HALCON 18.05 / HALCON Operator Reference / XLD / Geometric Transformations
ClassesClasses | | Operators

polar_trans_contour_xldpolar_trans_contour_xldPolarTransContourXldPolarTransContourXld (Operator)

Name

polar_trans_contour_xldpolar_trans_contour_xldPolarTransContourXldPolarTransContourXld — Transform a contour in an annular arc to polar coordinates.

Signature

polar_trans_contour_xld(Contour : PolarTransContour : Row, Column, AngleStart, AngleEnd, RadiusStart, RadiusEnd, Width, Height : )

Herror polar_trans_contour_xld(const Hobject Contour, Hobject* PolarTransContour, double Row, double Column, double AngleStart, double AngleEnd, double RadiusStart, double RadiusEnd, const Hlong Width, const Hlong Height)

Herror T_polar_trans_contour_xld(const Hobject Contour, Hobject* PolarTransContour, const Htuple Row, const Htuple Column, const Htuple AngleStart, const Htuple AngleEnd, const Htuple RadiusStart, const Htuple RadiusEnd, const Htuple Width, const Htuple Height)

void PolarTransContourXld(const HObject& Contour, HObject* PolarTransContour, const HTuple& Row, const HTuple& Column, const HTuple& AngleStart, const HTuple& AngleEnd, const HTuple& RadiusStart, const HTuple& RadiusEnd, const HTuple& Width, const HTuple& Height)

HXLDCont HXLDCont::PolarTransContourXld(const HTuple& Row, const HTuple& Column, double AngleStart, double AngleEnd, const HTuple& RadiusStart, const HTuple& RadiusEnd, Hlong Width, Hlong Height) const

HXLDCont HXLDCont::PolarTransContourXld(double Row, double Column, double AngleStart, double AngleEnd, double RadiusStart, double RadiusEnd, Hlong Width, Hlong Height) const

static void HOperatorSet.PolarTransContourXld(HObject contour, out HObject polarTransContour, HTuple row, HTuple column, HTuple angleStart, HTuple angleEnd, HTuple radiusStart, HTuple radiusEnd, HTuple width, HTuple height)

HXLDCont HXLDCont.PolarTransContourXld(HTuple row, HTuple column, double angleStart, double angleEnd, HTuple radiusStart, HTuple radiusEnd, int width, int height)

HXLDCont HXLDCont.PolarTransContourXld(double row, double column, double angleStart, double angleEnd, double radiusStart, double radiusEnd, int width, int height)

Description

polar_trans_contour_xldpolar_trans_contour_xldPolarTransContourXldPolarTransContourXldPolarTransContourXld transforms the ContourContourContourContourcontour in the annular arc specified by the center point (RowRowRowRowrow, ColumnColumnColumnColumncolumn), the radii RadiusStartRadiusStartRadiusStartRadiusStartradiusStart and RadiusEndRadiusEndRadiusEndRadiusEndradiusEnd and the angles AngleStartAngleStartAngleStartAngleStartangleStart and AngleEndAngleEndAngleEndAngleEndangleEnd to its polar coordinate version PolarTransContourPolarTransContourPolarTransContourPolarTransContourpolarTransContour in the virtual image of the dimensions WidthWidthWidthWidthwidth x HeightHeightHeightHeightheight. The output contour is cropped at the borders of this virtual image.

The coordinate (0,0) in the output contour always corresponds to the contour point specified by RadiusStartRadiusStartRadiusStartRadiusStartradiusStart and AngleStartAngleStartAngleStartAngleStartangleStart. Analogously, the coordinate (HeightHeightHeightHeightheight-1,WidthWidthWidthWidthwidth-1) in the output contour always corresponds to the point in the contour that is specified by RadiusEndRadiusEndRadiusEndRadiusEndradiusEnd and AngleEndAngleEndAngleEndAngleEndangleEnd, even if the contour does not contain these points. In the usual mode (AngleStartAngleStartAngleStartAngleStartangleStart < AngleEndAngleEndAngleEndAngleEndangleEnd and RadiusStartRadiusStartRadiusStartRadiusStartradiusStart < RadiusEndRadiusEndRadiusEndRadiusEndradiusEnd), the polar transformation is performed in the mathematically positive orientation (counterclockwise). Furthermore, contour points with smaller radii lie in the upper part of the output contour. By suitably exchanging the values of these parameters (e.g., AngleStartAngleStartAngleStartAngleStartangleStart > AngleEndAngleEndAngleEndAngleEndangleEnd or RadiusStartRadiusStartRadiusStartRadiusStartradiusStart > RadiusEndRadiusEndRadiusEndRadiusEndradiusEnd), any desired orientation of the output contour PolarTransContourPolarTransContourPolarTransContourPolarTransContourpolarTransContour can be achieved.

The angles can be chosen from all real numbers. Center point and radii can be real as well.

Note that PolarTransContourPolarTransContourPolarTransContourPolarTransContourpolarTransContour can consist of more than one contour because ContourContourContourContourcontour may be split at AngleStartAngleStartAngleStartAngleStartangleStart respectively AngleEndAngleEndAngleEndAngleEndangleEnd or the size of the angle interval [AngleStartAngleStartAngleStartAngleStartangleStart,AngleEndAngleEndAngleEndAngleEndangleEnd] may be greater than one 2pi period.

