ImageDev

ErosionLine3d

Performs a three-dimensional erosion using a structuring element matching with a line.

Access to parameter description

For an introduction: The erosion line is oriented in the direction given by ($\theta$, $\varphi$) in spherical coordinates as often used in mathematics (azimuthal angle, $\theta$ and polar angle, $\varphi$). This direction is described with the following formula: $$V=\left[\begin{array}{c}; v_x\\ v_y\\ v_z\end{array}\right] = \left[\begin{array}{c}; \sin(\varphi)\cos(\theta)\\ \sin(\varphi)\sin(\theta)\\ \cos(\varphi)\end{array}\right]$$ This direction can be illustrated on the unit sphere:

<b> Figure 1.</b> Azimuthal and polar angles on the unit sphere
Figure 1. Azimuthal and polar angles on the unit sphere

See also

Function Syntax

This function returns the outputImage output parameter. 
// Function prototype.
std::shared_ptr< iolink::ImageView >
erosionLine3d( std::shared_ptr< iolink::ImageView > inputImage,
               double thetaAngle,
               double phiAngle,
               uint32_t kernelRadius,
               std::shared_ptr< iolink::ImageView > outputImage = NULL );
This function returns the outputImage output parameter. 
// Function prototype.
erosion_line_3d( input_image,
                 theta_angle = 0,
                 phi_angle = 0,
                 kernel_radius = 3,
                 output_image = None )
This function returns the outputImage output parameter. 
// Function prototype.
public static IOLink.ImageView
ErosionLine3d( IOLink.ImageView inputImage,
               double thetaAngle = 0,
               double phiAngle = 0,
               UInt32 kernelRadius = 3,
               IOLink.ImageView outputImage = null );

Class Syntax

Parameters

Class Name ErosionLine3d

Parameter Name Description Type Supported Values Default Value
input
inputImage
The input image. The image type can be integer or float. Image Binary, Label, Grayscale or Multispectral nullptr
input
thetaAngle
The azimuthal angle in degrees. Float64 Any value 0
input
phiAngle
The polar angle in degrees. Float64 Any value 0
input
kernelRadius
The length of the linear structuring element in pixels. UInt32 >=1 3
output
outputImage
The output image. Its dimensions and type are forced to the same values as the input image. Image nullptr

Object Examples

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

ErosionLine3d erosionLine3dAlgo;
erosionLine3dAlgo.setInputImage( foam );
erosionLine3dAlgo.setThetaAngle( 0 );
erosionLine3dAlgo.setPhiAngle( 0 );
erosionLine3dAlgo.setKernelRadius( 3 );
erosionLine3dAlgo.execute();

std::cout << "outputImage:" << erosionLine3dAlgo.outputImage()->toString();

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

erosion_line_3d_algo = imagedev.ErosionLine3d()
erosion_line_3d_algo.input_image = foam
erosion_line_3d_algo.theta_angle = 0
erosion_line_3d_algo.phi_angle = 0
erosion_line_3d_algo.kernel_radius = 3
erosion_line_3d_algo.execute()

print( "output_image:", str( erosion_line_3d_algo.output_image ) );

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

ErosionLine3d erosionLine3dAlgo = new ErosionLine3d
{
    inputImage = foam,
    thetaAngle = 0,
    phiAngle = 0,
    kernelRadius = 3
};
erosionLine3dAlgo.Execute();

Console.WriteLine( "outputImage:" + erosionLine3dAlgo.outputImage.ToString() );

Function Examples

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

auto result = erosionLine3d( foam, 0, 0, 3 );

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

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

result = imagedev.erosion_line_3d( foam, 0, 0, 3 )

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

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

IOLink.ImageView result = Processing.ErosionLine3d( foam, 0, 0, 3 );

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