Research On Perception Difference Of Landscape Virtual Research Platform Based On Visualization Technology

Landscape visual perception is an important means in landscape planning and design.By collecting people’s perception and evaluation,corresponding planning and design solutions can be given.In recent years,visualization technology has been developing from two-dimensional pictures to three-dimensional models,and the application of VR technology is increasing,but the differences of various visualization technologies applied to visual perception evaluation still need to be studied.This paper takes the old Qiang village in Taoping,Sichuan Province as the research object,and the basic data is obtained by digital surveying and mapping technology and photography,and a virtual model is constructed,and the scene is extracted for public landscape perception evaluation experiment,so as to compare the differences among real-life pictures,point cloud model,UAV true 3D model,virtual modeling model and VR virtual modeling model,investigate and analyze the characteristics of VR tour experience and crowd behavior,and finally apply the virtual research platform based on the research results.The main results are as follows:1)Processing the tilt photography photos of UAV and the point cloud data of 3D laser scanner,sorting out and applying the digital mapping technology for the modeling process of landscape perception.A virtual scene model is built based on digital surveying and mapping,field investigation,photo shooting and other data.Dp-modeler software is used to accurately model the village,and Sketch Up and Enscape software are used to refine the model.The reverse modeling process based on point cloud data and UAV true 3D model is explored,and a scene that can be used for VR virtual roaming is built.2)Fourteen scenes,including seven groups of elements,are extracted and classified according to architecture,traffic,folk culture and water landscape types.Experiments are carried out by using visual carriers such as pictures,digital mapping models and virtual modeling models,combined with VR technology,and the effects of gender,education background and professional background on landscape perception are analyzed,as well as the differences in visual perception evaluation of various visual technologies under different scenes and different landscape types.At the same time,the impression perception differences of various technical groups and the VR tour experience data of people are collected and analyzed.The research found that,firstly,gender,education background and professional background have different effects on landscape perception in different visualization technology groups.Secondly,among all kinds of visualization technologies,the VR experience model scene is closer to the real picture.Thirdly,in the digital surveying and mapping group,the landscape perception scores of point cloud data and true three-dimensional model data are not the same,and the difference in color perception between them is greater than other indicators.Fourthly,from the perspective of public evaluation indicators and landscape types,whether or not VR technology will affect people’s perception.Fifth,compared with other visualization technology groups,VR experience model has the best sense of reality and novelty,but it will deviate from other groups in terms of element impression.Sixth,when the roads are complicated,people tend to visit brighter and wider roads.In VR roaming in complex scenes,people pay more attention to indication information,scenic spot introduction,interaction and auditory experience,and we can improve people’s experience from the above points.3)On the whole,the applicability of SU+Enscape model is better than that of point cloud model and UAV true 3D model,and the application of VR technology will greatly enhance the sense of experience.Based on the research results,three types of virtual research platforms are optimized and applied.