compactness_xldcompactness_xldCompactnessXldCompactnessXldcompactness_xld (算子名称)

名称

compactness_xldcompactness_xldCompactnessXldCompactnessXldcompactness_xld — Shape factor for the compactness of contours or polygons.

参数签名

描述

The operator 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.

运行信息

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Automatically parallelized on tuple level.

参数表

结果

The operator compactness_xldcompactness_xldCompactnessXldCompactnessXldCompactnessXldcompactness_xld returns the value 2 ( H_MSG_TRUE) if the input is not empty. 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>). If necessary an exception is raised.

可能的前置算子

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

可替代算子

circularity_xldcircularity_xldCircularityXldCircularityXldCircularityXldcircularity_xld, convexity_xldconvexity_xldConvexityXldConvexityXldConvexityXldconvexity_xld, eccentricity_xldeccentricity_xldEccentricityXldEccentricityXldEccentricityXldeccentricity_xld, rectangularity_xldrectangularity_xldRectangularityXldRectangularityXldRectangularityXldrectangularity_xld

参考其它

area_center_xldarea_center_xldAreaCenterXldAreaCenterXldAreaCenterXldarea_center_xld, select_shape_xldselect_shape_xldSelectShapeXldSelectShapeXldSelectShapeXldselect_shape_xld

模块

Foundation