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

The operator 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:

If more than one contour or polygon is passed, the results are stored in tuples in the same order as the respective contours or polygons in XLDXLDXLDXLDXLDxld. 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

复杂性

若 N 为等轮廓点数，则运行时间复杂性为 O(N)。

结果

height_width_ratio_xldheight_width_ratio_xldHeightWidthRatioXldHeightWidthRatioXldHeightWidthRatioXldheight_width_ratio_xld returns 2 ( H_MSG_TRUE) if the input is not empty. If the input is empty the behavior can be set via 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

Foundation