height_width_ratio_xldheight_width_ratio_xldHeightWidthRatioXldHeightWidthRatioXldheight_width_ratio_xld (算子)

名称

height_width_ratio_xldheight_width_ratio_xldHeightWidthRatioXldHeightWidthRatioXldheight_width_ratio_xld — 计算平行于轮廓或多边形坐标轴的封闭矩形的宽度、高度和纵横比。

签名

描述

算子 height_width_ratio_xldheight_width_ratio_xldHeightWidthRatioXldHeightWidthRatioXldHeightWidthRatioXldheight_width_ratio_xld calculates the enclosing rectangle (parallel to the coordinate axes) for each input contour or polygon. The enclosing rectangle is described by the coordinates of the corner pixels (Row1Row1Row1Row1row1row_1,Column1Column1Column1Column1column1column_1,Row2Row2Row2Row2row2row_2,Column2Column2Column2Column2column2column_2) (see smallest_rectangle1_xldsmallest_rectangle1_xldSmallestRectangle1XldSmallestRectangle1XldSmallestRectangle1Xldsmallest_rectangle1_xld). Based on these values, height_width_ratio_xldheight_width_ratio_xldHeightWidthRatioXldHeightWidthRatioXldHeightWidthRatioXldheight_width_ratio_xld computes the width, height, and aspect ratio of the smallest surrounding rectangle as follows:

如果传递多个轮廓或多边形，结果将按其在 XLDXLDXLDXLDXLDxld 中的顺序存储为元组。 In case of an empty contour all parameters have the value 0 if no other behavior was set (see set_systemset_systemSetSystemSetSystemSetSystemset_system).

注意

If , RatioRatioRatioRatioratioratio is set to DBL_MAX (1.797e308).

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

复杂度

若 N 为等轮廓点数，则运行时间复杂度为 O(N)。

结果

height_width_ratio_xldheight_width_ratio_xldHeightWidthRatioXldHeightWidthRatioXldHeightWidthRatioXldheight_width_ratio_xld 在输入不为空时返回 2 ( H_MSG_TRUE )。如果输入为空则可设置行为通过 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

可能的后继

gen_polygons_xldgen_polygons_xldGenPolygonsXldGenPolygonsXldGenPolygonsXldgen_polygons_xld

替代

smallest_rectangle1_xldsmallest_rectangle1_xldSmallestRectangle1XldSmallestRectangle1XldSmallestRectangle1Xldsmallest_rectangle1_xld, smallest_rectangle2_xldsmallest_rectangle2_xldSmallestRectangle2XldSmallestRectangle2XldSmallestRectangle2Xldsmallest_rectangle2_xld, shape_trans_xldshape_trans_xldShapeTransXldShapeTransXldShapeTransXldshape_trans_xld

另见

shape_trans_xldshape_trans_xldShapeTransXldShapeTransXldShapeTransXldshape_trans_xld, smallest_circle_xldsmallest_circle_xldSmallestCircleXldSmallestCircleXldSmallestCircleXldsmallest_circle_xld, elliptic_axis_xldelliptic_axis_xldEllipticAxisXldEllipticAxisXldEllipticAxisXldelliptic_axis_xld, area_center_xldarea_center_xldAreaCenterXldAreaCenterXldAreaCenterXldarea_center_xld

模块

基础