增强平行坐标技术可视性的研究

平行坐标是数据可视化领域中有着广泛应用的一种技术，为了增强其可视性提出了颜
色比例法以区分相交折线，圆心角映射法展示信息的分布和坐标轴非等值变化显示重点区域详细信息。颜色比例法根据后一区间内直线段的颜色构成情况判断出与前一区间内直线段的对应关系；圆心角映射法展示一定条件下信息在多个维上的分布，将一个分组在相应维上占有的比例映射成对应圆心角的大小；坐标轴非等值变化通过多层焦点的交互控制实现，可以充分利用坐标轴空间，在观察重点区域详细信息的同时保持总体浏览。实验结果表明能够得到较好的可视化效果。
关键词: 平行坐标技术；相交折线；圆心角映射；多层焦点
Abstract: Parallel coordinate is a kind of technology used extensively in data visualization. For
strengthen its visibility, we present color proportion method to distinguish cross poly-lines, central angle mapping method to exhibit information distribution, and axes are not changed equivalently showing the detailed information in the key area. Color Proportion judges the corresponding relation of straight lines in next region and in previous region according to the line color composing information in next region. Central Angle Mapping shows information distribution on multi-dimension under certain conditions, the proportion one group occupying in one dimension corresponds to the size of central angle. The axis is not changed equivalently, through managing multiple focal levels, can fully utilize axis space, keeping overall information while observing detailed information of key area. The experimental results indicate that can get better visual result.
Key words: parallel coordinates; cross poly-lines; central angle mapping; multiple focal levels