ImageDev

RegionalExtrema3d

Computes the regional extrema in a grayscale 3D image and marks them in a binary image.

Access to parameter description

For an introduction: This algorithm computes the regional or relative extrema in a 3D image and creates a binary image containing these extrema.

Function Syntax

This function returns outputBinaryImage. 
// Function prototype
std::shared_ptr< iolink::ImageView >
regionalExtrema3d( std::shared_ptr< iolink::ImageView > inputImage,
                   RegionalExtrema3d::ExtremaType extremaType,
                   RegionalExtrema3d::Neighborhood neighborhood,
                   std::shared_ptr< iolink::ImageView > outputBinaryImage = NULL );

Class Syntax

Parameters

Parameter Name Description Type Supported Values Default Value
input
inputImage
The input Grayscale image. Image Grayscale nullptr
input
extremaType
The type of extrema to detect.
MAXIMA The regional maxima are extracted from the input image.
MINIMA The regional minima are extracted from the input image.
Enumeration MAXIMA
input
neighborhood
The 3D neighborhood configuration.
CONNECTIVITY_6 The structuring element is composed of voxels with a common face with the voxel of interest.
CONNECTIVITY_18 The structuring element is composed of voxels with at least one common edge.
CONNECTIVITY_26 The structuring element is a full cube.
Enumeration CONNECTIVITY_26
output
outputBinaryImage
The output binary. Its dimensions is forced to the same values as the input. Image nullptr

Object Examples

auto foam = readVipImage( std::string( IMAGEDEVDATA_IMAGES_FOLDER ) + "foam.vip" );

RegionalExtrema3d regionalExtrema3dAlgo;
regionalExtrema3dAlgo.setInputImage( foam );
regionalExtrema3dAlgo.setExtremaType( RegionalExtrema3d::ExtremaType::MAXIMA );
regionalExtrema3dAlgo.setNeighborhood( RegionalExtrema3d::Neighborhood::CONNECTIVITY_26 );
regionalExtrema3dAlgo.execute();

std::cout << "outputBinaryImage:" << regionalExtrema3dAlgo.outputBinaryImage()->toString();

Function Examples

auto foam = readVipImage( std::string( IMAGEDEVDATA_IMAGES_FOLDER ) + "foam.vip" );

auto result = regionalExtrema3d( foam, RegionalExtrema3d::ExtremaType::MAXIMA, RegionalExtrema3d::Neighborhood::CONNECTIVITY_26 );

std::cout << "outputBinaryImage:" << result->toString();