A three-camera high-precision visual measurement method and device
A visual measurement, three-lens technology, applied in the field of visual measurement, can solve the problems of high equipment cost, corresponding relationship, and insufficient calculation accuracy, and achieve the effect of low cost and light weight
Active Publication Date: 2022-01-28
湖南交工智能技术有限公司
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Therefore, if two high-precision cameras are directly used for measurement in this task, not only will the cost of the equipment be extremely high, but the weight of the equipment will be greatly increased. Man-machine as the carrier), it will not work; if two sets of low-cost, low-pixel cameras are selected, the calculation accuracy for the width will be far from reaching
Of course, there is also a combination of laser radar and monocular camera, but the cost of laser radar is higher, and the corresponding relationship between the starting point and the point cannot be established between the depth data of the laser radar and the image acquired by the camera, and the depth cannot be said to correspond to the image. At the point in , there will be a huge calculation error
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[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0037] see figure 1 , figure 1 It is an installation schematic diagram of an embodiment of a trinocular camera of a three-lens high-precision visual measurement method, specifically:
[0038] The installation of the trinocular camera is as follows: figure 1 As shown, the device system is composed of two low-cost, low-resolution cameras 101, 103 and a high-resolution camera 102, which are installed on the connector 100 together. It is necessary to ...
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The present application discloses a three-lens high-precision visual measurement method and device. The three-lens high-precision visual measurement method includes: taking pictures of the target through the middle lens and performing monocular camera calibration; through the left lens and the The lens on the right side takes pictures of the target and calculates the depth of the binocular camera; performs reprojection calculation on the result of the depth calculation of the binocular camera and the calibration result of the monocular camera, and obtains the calibration result of the monocular camera. Each pixel corresponds to the depth information obtained by the depth calculation of the binocular camera; and the size of the target is calculated. This application uses a low-resolution binocular and a high-precision monocular camera, which is low in cost and light in weight, and can be similar to the calculation accuracy of two identical high-resolution cameras.
Description
technical field [0001] The present application relates to the field of visual measurement, in particular to a three-lens high-precision visual measurement method and device. Background technique [0002] In the field of visual measurement, once the measurement of size is involved, the distance (depth information) of the target relative to the camera must be known or calculated indirectly. That is to say, in the entire size measurement process of unknown depth information, two calculation processes are required: 1. Depth calculation; 2. Size calculation. These two processes have different requirements for camera resolution. For example, in the field of bridge crack measurement, the measurement accuracy of the crack width is required to reach 0.1 mm, but the measurement accuracy requirements for the depth are not so high. Therefore, if two high-precision cameras are directly used for measurement in this task, not only will the cost of the equipment be extremely high, but the...
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IPC IPC(8): G01B11/00
CPCG01B11/00
Inventor 赵健康刘传奇吴向东董星煜徐立成
Owner 湖南交工智能技术有限公司