CartesianToPolar2d
Transforms a pair of real and imaginary part two-dimensional images into a pair of module and phase images.
Access to parameter description
For an introduction: see section Frequency Domain.
This algorithm computes the cartesian-to-polar transformation or real/imaginary to the module/phase transformation.
If $I_1$ is the real part or $X$ coordinate image and $I_2$ the imaginary part or $Y$ coordinate image, then:
Access to parameter description
For an introduction: see section Frequency Domain.
This algorithm computes the cartesian-to-polar transformation or real/imaginary to the module/phase transformation.
If $I_1$ is the real part or $X$ coordinate image and $I_2$ the imaginary part or $Y$ coordinate image, then:
- Module image $O_1$ is defined as: $O_1(n,m)=\sqrt{I_1^2(n,m)+I_2^2(n,m)}$
- Phase image $O_2$ is defined as: $O_2(n,m)=\tan^{-1}\left(\frac{I_2(n,m)}{I_1(n,m)}\right)$
Function Syntax
This function returns a CartesianToPolar2dOutput structure containing the outputModulusImage and outputPhaseImage output parameters.
// Output structure.
struct CartesianToPolar2dOutput
{
std::shared_ptr< iolink::ImageView > outputModulusImage;
std::shared_ptr< iolink::ImageView > outputPhaseImage;
};
// Function prototype.
CartesianToPolar2dOutput
cartesianToPolar2d( std::shared_ptr< iolink::ImageView > inputRealImage,
std::shared_ptr< iolink::ImageView > inputImaginaryImage,
std::shared_ptr< iolink::ImageView > outputModulusImage = NULL,
std::shared_ptr< iolink::ImageView > outputPhaseImage = NULL );
This function returns a tuple containing the output_modulus_image and output_phase_image output parameters.
// Function prototype.
cartesian_to_polar_2d( input_real_image,
input_imaginary_image,
output_modulus_image = None,
output_phase_image = None )
This function returns a CartesianToPolar2dOutput structure containing the outputModulusImage and outputPhaseImage output parameters.
/// Output structure of the CartesianToPolar2d function.
public struct CartesianToPolar2dOutput
{
public IOLink.ImageView outputModulusImage;
public IOLink.ImageView outputPhaseImage;
};
// Function prototype.
public static CartesianToPolar2dOutput
CartesianToPolar2d( IOLink.ImageView inputRealImage,
IOLink.ImageView inputImaginaryImage,
IOLink.ImageView outputModulusImage = null,
IOLink.ImageView outputPhaseImage = null );
Class Syntax
Parameters
| Class Name | CartesianToPolar2d |
|---|
| Parameter Name | Description | Type | Supported Values | Default Value | |
|---|---|---|---|---|---|
 |
inputRealImage |
The real part input image. It must be a floating point image. | Image | Grayscale or Multispectral | nullptr |
|
inputImaginaryImage |
The imaginary part input image. This image must have same dimensions and data type as the real input image. | Image | Grayscale or Multispectral | nullptr |
 |
outputModulusImage |
The output modulus image. Its dimensions and type are forced to the same values as the input. | Image | nullptr | |
|
outputPhaseImage |
The output phase image. Its dimensions and type are forced to the same values as the input. | Image | nullptr | |
Object Examples
auto polystyrene_float = readVipImage( std::string( IMAGEDEVDATA_IMAGES_FOLDER ) + "polystyrene_float.vip" ); CartesianToPolar2d cartesianToPolar2dAlgo; cartesianToPolar2dAlgo.setInputRealImage( polystyrene_float ); cartesianToPolar2dAlgo.setInputImaginaryImage( polystyrene_float ); cartesianToPolar2dAlgo.execute(); std::cout << "outputModulusImage:" << cartesianToPolar2dAlgo.outputModulusImage()->toString(); std::cout << "outputPhaseImage:" << cartesianToPolar2dAlgo.outputPhaseImage()->toString();
polystyrene_float = imagedev.read_vip_image(imagedev_data.get_image_path("polystyrene_float.vip"))
cartesian_to_polar_2d_algo = imagedev.CartesianToPolar2d()
cartesian_to_polar_2d_algo.input_real_image = polystyrene_float
cartesian_to_polar_2d_algo.input_imaginary_image = polystyrene_float
cartesian_to_polar_2d_algo.execute()
print( "output_modulus_image:", str( cartesian_to_polar_2d_algo.output_modulus_image ) )
print( "output_phase_image:", str( cartesian_to_polar_2d_algo.output_phase_image ) )
ImageView polystyrene_float = Data.ReadVipImage( @"Data/images/polystyrene_float.vip" );
CartesianToPolar2d cartesianToPolar2dAlgo = new CartesianToPolar2d
{
inputRealImage = polystyrene_float,
inputImaginaryImage = polystyrene_float
};
cartesianToPolar2dAlgo.Execute();
Console.WriteLine( "outputModulusImage:" + cartesianToPolar2dAlgo.outputModulusImage.ToString() );
Console.WriteLine( "outputPhaseImage:" + cartesianToPolar2dAlgo.outputPhaseImage.ToString() );
Function Examples
auto polystyrene_float = readVipImage( std::string( IMAGEDEVDATA_IMAGES_FOLDER ) + "polystyrene_float.vip" ); auto result = cartesianToPolar2d( polystyrene_float, polystyrene_float ); std::cout << "outputModulusImage:" << result.outputModulusImage->toString(); std::cout << "outputPhaseImage:" << result.outputPhaseImage->toString();
polystyrene_float = imagedev.read_vip_image(imagedev_data.get_image_path("polystyrene_float.vip"))
result_output_modulus_image, result_output_phase_image = imagedev.cartesian_to_polar_2d( polystyrene_float, polystyrene_float )
print( "output_modulus_image:", str( result_output_modulus_image ) )
print( "output_phase_image:", str( result_output_phase_image ) )
ImageView polystyrene_float = Data.ReadVipImage( @"Data/images/polystyrene_float.vip" ); Processing.CartesianToPolar2dOutput result = Processing.CartesianToPolar2d( polystyrene_float, polystyrene_float ); Console.WriteLine( "outputModulusImage:" + result.outputModulusImage.ToString() ); Console.WriteLine( "outputPhaseImage:" + result.outputPhaseImage.ToString() );