使用算子：get_contour_global_attrib_xld(Contour : : Name : Attrib)
query_contour_global_attribs_xld 可用于查询特定的轮廓设置了哪些全局属性
| 'bright_dark' |
每个输出XLD轮廓的转换类型存储在属性“bright_dark”中。如果连接线形成明暗转换(从左到右，从起点到终点)，则将其设置为1.0，否则将其设置为0.0。 示例性XLD轮廓(红色和绿色)沿着整流网格的边缘(从起点到终点的方向由箭头指示)。转换类型存储在属性“bright_dark”中，红色轮廓为1.0，绿色轮廓为0.0。 The attribute 'bright_dark' is added by the following operator: connect_grid_points |
| 'cont_approx' |
轮廓的最佳近似方法由属性'cont_approx'表示:对于'cont_approx'=-1，轮廓的最佳近似方法是用一条线段表示，对于'cont_approx'=0，用一条椭圆曲线表示，对于'cont_approx'=1，用一条圆弧表示。 The attribute 'cont_approx' is added by the following operator: segment_contours_xld |
| 'is_hole' | 对于包含孔的边界，将全局轮廓属性'is_hole'设置为1，否则设置为0。 |
| 'regr_dev_dist' |
轮廓线点与回归线之间(欧几里得)距离的标准差。 The attribute 'regr_dev_dist' is added by the following operator: regress_contours_xld |
| 'regr_dist' |
回归线到图像坐标系统原点的最小距离。 The attribute 'regr_dev_dist' is added by the following operator: regress_contours_xld |
| 'regr_mean_dist' |
包含每个等高线点到回归线之间的欧式距离的平均值。 The attribute 'regr_dev_dist' is added by the following operator: regress_contours_xld |
| 'regr_norm_col' |
回归线单位法向量的列坐标，法向量从原点指向该线。 The attribute 'regr_dev_dist' is added by the following operator: regress_contours_xld |
| 'regr_norm_row' |
回归线单位法向量的行坐标，法向量从原点指向该线。 The attribute 'regr_dev_dist' is added by the following operator: regress_contours_xld |
绘制属性“regr_dist”、“regr_norm_col”、“regr_norm_row”的草图，用于回归XLD轮廓(红色)。'regr_mean_dist'和'regr_dev_dist'是从轮廓线点到回归线(实心黑线)的距离(黑色箭头)计算得到的。