Intel® Integrated Performance Primitives Developer Guide and Reference

ID 790148
Date 11/07/2023
Public

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Document Table of Contents

Moments

Computes all image moments of order 0 to 3 and Hu moment invariants.

Syntax

Case 1: Computation of floating-point results

IppStatus ippiMoments64f_<mod>(const Ipp<datatype>* pSrc, int srcStep, IppiSize roiSize, IppiMomentState_64f* pCtx);

Supported values for mod:

8u_C1R

16u_C1R

32f_C1R

8u_C3R

16u_C3R

32f_C3R

8u_AC4R

16u_AC4R

32f_AC4R

Include Files

ippi.h

Domain Dependencies

Headers: ippcore.h, ippvm.h, ipps.h

Libraries: ippcore.lib, ippvm.lib, ipps.lib

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.

pCtx

Pointer to the structure that stores image moments.

Description

This function 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 pCtx 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 pCtxpointer 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.