get_region_contourT_get_region_contourGetRegionContourGetRegionContour (Operator)


get_region_contourT_get_region_contourGetRegionContourGetRegionContour — Access the contour of an object.


get_region_contour(Region : : : Rows, Columns)

Herror T_get_region_contour(const Hobject Region, Htuple* Rows, Htuple* Columns)

void GetRegionContour(const HObject& Region, HTuple* Rows, HTuple* Columns)

void HRegion::GetRegionContour(HTuple* Rows, HTuple* Columns) const

static void HOperatorSet.GetRegionContour(HObject region, out HTuple rows, out HTuple columns)

void HRegion.GetRegionContour(out HTuple rows, out HTuple columns)


The operator get_region_contourget_region_contourGetRegionContourGetRegionContourGetRegionContour returns the contour of a region. A contour is a result of line (RowsRowsRowsRowsrows) and column coordinates (ColumnsColumnsColumnsColumnscolumns), describing the boundary of the region. The contour lies on the region. It starts at the smallest line number. In that line at the pixel with the largest column index. The rotation direction is clockwise. The first pixel of the contour is identical with the last. Holes of the region are ignored. The operator get_region_contourget_region_contourGetRegionContourGetRegionContourGetRegionContour returns the coordinates in the form of tuples. An empty region is passed as empty tuple.


Holes of the region are ignored. Only one region may be passed, and this region must have exactly one connection component.

Execution Information


RegionRegionRegionRegionregion (input_object)  region objectHRegionHRegionHobject

Output region.

RowsRowsRowsRowsrows (output_control)  contour.y-array HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Line numbers of the contour pixels.

ColumnsColumnsColumnsColumnscolumns (output_control)  contour.x-array HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Column numbers of the contour pixels.

Number of elements: Columns == Rows


The operator get_region_contourget_region_contourGetRegionContourGetRegionContourGetRegionContour normally returns the value 2 (H_MSG_TRUE). If more than one connection component is passed an exception is raised. The behavior in case of empty input (no input regions available) is set via the operator 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>).

Possible Predecessors

sobel_ampsobel_ampSobelAmpSobelAmpSobelAmp, thresholdthresholdThresholdThresholdThreshold, skeletonskeletonSkeletonSkeletonSkeleton, edges_imageedges_imageEdgesImageEdgesImageEdgesImage, gen_rectangle1gen_rectangle1GenRectangle1GenRectangle1GenRectangle1, gen_circlegen_circleGenCircleGenCircleGenCircle

See also

copy_objcopy_objCopyObjCopyObjCopyObj, get_region_polygonget_region_polygonGetRegionPolygonGetRegionPolygonGetRegionPolygon