query_contour_global_attribs_xld 可用于查询特定的轮廓设置了哪些全局属性,总共有下述属性:
参考属性值:
- 'regr_norm_row',
- 'regr_norm_col',
- 'regr_mean_dist',
- 'regr_dev_dist',
- 'cont_approx',
- 'bright_dark',
- 'is_hole'
与之关联算子是:get_contour_global_attrib_xld(Contour : : Name : Attrib),其中的Name就是上面属性。
下列表格详细说明它们。
?'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。?
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