ImageMoments Class Reference

State object for calculating various image moments. More...

Public Member Functions
None	ImageMoments (self, cvb.ImagePlane image_plane, Optional[cvb.Rect] aoi, int preference)
	Calculate the moments on the input ImagePlane and area of interest.
float	central_moment (self, int x_order, int y_order, int normalization)
	Gets one of the central image moments.
cvb.foundation.HuMoments	hu_moments (self)
	Gets the seven Hu moments of the image.
float	spatial_moment (self, int x_order, int y_order, int normalization, Optional[cvb.Point2D] offset)
	Gets one of the spatial image moments.

Properties
	calculation_preference = property
	int: The preference of speed versus accuracy chosen, when this object was created (see cvb.foundation.MomentsCalculation).

Detailed Description

State object for calculating various image moments.

Constructor & Destructor Documentation

ImageMoments()

None ImageMoments	(		self,
		cvb.ImagePlane	image_plane,
		Optional[cvb.Rect]	aoi,
		int	preference )

Calculate the moments on the input ImagePlane and area of interest.

Parameters

image_plane : cvb.ImagePlane Plane on which to calculate the moments.

aoi : Optional[cvb.Rect] Area of interest to calculate the moments (default entire plane).

preference : int Speed or accuracy, MomentsCalculation.FavorNone by default.

Member Function Documentation

central_moment()

float central_moment	(		self,
		int	x_order,
		int	y_order,
		int	normalization )

Gets one of the central image moments.

Parameters

x_order : int X-order of the moment to retrieve (see cvb.foundation.MomentsOrder).

y_order : int Y-order of the moment to retrieve (see cvb.foundation.MomentsOrder).

normalization : int Whether or not to normalize (see cvb.foundation.MomentsNormalization).

Returns

float The central moment.

hu_moments()

cvb.foundation.HuMoments hu_moments

(

self

)

Gets the seven Hu moments of the image.

Returns

cvb.foundation.HuMoments Hu moments.

spatial_moment()

float spatial_moment	(		self,
		int	x_order,
		int	y_order,
		int	normalization,
		Optional[cvb.Point2D]	offset )

Gets one of the spatial image moments.

Parameters

x_order : int X-order of the moment to retrieve (see cvb.foundation.MomentsOrder).

y_order : int Y-order of the moment to retrieve (see cvb.foundation.MomentsOrder).

normalization : int Whether or not to normalize (see cvb.foundation.MomentsNormalization).

offset : Optional[cvb.Point2D] Offset of the moments (optional, by default uses the offset used when creating this object).

Returns

float The spatial moment.