基于视觉追踪的导向标志评价体系设计

Evaluation System of Guidance Signs Based on Visual Tracking

为优化枢纽导向标志的设计,提高导向标志设置的效益,提出了一种定量评价体系,该体系以使用者寻路行为为研究对象,将视觉追踪的方法应用于寻路实验,从“点、线、面”3个层次,结合单块标志视认指标、流线标志设置评价、区域标志整体评价,构建导向标志评价体系。基于该评价体系,以南京南站内导向标志为研究对象,设计改进型的寻路实验方案,通过对50名调查对象共计100条实验线路的测试结果分析,提取眼动仪记录数据中受试者注视点位置、持续时间、轨迹、扫视时间等数据,得到南京南站导向标志综合评价值为76.06,并根据各层次评价结果对导向标志系统存在的问题提出了针对性的优化建议。该导向标志评价体系基于视觉追踪技术对传统寻路实验进行了技术迭代,进一步细化了指标权重,最终形成了立体评价层次体系。实验结果表明,该评价体系对于公共建筑导向标志的设计与改善具有较好的适用性与指导性。

In order to optimize the guidance sign design of the hub and improve the effectiveness of the setting of guidance signs, a quantitative evaluation system was proposed. The user’s path-finding behavior was taken as the research object in the system, and the method of visual tracking was introduced into the path-finding experiment. Together with the visual recognition index of single block sign, evaluation of streamline sign setting and overall evaluation of regional signs, the evaluation system of guidance sign was established from point, streamline and the overall. Based on the evaluation system, taking Nanjing South Railway Station as an example, improved path- finding experiment plan was designed. The survey results of 100 experimental lines from 50 respondents were analyzed. The position of fixation point, duration, trajectory, scanning time and other data of the subjects in the eye tracker were extracted. The comprehensive evaluation value of guidance sign of Nanjing South Railway Station was 76.06. According to the evaluation results at all levels, targeted optimization suggestions were put forward for the problems existing in the guidance sign system. The guidance sign evaluation system was based on the visual tracking technology to technically iterate the traditional path-finding experiment, further refine the index weights, and finally form a steric evaluation hierarchy. It proves that this evaluation system has good applicability and instructive to the design and improvement of guiding signs for public buildings.