Research On Illegal Building Detection Technology Based On Drone Tilt Photogrammetry

Factors such as the upgrade of building materials and the reduction in the difficulty of building construction have continuously accelerated the construction of illegal buildings.However,the traditional illegal building detection and investigation and demolition and rectification are insufficient in terms of speed and efficiency,and the illegal building data is accurate,complete,There is a lack of data information richness.Therefore,there is an urgent need for a new method for the detection of illegal buildings that is efficient,stable,accurate,and convenient for data mining and analysis to achieve the effects of accelerating the detection speed,reducing manpower and material resources,and strengthening the crackdown on illegal buildings,and completing the reduction of accidents caused by illegal buildings.The incidence rate and the purpose of beautifying the living environment need to innovate the application of illegal building detection technology in the field of surveying and mapping,eliminate the difficulties of difficult forensics and surveying of illegal buildings,and verify the accuracy and innovation of new technologies in the field of illegal building detection.Survey methods for illegal buildings.To this end,this article uses the characteristics of a variety of data by using the UAV tilt photogrammetry technology to obtain orthophoto maps,digital surface models and point cloud data,using existing features of ground imaging,remote sensing image interpretation technology,3D and Two-dimensional data joint acquisition technology,point cloud data processing technology,programming algorithm and data analysis technology provide technical support for illegal building detection.Carried out the following research:(1)On the basis of in-depth study on the rule of texture features of illegal buildings,collect building patches according to the features of ground imaging on orthophotos,compare and analyze the results of the two-phase image interpretation and analyze the types of building changes,combined with cadastral maps,etc.There are already legal building materials to detect illegal buildings;(2)In the three-dimensional model of oblique photography,based on the study of the distribution rules of illegal buildings,the characteristics of building information can be collected by using the linkage of two-dimensional and three-dimensional images in the same period,together with the legal building electronic vector data to draw a picture,grid Collect illegal building data in the networked sharding area;(3)Based on the real three-dimensional model,the DSM data is generated using the editable features of point cloud data,and the two-phase data is used to classify the type of building change using the height difference of the building change,and the illegal buildings in each type are obtained according to the legal building information.