If more than one contour is passed in ContourContourContourContourcontour, their polar transformations are computed individually and stored as a tuple in PolarTransContourPolarTransContourPolarTransContourPolarTransContourpolarTransContour. However, since one contour may be transformed into several contours, there is no relation between the indices of the contours in the input tuple ContourContourContourContourcontour and the indices in the output tuple PolarTransContourPolarTransContourPolarTransContourPolarTransContourpolarTransContour.

Further Information

For an explanation of the different 2D coordinate systems used in HALCON, see the introduction of chapter Transformations / 2D Transformations.

Attention

Only the contour points are transformed. As the polar transformation is not affine, polar_trans_contour_xldpolar_trans_contour_xldPolarTransContourXldPolarTransContourXldPolarTransContourXld only produces reliable results if the spacing of the contour points is small. Existing attributes are not transformed.

Execution Information

Parameters

ContourContourContourContourcontour (input_object)  xld_cont(-array) → objectHXLDContHXLDContHobject

Input contour.

PolarTransContourPolarTransContourPolarTransContourPolarTransContourpolarTransContour (output_object)  xld_cont(-array) → objectHXLDContHXLDContHobject *

Output contour.

RowRowRowRowrow (input_control)  number → HTupleHTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)

Row coordinate of the center of the arc.

Default value: 256

Suggested values: 0, 16, 32, 64, 128, 240, 256, 480, 512

Typical range of values: 0 ≤ Row Row Row Row row ≤ 32767

Restriction: Row >= -131068 && Row <= 131068

ColumnColumnColumnColumncolumn (input_control)  number → HTupleHTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)

Column coordinate of the center of the arc.

Default value: 256

Suggested values: 0, 16, 32, 64, 128, 256, 320, 512, 640

Typical range of values: 0 ≤ Column Column Column Column column ≤ 32767

Restriction: Column >= -131068 && Column <= 131068

AngleStartAngleStartAngleStartAngleStartangleStart (input_control)  number → HTupleHTupleHtuple (real) (double) (double) (double)

Angle of the ray to be mapped to the column coordinate 0 of PolarTransContourPolarTransContourPolarTransContourPolarTransContourpolarTransContour.

Default value: 0.0

Suggested values: 0.0, 0.78539816, 1.57079632, 3.141592654, 6.2831853, 12.566370616

Typical range of values: -6.2831853 ≤ AngleStart AngleStart AngleStart AngleStart angleStart ≤ 6.2831853

AngleEndAngleEndAngleEndAngleEndangleEnd (input_control)  number → HTupleHTupleHtuple (real) (double) (double) (double)

Angle of the ray to be mapped to the column coordinate WidthWidthWidthWidthwidth-1 of PolarTransContourPolarTransContourPolarTransContourPolarTransContourpolarTransContour to.

Default value: 6.2831853

Suggested values: 0.0, 0.78539816, 1.57079632, 3.141592654, 6.2831853, 12.566370616

Typical range of values: -6.2831853 ≤ AngleEnd AngleEnd AngleEnd AngleEnd angleEnd ≤ 6.2831853

RadiusStartRadiusStartRadiusStartRadiusStartradiusStart (input_control)  number → HTupleHTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)

Radius of the circle to be mapped to the row coordinate 0 of PolarTransContourPolarTransContourPolarTransContourPolarTransContourpolarTransContour.

Default value: 0

Suggested values: 0, 16, 32, 64, 100, 128, 256, 512

Typical range of values: 0 ≤ RadiusStart RadiusStart RadiusStart RadiusStart radiusStart ≤ 32767

RadiusEndRadiusEndRadiusEndRadiusEndradiusEnd (input_control)  number → HTupleHTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)

Radius of the circle to be mapped to the row coordinate HeightHeightHeightHeightheight-1 of PolarTransContourPolarTransContourPolarTransContourPolarTransContourpolarTransContour.

Default value: 100

Suggested values: 0, 16, 32, 64, 100, 128, 256, 512

Typical range of values: 0 ≤ RadiusEnd RadiusEnd RadiusEnd RadiusEnd radiusEnd ≤ 32767

WidthWidthWidthWidthwidth (input_control)  number → HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Width of the virtual output image.

Default value: 512

Suggested values: 256, 320, 512, 640, 800, 1024

Typical range of values: 0 ≤ Width Width Width Width width ≤ 32767

HeightHeightHeightHeightheight (input_control)  number → HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Height of the virtual output image.

Default value: 512

Suggested values: 240, 256, 480, 512, 600, 1024

Typical range of values: 0 ≤ Height Height Height Height height ≤ 32767

See also

polar_trans_image_extpolar_trans_image_extPolarTransImageExtPolarTransImageExtPolarTransImageExt, polar_trans_image_invpolar_trans_image_invPolarTransImageInvPolarTransImageInvPolarTransImageInv, polar_trans_regionpolar_trans_regionPolarTransRegionPolarTransRegionPolarTransRegion, polar_trans_region_invpolar_trans_region_invPolarTransRegionInvPolarTransRegionInvPolarTransRegionInv, polar_trans_contour_xld_invpolar_trans_contour_xld_invPolarTransContourXldInvPolarTransContourXldInvPolarTransContourXldInv

Module

Foundation

ClassesClasses | | Operators
HALCON Operator Reference 18.05 Copyright © 1996-2018 MVTec Software GmbH