polar_trans_contour_xldpolar_trans_contour_xldPolarTransContourXldPolarTransContourXldpolar_trans_contour_xld (算子)

名称

polar_trans_contour_xldpolar_trans_contour_xldPolarTransContourXldPolarTransContourXldpolar_trans_contour_xld — 将环形弧中的轮廓变换为极坐标。

签名

描述

polar_trans_contour_xldpolar_trans_contour_xldPolarTransContourXldPolarTransContourXldPolarTransContourXldpolar_trans_contour_xld transforms the ContourContourContourContourcontourcontour in the annular arc specified by the center point (RowRowRowRowrowrow, ColumnColumnColumnColumncolumncolumn), the radii RadiusStartRadiusStartRadiusStartRadiusStartradiusStartradius_start and RadiusEndRadiusEndRadiusEndRadiusEndradiusEndradius_end and the angles AngleStartAngleStartAngleStartAngleStartangleStartangle_start and AngleEndAngleEndAngleEndAngleEndangleEndangle_end to its polar coordinate version PolarTransContourPolarTransContourPolarTransContourPolarTransContourpolarTransContourpolar_trans_contour in the virtual image of the dimensions WidthWidthWidthWidthwidthwidth x HeightHeightHeightHeightheightheight. 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 RadiusStartRadiusStartRadiusStartRadiusStartradiusStartradius_start and AngleStartAngleStartAngleStartAngleStartangleStartangle_start. Analogously, the coordinate (HeightHeightHeightHeightheightheight-1,WidthWidthWidthWidthwidthwidth-1) in the output contour always corresponds to the point in the contour that is specified by RadiusEndRadiusEndRadiusEndRadiusEndradiusEndradius_end and AngleEndAngleEndAngleEndAngleEndangleEndangle_end, even if the contour does not contain these points. In the usual mode (AngleStartAngleStartAngleStartAngleStartangleStartangle_start < AngleEndAngleEndAngleEndAngleEndangleEndangle_end and RadiusStartRadiusStartRadiusStartRadiusStartradiusStartradius_start < RadiusEndRadiusEndRadiusEndRadiusEndradiusEndradius_end), 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., AngleStartAngleStartAngleStartAngleStartangleStartangle_start > AngleEndAngleEndAngleEndAngleEndangleEndangle_end or RadiusStartRadiusStartRadiusStartRadiusStartradiusStartradius_start > RadiusEndRadiusEndRadiusEndRadiusEndradiusEndradius_end), any desired orientation of the output contour PolarTransContourPolarTransContourPolarTransContourPolarTransContourpolarTransContourpolar_trans_contour can be achieved.

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

Note that PolarTransContourPolarTransContourPolarTransContourPolarTransContourpolarTransContourpolar_trans_contour can consist of more than one contour because ContourContourContourContourcontourcontour may be split at AngleStartAngleStartAngleStartAngleStartangleStartangle_start respectively AngleEndAngleEndAngleEndAngleEndangleEndangle_end or the size of the angle interval [AngleStartAngleStartAngleStartAngleStartangleStartangle_start,AngleEndAngleEndAngleEndAngleEndangleEndangle_end] may be greater than one 2pi period.

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

更多信息

有关 HALCON 中使用的不同二维坐标系的说明，请参阅 变换 / 二维变换 一章的引言。

注意

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

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

另见

polar_trans_image_extpolar_trans_image_extPolarTransImageExtPolarTransImageExtPolarTransImageExtpolar_trans_image_ext, polar_trans_image_invpolar_trans_image_invPolarTransImageInvPolarTransImageInvPolarTransImageInvpolar_trans_image_inv, polar_trans_regionpolar_trans_regionPolarTransRegionPolarTransRegionPolarTransRegionpolar_trans_region, polar_trans_region_invpolar_trans_region_invPolarTransRegionInvPolarTransRegionInvPolarTransRegionInvpolar_trans_region_inv, polar_trans_contour_xld_invpolar_trans_contour_xld_invPolarTransContourXldInvPolarTransContourXldInvPolarTransContourXldInvpolar_trans_contour_xld_inv

模块

基础

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