SnnFilter3d

Performs an edge-preserving smoothing of a three-dimensional image with the Symmetric Nearest Neighbor filter.

Access to parameter description

For an introduction to image filters: Images Filtering.

This algorithm implements the Symmetric Nearest Neighbor filter (SNN), which is an average filter weighted by the structural symmetry of a rectangular neighborhood window. It computes a local mean around a central voxel

$x$ , considering for each neighbor voxel

$y$ , having a gray level

$I(y)$ , the value given by:

$I'(y)=\left\{\begin{array}{ll} I(y) & ~\mbox{if $|I(x)-I(y)| < |I(x)-I(y_s)|$} \\ I(y_s) & ~\mbox{if $|I(x)-I(y)| > |I(x)-I(y_s)|$} \\ I(x) & ~\mbox{otherwise} \end{array}\right.$ Where

$y_s$ is the neighbor voxel symmetric to

$y$ with respect to

$x$ .

The output value of the voxel

$x$ is then given by:

$O(x)=\mu[I'(y)]$ Where

$\mu$ is the mean value of the local window.

See also

Function Syntax

This function returns the outputImage output parameter.

// Function prototype.
std::shared_ptr< iolink::ImageView >
snnFilter3d( std::shared_ptr< iolink::ImageView > inputImage,
             int32_t kernelSizeX,
             int32_t kernelSizeY,
             int32_t kernelSizeZ,
             std::shared_ptr< iolink::ImageView > outputImage = NULL );

This function returns the outputImage output parameter.

// Function prototype.
snn_filter_3d( input_image,
               kernel_size_x = 3,
               kernel_size_y = 3,
               kernel_size_z = 3,
               output_image = None )

This function returns the outputImage output parameter.

// Function prototype.
public static IOLink.ImageView
SnnFilter3d( IOLink.ImageView inputImage,
             Int32 kernelSizeX = 3,
             Int32 kernelSizeY = 3,
             Int32 kernelSizeZ = 3,
             IOLink.ImageView outputImage = null );

Class Syntax

// Command constructor.
SnnFilter3d();

// Get method of the inputImage parameter.
std::shared_ptr< iolink::ImageView > inputImage() const;
// Set method of the inputImage parameter.
void setInputImage( std::shared_ptr< iolink::ImageView > inputImage );

// Get method of the kernelSizeX parameter.
int32_t kernelSizeX() const;
// Set method of the kernelSizeX parameter.
void setKernelSizeX( const int32_t& kernelSizeX );

// Get method of the kernelSizeY parameter.
int32_t kernelSizeY() const;
// Set method of the kernelSizeY parameter.
void setKernelSizeY( const int32_t& kernelSizeY );

// Get method of the kernelSizeZ parameter.
int32_t kernelSizeZ() const;
// Set method of the kernelSizeZ parameter.
void setKernelSizeZ( const int32_t& kernelSizeZ );

// Get method of the outputImage parameter.
std::shared_ptr< iolink::ImageView > outputImage() const;
// Set method of the outputImage parameter.
void setOutputImage( std::shared_ptr< iolink::ImageView > outputImage );

// Method to launch the command.
void execute();

// Property of the inputImage parameter.
SnnFilter3d.input_image
// Property of the kernelSizeX parameter.
SnnFilter3d.kernel_size_x
// Property of the kernelSizeY parameter.
SnnFilter3d.kernel_size_y
// Property of the kernelSizeZ parameter.
SnnFilter3d.kernel_size_z
// Property of the outputImage parameter.
SnnFilter3d.output_image

// Method to launch the command.
execute()

// Command constructor.
SnnFilter3d()

// Property of the inputImage parameter.
SnnFilter3d.inputImage
// Property of the kernelSizeX parameter.
SnnFilter3d.kernelSizeX
// Property of the kernelSizeY parameter.
SnnFilter3d.kernelSizeY
// Property of the kernelSizeZ parameter.
SnnFilter3d.kernelSizeZ
// Property of the outputImage parameter.
SnnFilter3d.outputImage

// Method to launch the command.
Execute()

Parameters

Class Name	SnnFilter3d

	Description	Type	Supported Values	Default Value
inputImage	The input image.	Image	Binary, Label, Grayscale or Multispectral	nullptr
kernelSizeX	The horizontal kernel size in voxels (odd value).	Int32	[3, 100]	3
kernelSizeY	The vertical kernel size in voxels (odd value).	Int32	[3, 100]	3
kernelSizeZ	The depth kernel size in voxels (odd value).	Int32	[3, 100]	3
outputImage	The output image. Its dimensions, type, and calibration are forced to the same values as the input.	Image		nullptr

Object Examples

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

SnnFilter3d snnFilter3dAlgo;
snnFilter3dAlgo.setInputImage( foam );
snnFilter3dAlgo.setKernelSizeX( 3 );
snnFilter3dAlgo.setKernelSizeY( 3 );
snnFilter3dAlgo.setKernelSizeZ( 3 );
snnFilter3dAlgo.execute();

std::cout << "outputImage:" << snnFilter3dAlgo.outputImage()->toString();

foam = imagedev.read_vip_image(imagedev_data.get_image_path("foam.vip"))

snn_filter_3d_algo = imagedev.SnnFilter3d()
snn_filter_3d_algo.input_image = foam
snn_filter_3d_algo.kernel_size_x = 3
snn_filter_3d_algo.kernel_size_y = 3
snn_filter_3d_algo.kernel_size_z = 3
snn_filter_3d_algo.execute()

print( "output_image:", str( snn_filter_3d_algo.output_image ) );

ImageView foam = Data.ReadVipImage( @"Data/images/foam.vip" );

SnnFilter3d snnFilter3dAlgo = new SnnFilter3d
{
    inputImage = foam,
    kernelSizeX = 3,
    kernelSizeY = 3,
    kernelSizeZ = 3
};
snnFilter3dAlgo.Execute();

Console.WriteLine( "outputImage:" + snnFilter3dAlgo.outputImage.ToString() );

Function Examples

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

auto result = snnFilter3d( foam, 3, 3, 3 );

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

foam = imagedev.read_vip_image(imagedev_data.get_image_path("foam.vip"))

result = imagedev.snn_filter_3d( foam, 3, 3, 3 )

print( "output_image:", str( result ) );

ImageView foam = Data.ReadVipImage( @"Data/images/foam.vip" );

IOLink.ImageView result = Processing.SnnFilter3d( foam, 3, 3, 3 );

Console.WriteLine( "outputImage:" + result.ToString() );

SnnFilter3d

- Function Syntax

+ Class Syntax

Parameters

Object Examples

Function Examples

Function Syntax

Class Syntax