polar_trans_image_invpolar_trans_image_invPolarTransImageInvPolarTransImageInv (Operator)
Name
polar_trans_image_invpolar_trans_image_invPolarTransImageInvPolarTransImageInv — Transform an image in polar coordinates back to cartesian coordinates
Signature
Herror polar_trans_image_inv(const Hobject PolarImage, Hobject* XYTransImage, double Row, double Column, double AngleStart, double AngleEnd, double RadiusStart, double RadiusEnd, const Hlong Width, const Hlong Height, const char* Interpolation)
Herror T_polar_trans_image_inv(const Hobject PolarImage, Hobject* XYTransImage, const Htuple Row, const Htuple Column, const Htuple AngleStart, const Htuple AngleEnd, const Htuple RadiusStart, const Htuple RadiusEnd, const Htuple Width, const Htuple Height, const Htuple Interpolation)
void PolarTransImageInv(const HObject& PolarImage, HObject* XYTransImage, const HTuple& Row, const HTuple& Column, const HTuple& AngleStart, const HTuple& AngleEnd, const HTuple& RadiusStart, const HTuple& RadiusEnd, const HTuple& Width, const HTuple& Height, const HTuple& Interpolation)
HImage HImage::PolarTransImageInv(const HTuple& Row, const HTuple& Column, double AngleStart, double AngleEnd, const HTuple& RadiusStart, const HTuple& RadiusEnd, Hlong Width, Hlong Height, const HString& Interpolation) const
HImage HImage::PolarTransImageInv(double Row, double Column, double AngleStart, double AngleEnd, double RadiusStart, double RadiusEnd, Hlong Width, Hlong Height, const HString& Interpolation) const
HImage HImage::PolarTransImageInv(double Row, double Column, double AngleStart, double AngleEnd, double RadiusStart, double RadiusEnd, Hlong Width, Hlong Height, const char* Interpolation) const
HImage HImage::PolarTransImageInv(double Row, double Column, double AngleStart, double AngleEnd, double RadiusStart, double RadiusEnd, Hlong Width, Hlong Height, const wchar_t* Interpolation) const
(Windows only)
static void HOperatorSet.PolarTransImageInv(HObject polarImage, out HObject XYTransImage, HTuple row, HTuple column, HTuple angleStart, HTuple angleEnd, HTuple radiusStart, HTuple radiusEnd, HTuple width, HTuple height, HTuple interpolation)
HImage HImage.PolarTransImageInv(HTuple row, HTuple column, double angleStart, double angleEnd, HTuple radiusStart, HTuple radiusEnd, int width, int height, string interpolation)
HImage HImage.PolarTransImageInv(double row, double column, double angleStart, double angleEnd, double radiusStart, double radiusEnd, int width, int height, string interpolation)
Description
polar_trans_image_invpolar_trans_image_invPolarTransImageInvPolarTransImageInvPolarTransImageInv transforms the polar coordinate
representation of an image, stored in PolarImagePolarImagePolarImagePolarImagepolarImage, back onto
an annular arc in cartesian coordinates, described by the radii
RadiusStartRadiusStartRadiusStartRadiusStartradiusStart and RadiusEndRadiusEndRadiusEndRadiusEndradiusEnd and the angles
AngleStartAngleStartAngleStartAngleStartangleStart and AngleEndAngleEndAngleEndAngleEndangleEnd with the center point
located at (RowRowRowRowrow, ColumnColumnColumnColumncolumn). All of these values can
be chosen as real numbers. The overall size of the target image
will be WidthWidthWidthWidthwidth x HeightHeightHeightHeightheight pixels.
The parameter InterpolationInterpolationInterpolationInterpolationinterpolation is used to select the
interpolation method 'bilinear'"bilinear""bilinear""bilinear""bilinear" or
'nearest_neighbor'"nearest_neighbor""nearest_neighbor""nearest_neighbor""nearest_neighbor". With 'nearest_neighbor'"nearest_neighbor""nearest_neighbor""nearest_neighbor""nearest_neighbor", the
gray value of a pixel in the output image is determined by the gray
value of the closest pixel in the input image. With
'bilinear'"bilinear""bilinear""bilinear""bilinear", the gray value of a pixel in the output image
is determined by bilinear interpolation of the gray values of the
four closest pixels in the input image. The mode
'bilinear'"bilinear""bilinear""bilinear""bilinear" results in images of better quality, but is
slower than the mode 'nearest_neighbor'"nearest_neighbor""nearest_neighbor""nearest_neighbor""nearest_neighbor".
The angles and radii are inclusive, which means that the first row
of the input image will be mapped onto a circle with a distance of
RadiusStartRadiusStartRadiusStartRadiusStartradiusStart pixels from the specified center and the last
row will be mapped onto a circle of radius RadiusEndRadiusEndRadiusEndRadiusEndradiusEnd.
polar_trans_image_invpolar_trans_image_invPolarTransImageInvPolarTransImageInvPolarTransImageInv is the inverse function of
polar_trans_image_extpolar_trans_image_extPolarTransImageExtPolarTransImageExtPolarTransImageExt.
