室内POI显著度评价的Fisher判别法模型

An indoor fisher discriminant model for indoor POI salience evaluation

随着社会经济的快速发展,大型建筑物内部结构越来越复杂,室内空间的位置服务愈显重要。地标作为室内空间中的基础要素,能够帮助人们在室内认清方向和定位。但是,现有的室内地标的选取方式大多牵引于室外准则,未考虑室内POI独有的特点,导致所选取出的地标与用户的认知不匹配。针对这一问题,本文在室内空间POI显著度影响因素探究试验基础上,采用Fisher判别法(FDA)对试验数据进行语义信息量化、构建模型、模型回判和交叉互判处理,确定了室内POI显著度评价模型,并用于室内地标的提取。结果表明,建立的判别模型对室内POI显著度的判别和分级效果显著,选取出的地标能够与用户认知结果相一致。

In the rapid development of the social economy,the structure of large buildings is more and more complex,and people are easily lost in it,so the indoor location service becomes increasingly significant.Landmarks are the basic elements of the indoor space that can help people recognize the indoor orientation and location.However,many existing methods of indoor landmark selection ignore the unique features of indoor POIs and are guided by the outdoor criteria,resulting in a mismatch between the selected landmarks and users cognition.The paper adopts the fisher discriminant analysis(FDA)for the above problem to process test data from the experiment of exploring factors affecting indoor POIs salience,including quantifying semantic information,building model,model self-judgment and cross-validation.And the model of indoor POI salience evaluation is confirmed to select indoor landmarks.The results indicated that the established model significantly affects discriminating and classifying indoor POI s salience,and the selected landmarks can be consistent with the user s cognitive results.