convexity_xldconvexity_xldConvexityXldConvexityXldconvexity_xld (算子)

名称

convexity_xldconvexity_xldConvexityXldConvexityXldconvexity_xld — 轮廓或多边形凸度的形状系数。

签名

描述

算子 convexity_xldconvexity_xldConvexityXldConvexityXldConvexityXldconvexity_xld calculates the convexity for each input contour or polygon. The input contour or polygon must not intersect itself, otherwise the resulting parameter is not meaningful (Whether the input contour or polygon intersects itself or not can be determined with test_self_intersection_xldtest_self_intersection_xldTestSelfIntersectionXldTestSelfIntersectionXldTestSelfIntersectionXldtest_self_intersection_xld). If the input contour or polygon is not closed it will be closed automatically.

Calculation: If is the area of the convex hull and the area enclosed by the original contour or polygon the shape factor ConvexityConvexityConvexityConvexityconvexityconvexity is defined as: The shape factor ConvexityConvexityConvexityConvexityconvexityconvexity is 1 if the contour or polygon is convex (e.g., a rectangle, circle, etc.). If there are indentations ConvexityConvexityConvexityConvexityconvexityconvexity is smaller than 1.

If more than one contour or polygon is passed, the numerical results of the shape factor are stored in a tuple in the same order as the respective contours or polygons in XLDXLDXLDXLDXLDxld。

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）。
• 在元组级别上自动并行化。

参数

结果

算子 convexity_xldconvexity_xldConvexityXldConvexityXldConvexityXldconvexity_xld 在输入不为空时返回值 2 ( H_MSG_TRUE )。当输入为空（无可用输入轮廓）时可设置行为通过算子 set_system('no_object_result',<Result>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)set_system("no_object_result",<Result>)。如有必要，则抛出异常。

可能的前趋

gen_contours_skeleton_xldgen_contours_skeleton_xldGenContoursSkeletonXldGenContoursSkeletonXldGenContoursSkeletonXldgen_contours_skeleton_xld, edges_sub_pixedges_sub_pixEdgesSubPixEdgesSubPixEdgesSubPixedges_sub_pix, threshold_sub_pixthreshold_sub_pixThresholdSubPixThresholdSubPixThresholdSubPixthreshold_sub_pix, gen_contour_polygon_xldgen_contour_polygon_xldGenContourPolygonXldGenContourPolygonXldGenContourPolygonXldgen_contour_polygon_xld, test_self_intersection_xldtest_self_intersection_xldTestSelfIntersectionXldTestSelfIntersectionXldTestSelfIntersectionXldtest_self_intersection_xld

另见

area_center_xldarea_center_xldAreaCenterXldAreaCenterXldAreaCenterXldarea_center_xld, select_shape_xldselect_shape_xldSelectShapeXldSelectShapeXldSelectShapeXldselect_shape_xld, shape_trans_xldshape_trans_xldShapeTransXldShapeTransXldShapeTransXldshape_trans_xld

模块

基础