Developer Reference

  • 2020
  • 10/21/2020
  • Public Content
Contents

GetHuMoments

Retrieves image Hu moment invariants computed by
ippiMoments
function.

Syntax

IppStatus ippiGetHuMoments_64f(const IppiMomentState_64f*
pState
, int
nChannel
, IppiHuMoment_64f
pHm
);
Include Files
ippi.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
,
ipps.h
Libraries:
ippcore.lib
,
ippvm.lib
,
ipps.lib
Parameters
pState
Pointer to the structure that stores image moments.
nChannel
The channel for which the moment is returned.
pHm
Pointer to the array containing the Hu moment invariants.
Description
This function returns the pointer
pHm
to the array of seven Hu moment invariants previously computed by the ippiMoments function.
Return Values
ippStsNoErr
Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtrErr
Indicates an error condition if
pState
or
pHm
pointer is
NULL
.
ippStsContextMatchErr
Indicates an error condition if a pointer to an invalid structure is passed.
ippStsMoment00ZeroErr
Indicates an error condition if
M
(
0,0
) value is close to zero.

Example



    
/******************************************************************************* * Copyright 2015-2020 Intel Corporation. * * This software and the related documents are Intel copyrighted materials, and * your use of them is governed by the express license under which they were * provided to you (License). Unless the License provides otherwise, you may not * use, modify, copy, publish, distribute, disclose or transmit this software or * the related documents without Intel's prior written permission. * * This software and the related documents are provided as is, with no express * or implied warranties, other than those that are expressly stated in the * License. *******************************************************************************/ // A simple example of computing Hu moment values for images. // implemented with Intel(R) Integrated Primitives (Intel(R) IPP) functions: // ippiSet_8u_C1R // ippiMomentGetStateSize_64f // ippiMomentInit_64f // ippiMoments64f_8u_C1R // ippiGetHuMoments_64f #include <stdio.h> #include "ipp.h" /* Next two defines are created to simplify code reading and understanding */ #define EXIT_MAIN exitLine: /* Label for Exit */ #define check_sts(st) if((st) != ippStsNoErr) goto exitLine; /* Go to Exit if Intel(R) IPP function returned status different from ippStsNoErr */ /* Results of ippMalloc() are not validated because Intel(R) IPP functions perform bad arguments check and will return an appropriate status */ int main(void) { IppStatus status = ippStsNoErr; Ipp8u pSrc[64]; /* Pointer to source image */ IppiSize roiA={8,8}, roiH={8,1}, roiV={1,8}; /* Used image ROI sizes */ int sizeState = 0; /* State size */ IppiHuMoment_64f hmH = {0}, hmV= {0}; /* Horizontal and vertical moments */ IppiMomentState_64f *pState = NULL; /* Pointers to state structure */ check_sts( status = ippiMomentGetStateSize_64f(ippAlgHintNone, &sizeState) ) /* memory allocation */ pState = (IppiMomentState_64f*) ippMalloc( sizeState ); check_sts( status = ippiMomentInit_64f(pState, ippAlgHintNone) ) /* set horizontal edge */ check_sts( status = ippiSet_8u_C1R( 0, pSrc, 8, roiA ) ) check_sts( status = ippiSet_8u_C1R( 3, pSrc, 8, roiH ) ) /* compute spatial moment values */ check_sts( status = ippiMoments64f_8u_C1R( pSrc, 8, roiA, pState ) ) /* compute seven Hu moment invariants */ check_sts( status = ippiGetHuMoments_64f( pState, 0, hmH ) ) /* set vertical edge */ check_sts( status = ippiSet_8u_C1R( 0, pSrc, 8, roiA ) ) check_sts( status = ippiSet_8u_C1R( 3, pSrc, 8, roiV ) ) /* compute spatial moment values */ check_sts( status = ippiMoments64f_8u_C1R( pSrc, 8, roiA, pState ) ) /* compute seven Hu moment invariants */ check_sts( status = ippiGetHuMoments_64f( pState, 0, hmV ) ) EXIT_MAIN ippFree( pState ); printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status)); return (int)status; }

Product and Performance Information

1

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Notice revision #20110804