ClosestBoundaryPoints2d

Computes the Chamfer distance map of the background of a two-dimensional image and the coordinates of the associated boundary points.

Access to parameter description

This algorithm is like the DistanceMap2d algorithm, applied on the background of the input image, and indicates the distance to the closest object boundary point.
It also stores the X and Y coordinates of the corresponding point in two additional output images.

Note: This algorithm does not take into account the input image calibration. The output values are systematically indicating distance in pixel units.

See also

Function Syntax

This function returns a ClosestBoundaryPoints2dOutput structure containing outputMapImage, outputImageX and outputImageY.

// Output structure of the closestBoundaryPoints2d function.
struct ClosestBoundaryPoints2dOutput
{
    /// The output background distance map image. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.
    std::shared_ptr< iolink::ImageView > outputMapImage;
    /// The X coordinate image of the closest boundary point, in pixel units. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.
    std::shared_ptr< iolink::ImageView > outputImageX;
    /// The Y coordinate image of the closest boundary point, in pixel units. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.
    std::shared_ptr< iolink::ImageView > outputImageY;
};

// Function prototype
ClosestBoundaryPoints2dOutput
closestBoundaryPoints2d( std::shared_ptr< iolink::ImageView > inputBinaryImage,
                         std::shared_ptr< iolink::ImageView > outputMapImage = NULL,
                         std::shared_ptr< iolink::ImageView > outputImageX = NULL,
                         std::shared_ptr< iolink::ImageView > outputImageY = NULL );

This function returns a tuple containing output_map_image, output_image_x and output_image_y.

// Function prototype.
closest_boundary_points_2d( input_binary_image,
                            output_map_image = None,
                            output_image_x = None,
                            output_image_y = None )

This function returns a ClosestBoundaryPoints2dOutput structure containing outputMapImage, outputImageX and outputImageY.

/// Output structure of the ClosestBoundaryPoints2d function.
public struct ClosestBoundaryPoints2dOutput
{
    /// 
    /// The output background distance map image. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.
    /// 
    public IOLink.ImageView outputMapImage;
    /// 
    /// The X coordinate image of the closest boundary point, in pixel units. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.
    /// 
    public IOLink.ImageView outputImageX;
    /// 
    /// The Y coordinate image of the closest boundary point, in pixel units. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.
    /// 
    public IOLink.ImageView outputImageY;
};

// Function prototype.
public static ClosestBoundaryPoints2dOutput
ClosestBoundaryPoints2d( IOLink.ImageView inputBinaryImage,
                         IOLink.ImageView outputMapImage = null,
                         IOLink.ImageView outputImageX = null,
                         IOLink.ImageView outputImageY = null );

Class Syntax

// Command constructor.
ClosestBoundaryPoints2d();

/// Gets the inputBinaryImage parameter.
/// The binary input image.
std::shared_ptr< iolink::ImageView > inputBinaryImage() const;
/// Sets the inputBinaryImage parameter.
/// The binary input image.
void setInputBinaryImage( std::shared_ptr< iolink::ImageView > inputBinaryImage );

/// Gets the outputMapImage parameter.
/// The output background distance map image. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.
std::shared_ptr< iolink::ImageView > outputMapImage() const;
/// Sets the outputMapImage parameter.
/// The output background distance map image. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.
void setOutputMapImage( std::shared_ptr< iolink::ImageView > outputMapImage );

/// Gets the outputImageX parameter.
/// The X coordinate image of the closest boundary point, in pixel units. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.
std::shared_ptr< iolink::ImageView > outputImageX() const;
/// Sets the outputImageX parameter.
/// The X coordinate image of the closest boundary point, in pixel units. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.
void setOutputImageX( std::shared_ptr< iolink::ImageView > outputImageX );

/// Gets the outputImageY parameter.
/// The Y coordinate image of the closest boundary point, in pixel units. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.
std::shared_ptr< iolink::ImageView > outputImageY() const;
/// Sets the outputImageY parameter.
/// The Y coordinate image of the closest boundary point, in pixel units. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.
void setOutputImageY( std::shared_ptr< iolink::ImageView > outputImageY );


