Operator Reference

HALCON Operator Reference / Regions / Features

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moments_region_2nd_rel_invarmoments_region_2nd_rel_invarMomentsRegion2ndRelInvarMomentsRegion2ndRelInvarmoments_region_2nd_rel_invar (Operator)

moments_region_2nd_rel_invarmoments_region_2nd_rel_invarMomentsRegion2ndRelInvarMomentsRegion2ndRelInvarmoments_region_2nd_rel_invar — Geometric moments of regions.

Signature

moments_region_2nd_rel_invar(Regions : : : PHI1, PHI2)

Herror moments_region_2nd_rel_invar(const Hobject Regions, double* PHI1, double* PHI2)

Herror T_moments_region_2nd_rel_invar(const Hobject Regions, Htuple* PHI1, Htuple* PHI2)

void MomentsRegion2ndRelInvar(const HObject& Regions, HTuple* PHI1, HTuple* PHI2)

HTuple HRegion::MomentsRegion2ndRelInvar(HTuple* PHI2) const

double HRegion::MomentsRegion2ndRelInvar(double* PHI2) const

static void HOperatorSet.MomentsRegion2ndRelInvar(HObject regions, out HTuple PHI1, out HTuple PHI2)

HTuple HRegion.MomentsRegion2ndRelInvar(out HTuple PHI2)

double HRegion.MomentsRegion2ndRelInvar(out double PHI2)

def moments_region_2nd_rel_invar(regions: HObject) -> Tuple[Sequence[float], Sequence[float]]

def moments_region_2nd_rel_invar_s(regions: HObject) -> Tuple[float, float]

Description

The operator moments_region_2nd_rel_invarmoments_region_2nd_rel_invarMomentsRegion2ndRelInvarMomentsRegion2ndRelInvarmoments_region_2nd_rel_invar calculates the scaled relative moments (PHI1PHI1PHI1PHI1phi1, PHI2PHI2PHI2PHI2phi2).

Calculation:

The moments PHI1 and PHI2 are defined by:

If more than one region is passed the results are stored in tuples, the index of a value in the tuple corresponding to the index of a region in the input.

In case of empty region all parameters have the value 0.0 if no other behavior was set (see set_systemset_systemSetSystemSetSystemset_system).

Execution Information

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Automatically parallelized on tuple level.

Parameters

RegionsRegionsRegionsregionsregions (input_object)  region(-array) → objectHRegionHObjectHObjectHobject

Regions to be examined.

PHI1PHI1PHI1PHI1phi1 (output_control)  real(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)

Moment of 2nd order.

PHI2PHI2PHI2PHI2phi2 (output_control)  real(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)

Moment of 2nd order.

Result

The operator moments_region_2nd_rel_invarmoments_region_2nd_rel_invarMomentsRegion2ndRelInvarMomentsRegion2ndRelInvarmoments_region_2nd_rel_invar returns the value 2 ( H_MSG_TRUE) if the input is not empty. 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>)set_system("no_object_result",<Result>). The behavior in case of empty region (the region is the empty set) is set via set_system('empty_region_result',<Result>)set_system("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)set_system("empty_region_result",<Result>). If necessary an exception is raised.

Possible Predecessors

thresholdthresholdThresholdThresholdthreshold, regiongrowingregiongrowingRegiongrowingRegiongrowingregiongrowing, connectionconnectionConnectionConnectionconnection

Alternatives

moments_region_2ndmoments_region_2ndMomentsRegion2ndMomentsRegion2ndmoments_region_2nd

See also

elliptic_axiselliptic_axisEllipticAxisEllipticAxiselliptic_axis

Module

Foundation

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ClassesClasses | | Operators