Moments

Syntax

Parameters

pSrc	Pointer to the source image ROI.
srcStep	Distance in bytes between starts of consecutive lines in the source image.
roiSize	Size of the source ROI in pixels.
pState	Pointer to the structure that stores image moments.

Description

The function ippiMoments is declared in the ippi.h file. It operates with ROI (see Regions of Interest in Intel IPP). This function computes all spatial and central moments of order 0 to 3 for the source image pSrc. The seven Hu moment invariants are also computed. Different functions, ippiMoments64s and ippiMoments64f, are used to compute image moments in integer and floating-point formats, respectively.

The ippiMoments function computes spatial moment values relative to the image point referred to by pSrc. Note that this point is the ROI origin and may not coincide with the entire image origin. If you need to obtain spatial moment values relative to the actual image origin, use ippiGetSpatialMoment functions to recalculate them.

The moments' values are stored in the pState structure. To retrieve a particular moment value, use one of the functions described in the sections that follow.

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtrErr	Indicates an error condition if pSrc or pState pointer is NULL.
ippStsSizeErr	Indicates an error condition if roiSize has a field with zero or negative value.
ippStsStepErr	Indicates an error condition if srcStep has a zero or negative value.
ippStsContextMatchErr	Indicates an error condition if a pointer to an invalid structure is passed.