get_region_runsT_get_region_runsGetRegionRunsGetRegionRuns (Operator)


get_region_runsT_get_region_runsGetRegionRunsGetRegionRuns — Access the runlength coding of a region.


get_region_runs(Region : : : Row, ColumnBegin, ColumnEnd)

Herror T_get_region_runs(const Hobject Region, Htuple* Row, Htuple* ColumnBegin, Htuple* ColumnEnd)

void GetRegionRuns(const HObject& Region, HTuple* Row, HTuple* ColumnBegin, HTuple* ColumnEnd)

void HRegion::GetRegionRuns(HTuple* Row, HTuple* ColumnBegin, HTuple* ColumnEnd) const

static void HOperatorSet.GetRegionRuns(HObject region, out HTuple row, out HTuple columnBegin, out HTuple columnEnd)

void HRegion.GetRegionRuns(out HTuple row, out HTuple columnBegin, out HTuple columnEnd)


The operator get_region_runsget_region_runsGetRegionRunsGetRegionRunsGetRegionRuns returns the region data in the form of chord tuples. The chord representation is caused by examining a region line by line with ascending line number (= from “top” to “bottom”). Every line is passed from left to right (ascending column number); storing all starting and ending points of region segments (= chords). Thus a region can be described by a sequence of chords, a chord being defined by line number, starting and ending points (column number). The operator get_region_runsget_region_runsGetRegionRunsGetRegionRunsGetRegionRuns returns the three components of the chords in the form of tuples. In case of an empty region three empty tuples are returned.


Only one region may be passed.

Execution Information


RegionRegionRegionRegionregion (input_object)  region objectHRegionHRegionHobject

Output region.

RowRowRowRowrow (output_control)  chord.y-array HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Line numbers of the chords.

ColumnBeginColumnBeginColumnBeginColumnBegincolumnBegin (output_control)  chord.x1-array HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Column numbers of the starting points of the chords.

Number of elements: ColumnBegin == Row

ColumnEndColumnEndColumnEndColumnEndcolumnEnd (output_control)  chord.x2-array HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Column numbers of the ending points of the chords.

Number of elements: ColumnEnd == Row


The operator get_region_runsget_region_runsGetRegionRunsGetRegionRunsGetRegionRuns normally returns the value 2 (H_MSG_TRUE). If more than one region 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

thresholdthresholdThresholdThresholdThreshold, connectionconnectionConnectionConnectionConnection



See also

copy_objcopy_objCopyObjCopyObjCopyObj, gen_region_runsgen_region_runsGenRegionRunsGenRegionRunsGenRegionRuns