Return the names of the defined global attributes of an XLD contour.

::query_contour_global_attribs_xld returns the names of the globally defined attributes of an XLD contour Contour in Attribs. Global attributes are additional values defined for each contour, e.g., the normal vector of the regression line of a contour ('regr_norm_row' and 'regr_norm_col'). Operators which define this kind of attributes contain a description of the name and semantics of the defined values. ::get_contour_global_attrib_xld can be used to access the value of a particular attribute.

::lines_gauss, ::lines_facet, ::edges_sub_pix

::get_contour_global_attrib_xld, ::get_contour_attrib_xld, ::query_contour_attribs_xld

Sub-pixel operators