smallest_rectangle2_xldsmallest_rectangle2_xldSmallestRectangle2XldSmallestRectangle2Xld (Operator)
Name
smallest_rectangle2_xldsmallest_rectangle2_xldSmallestRectangle2XldSmallestRectangle2Xld — Smallest enclosing rectangle with arbitrary orientation of contours or
polygons.
Signature
Herror smallest_rectangle2_xld(const Hobject XLD, double* Row, double* Column, double* Phi, double* Length1, double* Length2)
Herror T_smallest_rectangle2_xld(const Hobject XLD, Htuple* Row, Htuple* Column, Htuple* Phi, Htuple* Length1, Htuple* Length2)
void SmallestRectangle2Xld(const HObject& XLD, HTuple* Row, HTuple* Column, HTuple* Phi, HTuple* Length1, HTuple* Length2)
void HXLD::SmallestRectangle2Xld(HTuple* Row, HTuple* Column, HTuple* Phi, HTuple* Length1, HTuple* Length2) const
void HXLD::SmallestRectangle2Xld(double* Row, double* Column, double* Phi, double* Length1, double* Length2) const
static void HOperatorSet.SmallestRectangle2Xld(HObject XLD, out HTuple row, out HTuple column, out HTuple phi, out HTuple length1, out HTuple length2)
void HXLD.SmallestRectangle2Xld(out HTuple row, out HTuple column, out HTuple phi, out HTuple length1, out HTuple length2)
void HXLD.SmallestRectangle2Xld(out double row, out double column, out double phi, out double length1, out double length2)
Description
The operator smallest_rectangle2_xldsmallest_rectangle2_xldSmallestRectangle2XldSmallestRectangle2XldSmallestRectangle2Xld determines the smallest
enclosing rectangle of each input contour or polygon, i.e., the rectangle
with the smallest area of all rectangles containing the contour. For this
rectangle the center, the inclination, and the two radii are calculated.
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
XLDXLDXLDXLDXLD. In case of an empty contour all parameters
have the value 0.0 if no other behavior was set (see set_systemset_systemSetSystemSetSystemSetSystem).
Execution Information
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Automatically parallelized on tuple level.
Parameters
XLDXLDXLDXLDXLD (input_object) xld(-array) → objectHXLDHXLDHobject
Contours or polygons to be examined.
RowRowRowRowrow (output_control) rectangle2.center.y(-array) → HTupleHTupleHtuple (real) (double) (double) (double)
Row coordinate of the center point of the enclosing
rectangle.
ColumnColumnColumnColumncolumn (output_control) rectangle2.center.x(-array) → HTupleHTupleHtuple (real) (double) (double) (double)
Column coordinate of the center point of the
enclosing rectangle.
PhiPhiPhiPhiphi (output_control) rectangle2.angle.rad(-array) → HTupleHTupleHtuple (real) (double) (double) (double)
Orientation of the enclosing rectangle
(arc measure)
Assertion: - pi / 2 < Phi && Phi <= pi / 2
Length1Length1Length1Length1length1 (output_control) rectangle2.hwidth(-array) → HTupleHTupleHtuple (real) (double) (double) (double)
First radius (half length) of the enclosing
rectangle.
Assertion: Length1 >= 0.0
Length2Length2Length2Length2length2 (output_control) rectangle2.hheight(-array) → HTupleHTupleHtuple (real) (double) (double) (double)
Second radius (half width) of the enclosing
rectangle.
Assertion: Length2 >= 0.0 && Length2 <= Length1
Complexity
If N is the number of contour points and C is the number of points
in the convex hull, the runtime complexity is O(N*ln(N)+C^2).
Result
smallest_rectangle2_xldsmallest_rectangle2_xldSmallestRectangle2XldSmallestRectangle2XldSmallestRectangle2Xld 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>). If
necessary, an exception is raised.
Possible Predecessors
gen_contours_skeleton_xldgen_contours_skeleton_xldGenContoursSkeletonXldGenContoursSkeletonXldGenContoursSkeletonXld,
edges_sub_pixedges_sub_pixEdgesSubPixEdgesSubPixEdgesSubPix,
threshold_sub_pixthreshold_sub_pixThresholdSubPixThresholdSubPixThresholdSubPix,
gen_contour_polygon_xldgen_contour_polygon_xldGenContourPolygonXldGenContourPolygonXldGenContourPolygonXld
Possible Successors
gen_polygons_xldgen_polygons_xldGenPolygonsXldGenPolygonsXldGenPolygonsXld
Alternatives
smallest_rectangle1smallest_rectangle1SmallestRectangle1SmallestRectangle1SmallestRectangle1,
shape_trans_xldshape_trans_xldShapeTransXldShapeTransXldShapeTransXld
See also
smallest_rectangle1smallest_rectangle1SmallestRectangle1SmallestRectangle1SmallestRectangle1,
smallest_circlesmallest_circleSmallestCircleSmallestCircleSmallestCircle,
elliptic_axis_xldelliptic_axis_xldEllipticAxisXldEllipticAxisXldEllipticAxisXld
Module
Foundation