Name
moments_region_2nd_invar moments_region_2nd_invar MomentsRegion2ndInvar moments_region_2nd_invar MomentsRegion2ndInvar MomentsRegion2ndInvar — Geometric moments of regions.
Herror moments_region_2nd_invar (const Hobject Regions , double* M11 , double* M20 , double* M02 )
Herror T_moments_region_2nd_invar (const Hobject Regions , Htuple* M11 , Htuple* M20 , Htuple* M02 )
Herror moments_region_2nd_invar (Hobject Regions , double* M11 , double* M20 , double* M02 )
Herror moments_region_2nd_invar (Hobject Regions , HTuple* M11 , HTuple* M20 , HTuple* M02 )
double HRegion ::MomentsRegion2ndInvar (double* M20 , double* M02 ) const
HTuple HRegionArray ::MomentsRegion2ndInvar (HTuple* M20 , HTuple* M02 ) const
The operator moments_region_2nd_invar moments_region_2nd_invar MomentsRegion2ndInvar moments_region_2nd_invar MomentsRegion2ndInvar MomentsRegion2ndInvar calculates the
scaled moments (M20 M20 M20 M20 M20 m20 , M02 M02 M02 M02 M02 m02 )
and the procut of inertia of the axes through the center parallel to the
coordinate axes (M11 M11 M11 M11 M11 m11 ).
Calculation:
and
are the coordinates
of the center of a region R with the area F.
Then the moments
are defined by:
,
wherein Z and S run through all pixels of the region
R.
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_system set_system SetSystem set_system SetSystem SetSystem ).
Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: global (may be called from any thread).
Automatically parallelized on tuple level.
Product of inertia of the axes through the center
parallel to the coordinate axes.
Moment of 2nd order (line-dependent).
Moment of 2nd order (column-dependent).
If F is the area of the region the mean runtime
complexity is O(sqrt(F)).
The operator moments_region_2nd_invar moments_region_2nd_invar MomentsRegion2ndInvar moments_region_2nd_invar MomentsRegion2ndInvar MomentsRegion2ndInvar 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>) set_system("no_object_result",<Result>) SetSystem("no_object_result",<Result>) SetSystem("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>) set_system("empty_region_result",<Result>) SetSystem("empty_region_result",<Result>) SetSystem("empty_region_result",<Result>) .
If necessary an exception is raised.
threshold threshold Threshold threshold Threshold Threshold ,
regiongrowing regiongrowing Regiongrowing regiongrowing Regiongrowing Regiongrowing ,
connection connection Connection connection Connection Connection
moments_region_2nd moments_region_2nd MomentsRegion2nd moments_region_2nd MomentsRegion2nd MomentsRegion2nd
elliptic_axis elliptic_axis EllipticAxis elliptic_axis EllipticAxis EllipticAxis
Foundation