FourierTransformDisplayCommand Constructor(FourierTransformInformation,FourierTransformDisplayCommandFlags)

Summary

Initializes a new FourierTransformDisplayCommand class object with explicit parameters.

Syntax

Objective-C

C++/CLI

Python

public FourierTransformDisplayCommand( 
   FourierTransformInformation fourierTransformInformation, 
   FourierTransformDisplayCommandFlags flags 
)

- (instancetype)initWithInformation:(null_unspecified LTFourierTransformInformation *)information flags:(LTFourierTransformDisplayCommandFlags)flags NS_DESIGNATED_INITIALIZER;

public: 
FourierTransformDisplayCommand(  
   FourierTransformInformation^ fourierTransformInformation, 
   FourierTransformDisplayCommandFlags flags 
)

__init__(self,fourierTransformInformation,flags) # Overloaded constructor

Parameters

fourierTransformInformation
FourierTransformInformation structure. The Data property of the FourierTransformInformation object is a two-dimensional array that will hold the frequency components of the image. Its dimensions must be the same as the image dimensions.

flags
Flags that indicate the data to be shown and the plotting scale. You can use a bit-wise OR ( | ) to specify one flag from each group.

Example

Runs the FourierTransformDisplayCommand on an image, applies the Discrete Fourier Transform command to it, and displays the data.

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void FourierTransformDisplayConstructorExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, @"ImageProcessingDemo\FourierTransform.jpg")); 
 
   // Prepare the command 
   FourierTransformInformation ftArray = new FourierTransformInformation(image); 
   LeadRect rcRange = new LeadRect(0, 0, image.Width - 1, image.Height - 1); 
   DiscreteFourierTransformCommand dftCommand = new DiscreteFourierTransformCommand(); 
 
   dftCommand.FourierTransformInformation = ftArray; 
   dftCommand.Range = rcRange; 
   dftCommand.Flags = DiscreteFourierTransformCommandFlags.DiscreteFourierTransform | 
      DiscreteFourierTransformCommandFlags.Gray | 
      DiscreteFourierTransformCommandFlags.Range | 
      DiscreteFourierTransformCommandFlags.InsideX | 
      DiscreteFourierTransformCommandFlags.InsideY; 
   // apply DFT 
   dftCommand.Run(image); 
 
   FourierTransformDisplayCommand command = new FourierTransformDisplayCommand(ftArray, FourierTransformDisplayCommandFlags.Log | FourierTransformDisplayCommandFlags.Magnitude); 
   //plot frequency magnitude. 
   command.Run(image); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import static org.junit.Assert.assertTrue; 
 
import java.io.File; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.core.*; 
 
 
public void fourierTransformDisplayConstructorExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.setThrowExceptionsOnInvalidImages(true); 
 
   RasterImage image = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "FourierTransform.jpg")); 
 
   // Prepare the command 
   FourierTransformInformation ftArray = new FourierTransformInformation(image); 
   FourierTransformDisplayCommand command = new FourierTransformDisplayCommand(ftArray, 
         FourierTransformDisplayCommandFlags.LOG.getValue() 
               | FourierTransformDisplayCommandFlags.MAGNITUDE.getValue()); 
 
   // Plot frequency magnitude. 
   command.run(image); 
   codecs.save(image, (combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")), RasterImageFormat.JPEG, 0); 
 
   assertTrue(new File(combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")).exists()); 
   System.out.println("Command run and image saved to " + combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")); 
 
}

Requirements

Target Platforms

Reference

FourierTransformDisplayCommand Class

FourierTransformDisplayCommand Members

Overload List

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Help Version 23.0.2024.3.3

Leadtools.ImageProcessing.Core Assembly

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