PolarCommand Class

C#
Visual Basic
WinRT C#
Objective-C
Java
WinRT JavaScript
C++

public class PolarCommand : Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

'Declaration
 
Public Class PolarCommand 
   Inherits Leadtools.ImageProcessing.RasterCommand
   Implements Leadtools.ImageProcessing.IRasterCommand

'Usage
 
Dim instance As PolarCommand

public sealed class PolarCommand : Leadtools.ImageProcessing.IRasterCommand

function Leadtools.ImageProcessing.SpecialEffects.PolarCommand()

public ref class PolarCommand : public Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

This command converts an image from Cartesian (rectangular) coordinates to polar coordinates or vice versa. Rectangular coordinates use the form (x, y) where 'x' and 'y' are the horizontal and vertical distances from the origin, respectively. Polar coordinates are in the form (r, E) where 'r' is the distance from the origin to the point and 'E' is the angle of the line the point makes with the positive x-axis. Polar coordinates use a grid made of concentric circles around the origin, along with lines that are rays radiating outward from the origin.
This command considers the positions of the image's pixels as values in a polar coordinate system. Then it converts all the pixels in a line of the image into a circle around the center of the image.
If there is any region selected on the image, the effect will be applied on the region dimensions only.
This command supports 12- and 16-bit grayscale and 48- and 64-bit color images. Support for 12- and 16-bit grayscale and 48- and 64-bit color images is available only in the Document/Medical toolkits.
This command does not support signed data images.
This command does not support 32-bit grayscale images.

For more information, refer to Introduction to Image Processing With LEADTOOLS.
For more information, refer to Applying Artistic Effects.

Convert to polar coordinate.

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.SpecialEffects

<TestMethod()> _
Public Sub PolarCommandExample()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "sample5.cmp"))

   ' Prepare the command
   Dim command As PolarCommand = New PolarCommand
   command.FillColor = New RasterColor(0, 0, 0)
   command.Flags = PolarCommandFlags.Repeat Or PolarCommandFlags.CartToPolar
   command.Run(leadImage)
   codecs.Save(leadImage, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24)

End Sub

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.SpecialEffects;

[TestMethod]
public void PolarCommandExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "sample5.cmp"));

   // Prepare the command
   PolarCommand command   = new PolarCommand();
   command.FillColor      = new Leadtools.RasterColor(0,0,0);
   command.Flags          = PolarCommandFlags.Repeat | PolarCommandFlags.CartToPolar;
   command.Run(image);
   codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24);

}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.SpecialEffects;

[TestMethod]
public async Task PolarCommandExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   string srcFileName = @"Assets\Image1.cmp";
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   // Prepare the command
   PolarCommand command   = new PolarCommand();
   command.FillColor      = RasterColorHelper.Create(0,0,0);
   command.Flags          = PolarCommandFlags.Repeat | PolarCommandFlags.CartToPolar;
   command.Run(image);

   string destFileName = @"result.bmp";
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName);
   await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Bmp, 24);
}

Target Platforms

Reference