smooth_contours

Herror ::smooth_contours_xld ( Hobject Contours, Hobject *SmoothedContours, const HTuple &NumRegrPoints ) HXLDContArray HXLDContArray::SmoothContoursXld ( const HTuple &NumRegrPoints ) const

Smooth an XLD contour.

::smooth_contours_xld smooths the input XLD contours Contours and returns the smoothed contours in SmoothedContours. The smoothing is done by projecting the contours' points onto a local regression line (i.e. a least-squares approximating line), which is computed from NumRegrPoints on each side of the current contour point. This operator should be called, for example, before contours are scaled.

Parameters

`Contours` (input_object)	xld_cont-array `->` Hobject: HXLDContArray
Contour to be smoothed.

`SmoothedContours` (output_object)	xld_cont-array `->` Hobject : HXLDContArray*
Smoothed contour.

`NumRegrPoints` (input_control)	integer `->` HTuple.long
Number of points used to calculate the regression line.
Default value: 5
Suggested values: 3, 5, 7, 9
Restriction: `(NumRegrPoints >= 3) && odd(NumRegrPoints)`

Possible Predecessors

::gen_contours_skeleton_xld, ::lines_gauss, ::lines_facet, ::edges_sub_pix

Possible Successors

::affine_trans_contour_xld, ::gen_polygons_xld, ::local_max_contours_xld

See also

::get_contour_xld

Module

Sub-pixel operators