Developer Reference

  • 2020
  • 07/15/2020
  • Public Content
Contents

MarkSpeckles

Marks small noise blobs (speckles) in an image.

Syntax

IppStatus ippiMarkSpeckles_<mod>(Ipp<datatype>*
pSrcDst
, int
srcDstStep
, IppiSize
roiSize
, Ipp<datatype>
speckleVal
, int
maxSpeckleSize
, Ipp<datatype>
maxPixDiff
, IppiNorm
norm
, Ipp8u*
pBuffer
);
Supported values for
mod
:
8u_C1IR
16u_C1IR
16s_C1IR
32f_C1IR
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
pSrcDst
Pointer to the source and destination image.
srcDstStep
Distance, in bytes, between the starting points of consecutive lines in the source and destination image.
roiSize
Size of the source and destination image ROI in pixels.
speckleVal
Value to set to the speckles.
maxSpeckleSize
Maximum size of the image component to consider it as a speckle.
maxPixDiff
Maximum difference between neighboring disparity pixels to put them into the same component.
norm
Type of the norm to form the mask for marker propagation. Possible value is:
ippiNormL1
L1 norm (4-connectivity)
pBuffer
Pointer to the work buffer.
Description
This function operates with ROI (see Regions of Interest in Intel IPP).
This function marks small noise blobs (speckles) in the source image.
The
pSrcDst
parameter points to the processed source and destination image ROI.
The function finds small connected components and set them to the
speckleVal
value. This function marks only components with size that is less than, or equal to
maxSpeckleSize
. Pixels of the image belong to the same connected component if the difference between adjacent pixels (considering 4-connected adjacency) is less than, or equal to the
maxSpeckleSize
value.
This release does not support 8-connectivity.
The function does not process the pixels of the image that already have the
speckleVal
value.
Before using the
ippiMarkSpeckles
function, compute the size of the external buffer using the MarkSpecklesGetBufferSize function.
Return Values
ippStsNoErr
Indicates no error.
ippStsNullPtrErr
Indicates an error when
pSrcDst
or
pBufferSize
is
NULL
.
ippStsSizeErr
Indicates an error when
roiSize
has a field with a zero or negative value.
ippStsNotEvenStepErr
Indicates an error when one of the step values is not divisible by 4 for floating-point images, or by 2 for short-integer images.
ippStsNormErr
Indicates an error when
norm
has an incorrect or not supported value.

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 performing filtering of small noise blobs (speckles) // in the image using Intel(R) Integrated Primitives (Intel(R) IPP) functions: // ippiMarkSpecklesGetBufferSize // ippiMarkSpeckles_8u_C1IR #include <stdio.h> #include "ipp.h" #define WIDTH 128 /* image width */ #define HEIGHT 64 /* image height */ /* 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; int numChannels = 1; Ipp8u* pSrcDst = NULL; /* Pointers to source/destination images */ int srcDstStep = 0; /* Steps, in bytes, through the source/destination images */ IppiSize roiSize = { WIDTH, HEIGHT }; /* Size of source/destination ROI in pixels */ Ipp8u speckleVal = 255; /* Disparity value */ Ipp8u maxPixDif = 1; /* Maximum difference between neighbor pixels */ Ipp32s maxSpeckleSize = 8; /* Maximum difference between neighbor pixels */ Ipp8u* pBuffer = NULL; /* Pointer to the work buffer */ int bufferSize = 0; /* Computes the temporary work buffer size */ check_sts( status = ippiMarkSpecklesGetBufferSize(roiSize, ipp8u, numChannels, &bufferSize) ) pBuffer = ippsMalloc_8u(bufferSize); pSrcDst = ippiMalloc_8u_C1(roiSize.width, roiSize.height, &srcDstStep); check_sts( status = ippiMarkSpeckles_8u_C1IR(pSrcDst, srcDstStep, roiSize, speckleVal, maxSpeckleSize, maxPixDif, ippiNormL1, pBuffer) ) EXIT_MAIN ippiFree(pSrcDst); ippsFree(pBuffer); printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status)); return (int)status; }

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804