A landmark extraction method for indoor emergency evacuation under earthquake scenarios
Indoor landmarks play a crucial role during the process of evacuation because of their significant guiding functions.Addressing the limitations of traditional indoor landmark extraction methods in emergencies,a comprehensive significance evaluation model of indoor landmarks is proposed in this paper,using a seismic scenario in large urban complex as an example.Firstly,a significance evaluation index system for indoor landmarks is established based on four primary indicators:contextual significance,visual significance,user attribute significance,and spatial significance.Secondly,the AHP-CRITIC-ICM combined weighting method is employed to determine the weights of the indicators respectively and then construct the comprehensive significance evaluation model.Subsequently,indoor landmarks are extracted hierarchically according to their comprehensive significance.Experimental results in VR scenarios demonstrate that the extraction accuracy of the model reaches 81.46％,which is better than that of traditional models.The model can provide critical information for users in large indoor emergency evacuations.It has important practical significance for indoor evacuation map design.
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