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Drop point positioning method based on multi-direction projection

A positioning method and multi-directional technology, applied in the field of image processing, can solve the problem that the camera system cannot accurately record the location of the impacting object, and achieve a highly practical effect

Active Publication Date: 2020-02-07
DALIAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the camera system cannot accurately record the falling point position of the fast-moving impacting object

Method used

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  • Drop point positioning method based on multi-direction projection

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with specific examples.

[0019] (1) Adjust the multi-directional projection positioning system. Four illumination light sources 1 are distributed on the four vertices of the target surface 2, their irradiation direction is aligned with point O of the target surface 2, and the position of the camera 4 is fixed at the position facing the target surface 2.

[0020] (2) The camera system acquires 50 frames of projection images on the target surface during the impact process at a capture speed of 30 frames / s.

[0021] (3) Take the shooting time of the first frame of projected image as the time starting point t 1 , then the time of the i-th frame image is t i =f*i(1≤i≤50), so as to obtain the time t corresponding to each frame of image i .

[0022] (4) Calculate the moment t when the object hits the target surface according to the projection 0 . The four projections on the first frame image collected ...

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Abstract

The invention discloses a drop point positioning method based on multi-directional projection, and belongs to the technical field of image processing. The method is realized based on a multi-directionprojection positioning system and comprises n illumination light sources and a camera which are symmetrically distributed, the illumination light sources provide light to converge at the geometric center of a target surface, and the camera directly faces the target surface. The method comprises the following steps that firstly, when an impact object is about to reach a target surface, a camera records m frames of projection images on the target surface in the impact process, and the moment ti corresponding to each frame of image is obtained; secondly, in the obtained m frames of images, a projection endpoint capable of clearly displaying an impact object is selected in each frame of image, is calculated the distance between the projection endpoints of the impact object in each frame of image, an impact object projection endpoint distance-time scatter diagram is drawn and the moment t0 is acquired when the object impacts the target surface; and finally, drop point position coordinatesis solved. The method breaks away from the limitation of the capture speed of the camera, solves the problem that the impact object shields the impact position in the camera shooting process, can calculate the more accurate drop point position, and is safe, reliable and high in practicability.

Description

technical field [0001] The invention belongs to the technical field of image processing, in particular to a method for locating landing points based on multi-directional projection. Background technique [0002] The image acquisition and processing system of the impact recognition device will have the following problems in practical applications: [0003] First, the camera system may not be able to capture the image of the object staying at the impact location due to the limited speed of camera capture. When the moving speed of the object is very fast, the time it stays at the impact position is extremely short, and the camera system cannot capture the instantaneous shot at the moment of impact, so the image processing system cannot perform subsequent information processing. [0004] Secondly, considering the cost of the camera, in the image acquisition and processing system of the impact recognition device, the number of cameras is limited and the position is fixed. Theref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/77
CPCG06T7/77
Inventor 邹德岳周嘉源陈子众韩慧
Owner DALIAN UNIV OF TECH
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