Method for calibrating high-precision interior and exterior orientation elements of surveying and mapping camera
A technology of external orientation elements, surveying and mapping cameras, which is applied in the directions of measuring devices, image data processing, 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: 2020-11-20
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 specification and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such ...
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The invention relates to the field of high-precision calibration of surveying and mapping cameras, in particular to a method for calibrating high-precision interior and exterior orientation elements of a surveying and mapping camera, which comprises the following steps of firstly, fixedly connecting a first reference mirror with the surveying and mapping camera, and establishing a parallel light calibration system, based on the parallel light calibration system, adopting a first reference mirror and a parallel light method to calibrate interior orientation elements of the surveying and mappingcamera and obtain a visual camera optical axis, connecting the second reference mirror with an inertial measurement unit IMU to form POS system equipment, establishing a visual POS system equipment measurement reference coordinate system of POS system equipment by adopting a gyroscopic total station, measuring an eccentric angle between the optical axis of the visual camera and a visual POS system equipment measurement reference coordinate system by using theodolite auto-collimation, and calibrating the exterior orientation elements of the surveying and mapping camera based on the eccentric angle. Great convenience is provided for measurement of the surveying and mapping camera and calibration of the interior orientation elements and the exterior 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 particularly relates to a method for calibrating high-precision inner and outer 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, main distance and 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 POS. Measure the calibration of the eccentric angle between the reference coordinate systems. [0003] Because the existing inner and outer orientation element calibration method of the surveying and mapping camera needs to comprehensively ...
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Login to View More 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