The call sequence:
polar_trans_image_ext(Image, PolarImage, Row, Column, rad(360), 0, 0,
Radius, Width, Height, Interpolation)
polar_trans_image_inv(PolarImage, XYTransImage, Row, Column, rad(360), 0, 0,
Radius, Width, Height, Interpolation)
returns the image 'Image'"Image""Image""Image""Image", restricted to the
circle around (RowRowRowRowrow, ColumnColumnColumnColumncolumn) with radius
'Radius'"Radius""Radius""Radius""Radius", as its output image
XYTransImageXYTransImageXYTransImageXYTransImageXYTransImage.
polar_trans_image_invpolar_trans_image_invPolarTransImageInvPolarTransImageInvPolarTransImageInv can be executed on an OpenCL device. There can
be slight differences in the output compared to the execution on the CPU.
Additionally, for images of type 'byte'"byte""byte""byte""byte", 'int2'"int2""int2""int2""int2" or
'uint2'"uint2""uint2""uint2""uint2" the system parameter 'int_zooming'"int_zooming""int_zooming""int_zooming""int_zooming" selects between
fast calculation in fixed point arithmetics
('int_zooming'"int_zooming""int_zooming""int_zooming""int_zooming" = 'true'"true""true""true""true")
and highly accurate calculation in floating point arithmetics
('int_zooming'"int_zooming""int_zooming""int_zooming""int_zooming" = 'false'"false""false""false""false"). Fixed point calculation
can lead to minor gray value deviations. In this case, the
domain of resulting images can differ as well.
Further Information
For an explanation of the different 2D coordinate systems
used in HALCON, see the introduction of chapter
Transformations / 2D Transformations.
Execution Information
- Supports OpenCL compute devices.
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Automatically parallelized on tuple level.
- Automatically parallelized on channel level.
- Automatically parallelized on internal data level.
Parameters
PolarImagePolarImagePolarImagePolarImagepolarImage (input_object) (multichannel-)image(-array) → objectHImageHImageHobject (byte* / int2* / uint2* / real*) *allowed for compute devices
Input image.
XYTransImageXYTransImageXYTransImageXYTransImageXYTransImage (output_object) (multichannel-)image(-array) → objectHImageHImageHobject * (byte / int2 / uint2 / real)
Output image.
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
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
AngleStartAngleStartAngleStartAngleStartangleStart (input_control) angle.rad → HTupleHTupleHtuple (real) (double) (double) (double)
Angle of the ray to map the first column of the
input image to.
Default value: 0.0
Suggested values: 0.0, 0.78539816, 1.57079632, 3.141592654, 6.2831853
AngleEndAngleEndAngleEndAngleEndangleEnd (input_control) angle.rad → HTupleHTupleHtuple (real) (double) (double) (double)
Angle of the ray to map the last column of the
input image to.
Default value: 6.2831853
Suggested values: 0.0, 0.78539816, 1.57079632, 3.141592654, 6.2831853
RadiusStartRadiusStartRadiusStartRadiusStartradiusStart (input_control) number → HTupleHTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)
Radius of the circle to map the first row of
the input image to.
Default value: 0
Suggested values: 0, 16, 32, 64, 100, 128, 256, 512
Typical range of values: 0
≤
RadiusStart
RadiusStart
RadiusStart
RadiusStart
radiusStart
RadiusEndRadiusEndRadiusEndRadiusEndradiusEnd (input_control) number → HTupleHTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)
Radius of the circle to map the last row of the
input image to.
Default value: 100
Suggested values: 0, 16, 32, 64, 100, 128, 256, 512
Typical range of values: 0
≤
RadiusEnd
RadiusEnd
RadiusEnd
RadiusEnd
radiusEnd
WidthWidthWidthWidthwidth (input_control) extent.x → HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Width of the 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) extent.y → HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Height of the output image.
Default value: 512
Suggested values: 240, 256, 480, 512, 600, 1024
Typical range of values: 0
≤
Height
Height
Height
Height
height
≤
32767
InterpolationInterpolationInterpolationInterpolationinterpolation (input_control) string → HTupleHTupleHtuple (string) (string) (HString) (char*)
Interpolation method for the transformation.
Default value:
'nearest_neighbor'
"nearest_neighbor"
"nearest_neighbor"
"nearest_neighbor"
"nearest_neighbor"
List of values: 'bilinear'"bilinear""bilinear""bilinear""bilinear", 'nearest_neighbor'"nearest_neighbor""nearest_neighbor""nearest_neighbor""nearest_neighbor"
See also
polar_trans_image_extpolar_trans_image_extPolarTransImageExtPolarTransImageExtPolarTransImageExt,
polar_trans_regionpolar_trans_regionPolarTransRegionPolarTransRegionPolarTransRegion,
polar_trans_region_invpolar_trans_region_invPolarTransRegionInvPolarTransRegionInvPolarTransRegionInv,
polar_trans_contour_xldpolar_trans_contour_xldPolarTransContourXldPolarTransContourXldPolarTransContourXld,
polar_trans_contour_xld_invpolar_trans_contour_xld_invPolarTransContourXldInvPolarTransContourXldInvPolarTransContourXldInv
Module
Foundation