least to a certain extent solving the problem of calibration of the existing surveying and mapping camera's outer orientation elements. Technical issues requiring field flights
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[0053] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0054] It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such...
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This application relates to the field of high-precision calibration of surveying and mapping cameras, and specifically relates to a calibration method for high-precision internal and external orientation elements of a surveying and mapping camera. In this method, the first reference mirror is fixedly connected to the surveying and mapping camera, and a parallel cursor calibration system is built; based on parallel The cursor calibration system uses the first reference mirror and the parallel light method to calibrate the internal orientation elements of the surveying and mapping camera and obtain the optical axis of the visualized camera; then connect the second reference mirror and the inertial measurement unit IMU to form a POS system device; The station instrument establishes the visual POS system equipment measurement reference coordinate system of the POS system equipment; then uses theodolite autocollimation to measure the eccentricity angle between the visual camera optical axis and the visual POS system equipment measurement reference coordinate system, and based on the eccentricity angle Calibrate the outer orientation elements of the surveying and mapping camera, and provide great convenience for the measurement of the surveying and mapping camera and the calibration of the inner and outer orientation elements by establishing a visual surveying and mapping camera coordinate system and a POS measurement reference coordinate system.
Description
technical field [0001] The application belongs to the field of high-precision calibration of surveying and mapping cameras, and in particular relates to a calibration method of high-precision internal and external orientation elements of a surveying and mapping camera. Background technique [0002] The precise calibration of the inner and outer azimuth elements is the key to realize the high-precision measurement of the surveying and mapping camera. The calibration of the inner azimuth elements mainly refers to the calibration of the main point, the main distance and the distortion coefficient of the surveying and mapping camera. The calibration of the outer azimuth elements mainly refers to the coordinate system of the surveying and mapping camera and the POS Calibration of the eccentricity angle between the measurement reference coordinate systems. [0003] Since the existing calibration method of the internal and external orientation elements of the surveying and mapping ...
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IPC IPC(8): G01C25/00G06T7/80
CPCG01C25/00G06T7/80
Inventor 远国勤郑丽娜张洪文丁亚林
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI