| With the development of computer vision technology,monocular vision technology has gradually extended from static image recognition and dynamic behavior recognition to target positioning and measurement.Due to the lack of parallax in monocular vision,it can only convert three-dimensional targets into two-dimensional images.Therefore,the conventional monocular vision method can only achieve two-dimensional positioning,which is very difficult to achieve three-dimensional positioning.Firstly,starting from the monocular ranging method,a three-dimensional positioning model based on monocular vision is established.Compared with the traditional three-dimensional target positioning model,this model has greatly improved the accuracy and practicability of positioning.This paper has carried out the following research work:1.Based on the principle of small hole imaging,the three-dimensional model of ranging and target positioning is established.Target 3D positioning model is divided into relative target 3D positioning model and absolute target 3D positioning model.The relative target3 D positioning model is to establish a 3D coordinate system with the camera as the origin through geometric relationship,so as to obtain the plane relative position of the target object.The accuracy of indoor relative three-dimensional positioning model is more than 95%,and that of outdoor relative three-dimensional positioning model is more than 92%.2.The absolute target 3D positioning model obtains the longitude and latitude of the target object by calculating the longitude and latitude of the camera and the plane coordinates of the target object.This is not available in the traditional three-dimensional target positioning.It can be applied to unmanned vehicles,UAVs and other fields,and the longitude and latitude of the target object in the field of vision can be shared to people through the network.For example,UAV is used to determine the location of rat hole.The error of this model is within 5m.3.The height of the target object can be obtained through the target three-dimensional positioning model,and the indoor accuracy of height measurement is more than 94%;The accuracy of height measurement in outdoor is more than 92%. |
