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 ifpSrcorpCtxpointer isNULL.
- ippStsSizeErr
- Indicates an error condition ifroiSizehas a field with zero or negative value.
- ippStsStepErr
- Indicates an error condition ifsrcStephas a zero or negative value.
- ippStsContextMatchErr
- Indicates an error condition if a pointer to an invalid structure is passed.