Method and system for visual measurement of stereoscopic field of view and correction of vertical aberration and axial aberration
A technology for aberration correction and visual measurement, used in measurement devices, photogrammetry/video measurement, image analysis, etc.
Active Publication Date: 2020-06-26
CHINA AGRI UNIV
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Therefore, it is urgent to provide a method that can solve the problem of non-parametric nonlinear uncertainty calibration of 3D visual measurement data caused by optical system errors in the stereoscopic field of view.
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[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0026] Such as figure 1 As shown, it is a schematic flow chart of the stereoscopic field of view vision measurement and vertical axis aberration and axial aberration correction method provided by the embodiment of the present invention, including:
[0027] S1, based on the corresponding relationship between the world coordinate system and the ima...
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The embodiment of the invention provides a method and system for stereoscopic field vision measurement and vertical axis aberration and axial aberration correction. The method comprises: on the basisof a correspondence relationship between a world coordinate system and an image plane coordinate of a calibration plate corner point, constructing a space-image plane error indexing mapping table, andestablishing a stereoscopic field vertical axis aberration calibration model; establishing a stereoscopic field axial aberration calibration model based on an axial aberration rotation calculation method; and constructing a vertical axis aberration calibration model and an axial aberration calibration model in the stereoscopic field by using a focal length as a variable, establishing a world coordinate system based on a pan / tilt or hand-eye system and an affine coordinate system, carrying out beam adjustment measurement of forward intersection, and adding image point error iteration correction with an estimated distance parameter as an initial value in the measuring process. Therefore, a problem of nonparametric nonlinear uncertainty calibration of the three-dimensional visual measurementdata caused by the optical system in the stereoscopic field of view and a problem of being lack of control point for accurate front intersection measurement are solved.
Description
technical field [0001] The invention relates to the technical field of digital photogrammetry, and more particularly, to a method and system for visual measurement of stereoscopic field of view and correction of vertical and axial aberrations. Background technique [0002] With the rapid development of modern system integration technology and agricultural information acquisition technology in the field of precision agriculture, related phenotypic measurement, operational mechanical quantity detection, geometric quantity detection and structural testing in agriculture and other social industries have a great impact on the high-throughput, The requirements for no standard, no contact, low cost, high precision and networking are getting higher and higher. The visual measurement system has these advantages and is playing an increasingly important role in the measurement work in agriculture and other fields of society. Digital photogrammetry combined with digital image analysis m...
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IPC IPC(8): G01C11/00G01C25/00G06T7/80G06F17/11
CPCG01C11/00G01C25/00G06F17/11G06T7/80G06T2207/30204G06T2207/30244
Inventor 王建仑张成林刘文生苏日娜姜良宇卜一译
Owner CHINA AGRI UNIV