| Mountain skyline is a direct portrayal of the relationship between natural environment and artificial environment,and its careful construction has become an important issue to improve the quality of urban space and highlight the urban style.How to reconcile the contradiction between landscape protection and urban development interests is a realistic problem in the urban design control of mountain scenery skyline,which needs to be solved by a refined design control method.However,the current mountain skyline design control based on the rule of thirds is limited by the lack of theoretical research on the law of visual perception behind it,and it is difficult to balance the dispute of "rigidity and elasticity" and control the change of "individuation and standardization" in the actual use.Therefore,the key to solve the design control problem of mountain skyline lies in the exploration of the visual perception law behind it.Based on the above thinking,this study,starting from the interpretation of the principle of visual perception,elaborates the three dimensions of visual perception research,namely vision,aesthetics and meaning,and establishes the aesthetic preference evaluation method and image cognition evaluation method respectively.Evaluation experiment research with the method of scene simulation and modeling photos stimulation,around three points to the laws of the specific control problem,to view window height,scene window width,view window location for experimental control variable space,view window size,ratio of composite variables,visibility,mountain contour level visibility for indirect variable,form seven variable structure.Through the evaluation of experimental results,the influence of different spatial combinations of mountain skyline on the public aesthetic preference and image cognition was discussed,and the aesthetic preference and image cognition laws of mountain skyline were summarized.Furthermore,the visual law and control optimization were further discussed,and the refined design control suggestions were put forward.The main research conclusions of this paper are as follows: 1)The principle of mountain skyline control based on the rule of thirds is derived from the theory of visual perception,and its research includes three core dimensions: vision,aesthetics and meaning;2)There is no difference of crowd characteristics in the aesthetic preference law of the aesthetic dimension of mountain scenery skyline,and there is a common aesthetic standard.In order to achieve a better evaluation of aesthetic preference,the effective combination of the spatial form of the mountain and the buildings in the mountain-view skyline can be achieved.The size of window,mountain level and mountain contour had the most important influence on the evaluation of aesthetic preference of mountain scenery skyline,and the mountain contour was the decisive factor for the evaluation of aesthetic preference.3)The image cognition law of the meaning dimension of mountain landscape skyline has the same trend among the crowd characteristics of different genders,living environment and building height,and "varies from person to person and from place to place".Different spatial combination relations correspond to different image cognition results.Window height and mountain level are the most important influencing factors in image cognition evaluation of mountain skyline.4)Although the aesthetic and image of the mountain skyline have different space building logic,they are coordinated and mutually promoted.Aesthetic preference is closely related to the naturalness,friendliness and recognition of images.The naturalness of space image and the recognition of symbol image contribute to the improvement of the evaluation of aesthetic preference,while the public aesthetic preference and the social image of mountain scenery skyline show the characteristics of "liking the new" and "liking the old".5)Research and construct the design control framework of three-dimensional collaboration and subjective and objective interaction of "space-aesthetic-image",put forward the idea of perfecting the spatial fine design control with the design control matrix of multi-dimensional value,summarize the design control reference indexes,and put forward suggestions for the optimization of the rule of thirds. |
