Research On The Strategy Of Improving The Vitality Of Street Space In Shuyuan Gate Area Of Xi’an Based On Image Recognition

In the process of urbanization in China,the phenomenon of lack of public space and scale construction often occurs,which leads to the decline of the quality and vitality of urban public space,and even directly affects the vitality and quality of the whole city.Under the theme of updating the stock and focusing on creating the connotation quality,vitality building has become an important topic of urban research.As an important part of urban public space,the demand of social interaction is often ignored,which leads to the separation of people and street life.Especially in the historical area,we should pay more attention to the shaping of street public life and vitality in the choice of protection and development.However,how to quantitatively evaluate the vitality has always been a difficult problem.With the development of information technology,the construction of new data environment is becoming more and more mature,the access to image data is constantly updated,and the technical means of image interpretation are more diversified.It provides a new perspective for the study of recognizing the composition of street space environment and quantitatively evaluating Street vitality through the semantic recognition of street view images.This paper first combs and grasps the basic theory and practical exploration related to street space vitality,grasps the current research direction and shortcomings,and provides reference for this research.Secondly,it is about the construction of the evaluation system of street vitality in this paper,which is carried out from two aspects under the clear composition and source of street vitality.One is the establishment of the evaluation index system of street vitality,which mainly includes index classification and data acquisition.Based on the two dimensions of external representation and constituent elements of vitality,the vitality is embodied as a street semantic factor suitable for the shushumen area and can be quantitatively evaluated,And classified access.The second is the establishment of vitality quantitative evaluation method.Two image recognition methods,SD semantic analysis and deep learning,correspond to the two levels of artificial evaluation and machine evaluation of vitality respectively.The artificial evaluation method obtains people’s psychological perception tendency of high vitality street features through questionnaire survey,and interprets the semantic features of street view data,In order to achieve the artificial score of the vitality of the street in this paper;Machine evaluation is based on visual perception to segment the components of the streetscape image semantically,and takes the number of people gathered as the machine scoring standard.The former reflects the relationship between the vitality and the characteristics of street elements,while the latter reflects the relationship between the vitality and the proportion of street elements through the correlation analysis of street elements.The integration of the two levels can more fully express the comprehensive influence of the composition and characteristics of street elements on the population,and then unify and analyze the differences between the two results,This paper summarizes the influence mechanism and factor characteristics of different types of street vitality,as an important basis for space optimization and vitality promotion.Xi’an shushushumen district is rich in historical and cultural resources and traditional life patterns,which has high research value.This paper takes it as the research object,focuses on obtaining street view images as the data basis of this empirical evaluation system of street vitality,and combines with the investigation of social characteristics such as industry and population in the District,It makes the cognition and solution of the contradiction between the composition and characteristics of shushumen street more comprehensive and targeted.Finally,this paper puts forward the strategies of improving Street vitality,which should be based on the problem orientation,meet the needs of urban residents,and have a certain degree of implementability.At the same time,it should also conform to the development of the times and explore a new direction of shaping Street vitality.The objective of this study is to provide a useful reference for the vitality quantification and the research of historical and cultural block space represented by shushumen District in Xi’an.