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

# Property of the inputBinaryImage parameter.
ClosestBoundaryPoints2d.input_binary_image
# Property of the outputMapImage parameter.
ClosestBoundaryPoints2d.output_map_image
# Property of the outputImageX parameter.
ClosestBoundaryPoints2d.output_image_x
# Property of the outputImageY parameter.
ClosestBoundaryPoints2d.output_image_y

// Method to launch the command.
execute()

// Command constructor.
ClosestBoundaryPoints2d()

// Property of the inputBinaryImage parameter.
ClosestBoundaryPoints2d.inputBinaryImage
// Property of the outputMapImage parameter.
ClosestBoundaryPoints2d.outputMapImage
// Property of the outputImageX parameter.
ClosestBoundaryPoints2d.outputImageX
// Property of the outputImageY parameter.
ClosestBoundaryPoints2d.outputImageY

// Method to launch the command.
Execute()

Parameters

Class Name	ClosestBoundaryPoints2d

	Description	Type	Supported Values	Default Value
inputBinaryImage	The binary input image.	Image	Binary	nullptr
outputMapImage	The output background distance map image. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.	Image		nullptr
outputImageX	The X coordinate image of the closest boundary point, in pixel units. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.	Image		nullptr
outputImageY	The Y coordinate image of the closest boundary point, in pixel units. Its dimensions are forced to the same values as the input. Its type is signed 16-bit integer.	Image		nullptr

Object Examples

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

ClosestBoundaryPoints2d closestBoundaryPoints2dAlgo;
closestBoundaryPoints2dAlgo.setInputBinaryImage( polystyrene_sep );
closestBoundaryPoints2dAlgo.execute();

std::cout << "outputMapImage:" << closestBoundaryPoints2dAlgo.outputMapImage()->toString();
std::cout << "outputImageX:" << closestBoundaryPoints2dAlgo.outputImageX()->toString();
std::cout << "outputImageY:" << closestBoundaryPoints2dAlgo.outputImageY()->toString();

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

closest_boundary_points_2d_algo = imagedev.ClosestBoundaryPoints2d()
closest_boundary_points_2d_algo.input_binary_image = polystyrene_sep
closest_boundary_points_2d_algo.execute()

print( "output_map_image:", str( closest_boundary_points_2d_algo.output_map_image ) )
print( "output_image_x:", str( closest_boundary_points_2d_algo.output_image_x ) )
print( "output_image_y:", str( closest_boundary_points_2d_algo.output_image_y ) )

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

ClosestBoundaryPoints2d closestBoundaryPoints2dAlgo = new ClosestBoundaryPoints2d
{
    inputBinaryImage = polystyrene_sep
};
closestBoundaryPoints2dAlgo.Execute();

Console.WriteLine( "outputMapImage:" + closestBoundaryPoints2dAlgo.outputMapImage.ToString() );
Console.WriteLine( "outputImageX:" + closestBoundaryPoints2dAlgo.outputImageX.ToString() );
Console.WriteLine( "outputImageY:" + closestBoundaryPoints2dAlgo.outputImageY.ToString() );

Function Examples

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

auto result = closestBoundaryPoints2d( polystyrene_sep );

std::cout << "outputMapImage:" << result.outputMapImage->toString();
std::cout << "outputImageX:" << result.outputImageX->toString();
std::cout << "outputImageY:" << result.outputImageY->toString();

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

result_output_map_image, result_output_image_x, result_output_image_y = imagedev.closest_boundary_points_2d( polystyrene_sep )

print( "output_map_image:", str( result_output_map_image ) )
print( "output_image_x:", str( result_output_image_x ) )
print( "output_image_y:", str( result_output_image_y ) )

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

Processing.ClosestBoundaryPoints2dOutput result = Processing.ClosestBoundaryPoints2d( polystyrene_sep );

Console.WriteLine( "outputMapImage:" + result.outputMapImage.ToString() );
Console.WriteLine( "outputImageX:" + result.outputImageX.ToString() );
Console.WriteLine( "outputImageY:" + result.outputImageY.ToString() );