一种顾及视觉层次的电子地图自适应节能显示方法

An adaptive display approach to saving energy of electronic maps with consideration of visual hierarchy

电子地图显示能耗过高是当前地图设计与应用领域亟须解决的问题之一。针对现有电子地图节能显示方法难以保持视觉层次的问题,本文归纳了地图颜色的3种视觉层次结构,设计了视觉层次的定量表达模型,提出了一种电子地图自适应节能显示优化方法。本文方法同时考虑视觉层次质量和地图能耗,将地图节能问题定义为一个“质量-能耗”双目标优化问题,利用启发式搜索算法寻找节能配色方案,在轻微改变地图外观的情况下显著降低显示能耗。将本文方法与语义约束的颜色调整方法进行对比,采用不同比例尺的电子地图设计读图试验。结果表明,本文方法在有效性、效率、颜色一致性方面均优于对比方法,可广泛应用于电子地图、移动导航地图的节能显示,提高设备的续航能力。

The high energy consumption of electronic map display is one of the problems that needs to be solved urgently in the current map design and application field.Aiming at the problem that the existing electronic map energy-saving display methods are difficult to maintain visual hierarchy,this paper summarizes three visual hierarchy structures of map colors,designs a quantitative expression model for visual hierarchy,and proposes an adaptive energy-saving display optimization method for electronic maps.This method considers both visual hierarchy quality and map energy consumption,defines the map energy saving problem as a“quality-energy consumption”dual-objective optimization problem,uses a heuristic search algorithm to find energy-saving color schemes,and significantly reduces display power consumption with slight changes to map appearance.This method is compared with the semantically-enriched method,and a map reading experiment is designed using electronic maps of different scales.The results show that the proposed method is superior to the comparison method in terms of effectiveness,efficiency and color consistency,and can be widely used in the energy-saving display of electronic maps and mobile navigation maps to improve the battery life of the equipment.