gen_polygons_xldgen_polygons_xldGenPolygonsXldGenPolygonsXldgen_polygons_xld (算子)
名称
gen_polygons_xldgen_polygons_xldGenPolygonsXldGenPolygonsXldgen_polygons_xld — 通过多边形近似 XLD 轮廓。
签名
def gen_polygons_xld(contours: HObject, type: str, alpha: Union[float, int]) -> HObject
描述
gen_polygons_xldgen_polygons_xldGenPolygonsXldGenPolygonsXldGenPolygonsXldgen_polygons_xld approximates XLD contours
(ContoursContoursContoursContourscontourscontours) by polygons. The type of the approximation
can be set by TypeTypeTypeTypetypetype. The threshold for the approximation
is set via AlphaAlphaAlphaAlphaalphaalpha. The procedure is able to process open
as well as closed contours. The resulting approximating XLD
polygons are returned in PolygonsPolygonsPolygonsPolygonspolygonspolygons。
Contours can be approximated by the algorithm of Ramer, which
approximates contours such that the Euclidean distance of the
approximating polygon to the contour is at most AlphaAlphaAlphaAlphaalphaalpha pixel
units.
执行信息
- 多线程类型：可重入（与非独占算子并行运行）。
- 多线程作用域：全局（可从任何线程调用）。
- 未采用并行化处理。
参数
ContoursContoursContoursContourscontourscontours (输入对象) xld_cont-array → objectHXLDContHObjectHXLDContHobject
Contours to be approximated.
PolygonsPolygonsPolygonsPolygonspolygonspolygons (输出对象) xld_poly-array → objectHXLDPolyHObjectHXLDPolyHobject *
Approximating polygons.
TypeTypeTypeTypetypetype (输入控制) string → HTuplestrHTupleHtuple (string) (string) (HString) (char*)
Type of approximation.
默认值：
'ramer'
"ramer"
"ramer"
"ramer"
"ramer"
"ramer"
值列表：
'ramer'"ramer""ramer""ramer""ramer""ramer"
AlphaAlphaAlphaAlphaalphaalpha (输入控制) number → HTupleUnion[float, int]HTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)
Threshold for the approximation.
默认值：
2.0
建议值：
1.0, 1.5, 2.0, 3.0, 4.0
限制：
Alpha > 0.0
可能的前趋
gen_contours_skeleton_xldgen_contours_skeleton_xldGenContoursSkeletonXldGenContoursSkeletonXldGenContoursSkeletonXldgen_contours_skeleton_xld,
lines_gausslines_gaussLinesGaussLinesGaussLinesGausslines_gauss,
lines_facetlines_facetLinesFacetLinesFacetLinesFacetlines_facet,
edges_sub_pixedges_sub_pixEdgesSubPixEdgesSubPixEdgesSubPixedges_sub_pix
可能的后继
gen_parallels_xldgen_parallels_xldGenParallelsXldGenParallelsXldGenParallelsXldgen_parallels_xld,
split_contours_xldsplit_contours_xldSplitContoursXldSplitContoursXldSplitContoursXldsplit_contours_xld
另见
get_region_polygonget_region_polygonGetRegionPolygonGetRegionPolygonGetRegionPolygonget_region_polygon
模块
基础