MorphReconstructDilate

Intel® Integrated Performance Primitives Developer Guide and Reference

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ID 790148

Date 11/07/2023

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MorphReconstructDilate

Reconstructs an image by dilation.

Syntax

IppStatus ippiMorphReconstructDilate_<mod>(const Ipp<datatype>* pSrc, int srcStep, Ipp<datatype>* pSrcDst, int srcDstStep, IppiSize roiSize, Ipp8u* pBuffer, IppiNorm norm);

Supported values for mod:

8u_C1IR

16u_C1IR

64f_C1IR

IppStatus ippiMorphReconstructDilate_32f_C1IR(const Ipp32f* pSrc, int srcStep, Ipp32f* pSrcDst, int srcDstStep, IppiSize roiSize, Ipp32f* pBuffer, IppiNorm norm);

Include Files

ippcv.h

Domain Dependencies

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

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

Parameters

pSrc

Pointer to the source image ROI.

srcStep

Distance in bytes between starts of consecutive lines in the source image.

pSrcDst

Pointer to the descreased and reconstructed image ROI.

srcDstStep

Distance in bytes between starts of consecutive lines in the decreased and reconstructed image.

roiSize

Size of the source and destination image ROI.

norm

Type of norm to form the mask for dilation; the following values are possible:

ippiNormInf	Infinity norm (8-connectivity, 3x3 rectangular mask).
ippiNormL1	L1 norm (4-connectivity, 3x3 cross mask).

pBuffer

Pointer to the buffer.

Description

This function operates with ROI (see Regions of Interest in Intel IPP).

This function performs morphological reconstruction of the decreased source image by dilation [Vincent93]. The operation is performed in the working buffer whose size should be computed using the function MorphReconstructGetBufferSize beforehand.

This operation enables detection of the regional maximums that can be used as markers for successive watershed segmentation.

Example below shows how the morphological reconstruction can be used to build markers of objects with different brightness. Some value (cap size) is subtracted from the initial image and then the subtracted image is reconstructed to the initial one. Thresholding and opening complete the building of markers. The figure below shows the results of these operations.

Building Markers for Segmentation by the Morphological Reconstruction

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtrErr	Indicates an error condition if one of the specified pointers is NULL.
ippStsSizeErr	Indicates an error condition if roiSize has a field with a zero or negative value.
ippStsStepErr	Indicates an error condition if srcStep or srcDstStep is less than roiSize.width * <pixelSize>.
ippStsNotEvenStepErr	Indicates an error condition if one of the step values is not divisible by 4 for floating-point images.
ippStsBadArgErr	Indicates an error condition if norm has an illegal value.

Example

/*******************************************************************************
* Copyright 2015 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.
*******************************************************************************/

// Performs morphological reconstruction of pSrcDst under/above pSrc
//     ippiMorphReconstructGetBufferSize
//     ippiMorphReconstructDilate_8u_C1IR



#include <stdio.h>
#include "ipp.h"

#define WIDTH  128  /* Image width  */
#define HEIGHT 128  /* Image height */
#define KERSIZE 3   /* Kernel size  */

/* 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) Integrated Primitives (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;
    IppiMorphAdvState *pState = NULL;
    IppiSize roiSize= { WIDTH, HEIGHT };            /* image size */
    IppiSize maskSize={3,3};                        /* mask size */
    Ipp8u *pSrc = NULL, *pDst = NULL, *pImg = NULL; /*  initial and working image */
    Ipp8u *pBuf = NULL, *pAdvBuf = NULL, pMask[9]={1,1,1,1,1,1,1,1,1};
    int srcStep = 0;                                /* srcStep, in bytes, through the source image */
    int size = 0, specSize = 0, bufferSize = 0;     /*  working buffers size */
    int cap = 100;                                  /* cap value */

    pSrc = ippiMalloc_8u_C1(roiSize.width, roiSize.height, &srcStep);

    pDst = ippiMalloc_8u_C1(roiSize.width, roiSize.height, &srcStep);

    pImg = ippiMalloc_8u_C1(roiSize.width, roiSize.height, &srcStep);

    check_sts( status = ippiMorphReconstructGetBufferSize(roiSize, ipp8u, 1, &size) )

    pBuf = ippsMalloc_8u(size);

    check_sts( status = ippiMorphAdvGetSize_8u_C1R( roiSize, maskSize, &specSize, &bufferSize ) )

    pState = (IppiMorphAdvState*)ippsMalloc_8u(specSize);

    pAdvBuf = (Ipp8u*)ippsMalloc_8u(bufferSize);

    check_sts( status = ippiMorphAdvInit_8u_C1R( roiSize, pMask, maskSize, pState, pAdvBuf ) )

    check_sts( status = ippiCopy_8u_C1R(pSrc, srcStep, pDst, srcStep, roiSize) )
    check_sts( status = ippiCopy_8u_C1R(pSrc, srcStep, pImg, srcStep, roiSize) )
    /* subtract cap size */
    check_sts( status = ippiSubC_8u_C1IRSfs(cap, pDst, srcStep, roiSize, 0) )
    /* reconstruct image */
    check_sts( status = ippiMorphReconstructDilate_8u_C1IR(pSrc, srcStep, pDst, srcStep, roiSize, pBuf, (IppiNorm)ippiNormL1) )
    /* get caps */
    check_sts( status = ippiSub_8u_C1IRSfs(pDst, srcStep, pImg, srcStep, roiSize, 0) )
    /* caps to white */
    check_sts( status = ippiThreshold_GTVal_8u_C1IR(pImg, srcStep, roiSize, 0, 255) )
    /* delete noise */
    check_sts( status = ippiMorphOpenBorder_8u_C1R(pImg, srcStep, pDst, srcStep, roiSize, 
                                   ippBorderRepl, 0, pState, pAdvBuf) )
    /* revert to get markers */
    check_sts( status = ippiXorC_8u_C1IR(0xff, pDst, srcStep, roiSize) )

EXIT_MAIN
    ippsFree(pBuf);
    ippsFree(pState);
    ippsFree(pAdvBuf);
    ippiFree(pSrc);
    ippiFree(pDst);
    ippiFree(pImg);
    printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status));
    return status;
}

Parent topic: Morphological Operations

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Intel® Integrated Performance Primitives Developer Guide and Reference

MorphReconstructDilate

Syntax

Include Files

Domain Dependencies

Parameters

Description

Return Values

Example