地图图像视觉平衡质量的定量测度模型

The quantitative model of visual balance quality based on map image

针对地图图面设计制作的统一协调性在定量评判分析上具有不确定性及其视觉平衡质量的衡量指标缺乏的问题,该文采用图像处理领域的灰度分布均衡方法及力矩平衡原理,提出了一种定量测度地图图像视觉平衡质量的新模型。实验结果表明,该模型简单易行,同时适用于矢量地图和影像地图视觉平衡判定,相比于传统评价模型,不仅可定量判断出地图图像是否达到视觉平衡,而且可据视觉平衡质量的衡量指标对地图图像视觉平衡质量排序,还可给出未达视觉平衡地图图像其视觉重量在横纵轴的偏重情况。

According to the problems of map design that it is not certain to quantitatively evaluate the coordination and cooperation,and lack of measures of visual balance quality,this paper proposes a new model that quantitatively measuring the visual balance quality of maps based on the equalization of grayscale distribution and the principle of moment balance.The results indicate that this method is very effective,simple and easy for quantitative measure on the visual balance quality of vector maps and image maps,compared to the traditional methods,this model can not only quantitatively determine whether the map image achieves visual balance,but also sorts the visual balance of the map images,and also gives the offset situation on vertical and horizontal axis for the image without visual balance.