compactness_xldcompactness_xldCompactnessXldCompactnessXldcompactness_xld (算子)

名称

compactness_xldcompactness_xldCompactnessXldCompactnessXldcompactness_xld — 轮廓或多边形紧凑性的形状系数。

签名

描述

算子 compactness_xldcompactness_xldCompactnessXldCompactnessXldCompactnessXldcompactness_xld calculates the compactness of each input contour or polygon in XLDXLDXLDXLDXLDxld. 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 L is the length and F the enclosed area of the contour or polygon the shape factor CompactnessCompactnessCompactnessCompactnesscompactnesscompactness is defined as: The shape factor CompactnessCompactnessCompactnessCompactnesscompactnesscompactness of a circle is 1. If the contour or polygon encloses an elongated area CompactnessCompactnessCompactnessCompactnesscompactnesscompactness is larger than 1. The operator compactness_xldcompactness_xldCompactnessXldCompactnessXldCompactnessXldcompactness_xld responds to the course of the contour or polygon (roughness). If more than one contour or polygon is passed, the shape factors 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 compactness_xldcompactness_xldCompactnessXldCompactnessXldCompactnessXldcompactness_xld 在输入不为空时返回值 2 ( H_MSG_TRUE )。The behavior in case of empty input (no input contours available) is set via the operator 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

替代

circularity_xldcircularity_xldCircularityXldCircularityXldCircularityXldcircularity_xld, convexity_xldconvexity_xldConvexityXldConvexityXldConvexityXldconvexity_xld, eccentricity_xldeccentricity_xldEccentricityXldEccentricityXldEccentricityXldeccentricity_xld, rectangularity_xldrectangularity_xldRectangularityXldRectangularityXldRectangularityXldrectangularity_xld

另见

area_center_xldarea_center_xldAreaCenterXldAreaCenterXldAreaCenterXldarea_center_xld, select_shape_xldselect_shape_xldSelectShapeXldSelectShapeXldSelectShapeXldselect_shape_xld

模块

基础