Three-dimensional space dimension measurement method based on fixed monocular camera
A monocular camera and three-dimensional space technology, which is applied in image enhancement, image analysis, image data processing, etc., can solve problems such as limited application range, low measurement accuracy, and cumbersome measurement methods, and achieve the effect of improving measurement accuracy
Active Publication Date: 2021-06-04
TRAFFIC MANAGEMENT RES INST OF THE MIN OF PUBLIC SECURITY
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[0006] The invention provides a three-dimensional space size measurement method based on a fixed monocular camera, which solves the problems of low measurement accuracy and cumbersome measurement methods with limited scope of application in the related art
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[0042] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0043] In order to enable those skilled in the art to better understand the solutions of the present invention, 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 are only Embodiments of some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0044] It should be noted that the terms "first" and "second...
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The invention relates to the technical field of image monitoring, and particularly discloses a three-dimensional space size measuring method based on a fixed monocular camera, which comprises the following steps: collecting camera internal parameters of the fixed monocular camera in a camera calibration mode; collecting a video image containing a three-dimensional control point target; performing lens distortion correction on the video image containing the three-dimensional control point target according to the camera intrinsic parameters; obtaining image coordinates of a three-dimensional control point target in the video image after lens distortion correction and corresponding object space coordinates; performing camera external parameter calibration of the fixed monocular camera according to the image coordinates of the three-dimensional control point target and the corresponding object space coordinates; and calculating and analyzing the to-be-measured video image according to the camera external parameter calibration to obtain a three-dimensional space size in the to-be-measured video image. The three-dimensional space dimension measurement method based on the fixed monocular camera provided by the invention can improve the measurement precision, and can be suitable for various cameras.
Description
technical field [0001] The invention relates to the technical field of image monitoring, in particular to a method for measuring three-dimensional space dimensions based on a fixed monocular camera. Background technique [0002] At the scene of a criminal crime or a traffic accident, it is very important to obtain the three-dimensional space size information such as the length, width and height of people, vehicles, traces and other objects. Surveillance video is the most intuitive and easiest source of evidence to obtain this information. Due to cost reasons, security monitoring often It is a single appearance, and the image taken by the monocular camera is the imaging of a space object on a two-dimensional plane, and it is impossible to obtain three-dimensional spatial information without auxiliary measurement. [0003] For the measurement of the size of the image taken by the monocular camera, most of the existing methods simply use the linear proportional relationship to ...
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Login to View More IPC IPC(8): G06T7/60G06T7/80G06T5/00
CPCG06T7/60G06T7/80G06T2207/10016G06T5/80
Inventor 宋耀鑫李平凡严永高岩李毅赵冬
Owner TRAFFIC MANAGEMENT RES INST OF THE MIN OF PUBLIC SECURITY