line_positionline_positionLinePositionLinePosition (Operator)

Name

line_positionline_positionLinePositionLinePosition — Calculate the center of gravity, length, and orientation of a line.

Signature

line_position( : : RowBegin, ColBegin, RowEnd, ColEnd : RowCenter, ColCenter, Length, Phi)

Herror line_position(double RowBegin, double ColBegin, double RowEnd, double ColEnd, double* RowCenter, double* ColCenter, double* Length, double* Phi)

Herror T_line_position(const Htuple RowBegin, const Htuple ColBegin, const Htuple RowEnd, const Htuple ColEnd, Htuple* RowCenter, Htuple* ColCenter, Htuple* Length, Htuple* Phi)

void LinePosition(const HTuple& RowBegin, const HTuple& ColBegin, const HTuple& RowEnd, const HTuple& ColEnd, HTuple* RowCenter, HTuple* ColCenter, HTuple* Length, HTuple* Phi)

static void HMisc::LinePosition(const HTuple& RowBegin, const HTuple& ColBegin, const HTuple& RowEnd, const HTuple& ColEnd, HTuple* RowCenter, HTuple* ColCenter, HTuple* Length, HTuple* Phi)

static void HMisc::LinePosition(double RowBegin, double ColBegin, double RowEnd, double ColEnd, double* RowCenter, double* ColCenter, double* Length, double* Phi)

static void HOperatorSet.LinePosition(HTuple rowBegin, HTuple colBegin, HTuple rowEnd, HTuple colEnd, out HTuple rowCenter, out HTuple colCenter, out HTuple length, out HTuple phi)

static void HMisc.LinePosition(HTuple rowBegin, HTuple colBegin, HTuple rowEnd, HTuple colEnd, out HTuple rowCenter, out HTuple colCenter, out HTuple length, out HTuple phi)

static void HMisc.LinePosition(double rowBegin, double colBegin, double rowEnd, double colEnd, out double rowCenter, out double colCenter, out double length, out double phi)

Description

The operator line_positionline_positionLinePositionLinePositionLinePosition returns the center (RowCenterRowCenterRowCenterRowCenterrowCenter, ColCenterColCenterColCenterColCentercolCenter), the (Euclidean) length (LengthLengthLengthLengthlength) and the orientation (-pi/2 < PhiPhiPhiPhiphi <= pi/2) of the given lines. If more than one line is to be treated the line and column indices can be passed as tuples. In this case the output parameters, of course, are also tuples.

The routine is applied, for example, to model lines in order to determine search regions for the edge detection (detect_edge_segmentsdetect_edge_segmentsDetectEdgeSegmentsDetectEdgeSegmentsDetectEdgeSegments).

Execution Information

Parameters

RowBeginRowBeginRowBeginRowBeginrowBegin (input_control)  line.begin.y(-array) HTupleHTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)

Row coordinates of the starting points of the input lines.

ColBeginColBeginColBeginColBegincolBegin (input_control)  line.begin.x(-array) HTupleHTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)

Column coordinates of the starting points of the input lines.

RowEndRowEndRowEndRowEndrowEnd (input_control)  line.end.y(-array) HTupleHTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)

Row coordinates of the ending points of the input lines.

ColEndColEndColEndColEndcolEnd (input_control)  line.end.x(-array) HTupleHTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)

Column coordinates of the ending points of the input lines.

RowCenterRowCenterRowCenterRowCenterrowCenter (output_control)  point.y(-array) HTupleHTupleHtuple (real) (double) (double) (double)

Row coordinates of the centers of gravity of the input lines.

ColCenterColCenterColCenterColCentercolCenter (output_control)  point.x(-array) HTupleHTupleHtuple (real) (double) (double) (double)

Column coordinates of the centers of gravity of the input lines.

LengthLengthLengthLengthlength (output_control)  real(-array) HTupleHTupleHtuple (real) (double) (double) (double)

Euclidean length of the input lines.

PhiPhiPhiPhiphi (output_control)  angle.rad(-array) HTupleHTupleHtuple (real) (double) (double) (double)

Orientation of the input lines.

Result

line_positionline_positionLinePositionLinePositionLinePosition always returns the value 2 (H_MSG_TRUE).

Possible Predecessors

sobel_ampsobel_ampSobelAmpSobelAmpSobelAmp, edges_imageedges_imageEdgesImageEdgesImageEdgesImage, thresholdthresholdThresholdThresholdThreshold, hysteresis_thresholdhysteresis_thresholdHysteresisThresholdHysteresisThresholdHysteresisThreshold, split_skeleton_regionsplit_skeleton_regionSplitSkeletonRegionSplitSkeletonRegionSplitSkeletonRegion, split_skeleton_linessplit_skeleton_linesSplitSkeletonLinesSplitSkeletonLinesSplitSkeletonLines

Possible Successors

set_line_widthset_line_widthSetLineWidthSetLineWidthSetLineWidth, disp_linedisp_lineDispLineDispLineDispLine

Alternatives

line_orientationline_orientationLineOrientationLineOrientationLineOrientation

See also

line_orientationline_orientationLineOrientationLineOrientationLineOrientation, detect_edge_segmentsdetect_edge_segmentsDetectEdgeSegmentsDetectEdgeSegmentsDetectEdgeSegments

Module

Foundation