ManualPerspectiveDeskewCommand Class

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

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

'Declaration

Public Class ManualPerspectiveDeskewCommand 
   Inherits Leadtools.ImageProcessing.RasterCommand
   Implements Leadtools.ImageProcessing.IRasterCommand

'Usage

Dim instance As ManualPerspectiveDeskewCommand

public sealed class ManualPerspectiveDeskewCommand : Leadtools.ImageProcessing.IRasterCommand

@interface LTManualPerspectiveDeskewCommand : LTRasterCommand

public class ManualPerspectiveDeskewCommand extends RasterCommand

function Leadtools.ImageProcessing.Core.ManualPerspectiveDeskewCommand()

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

The ManualPerspectiveDeskewCommand can change the specified image. To keep the original image unchanged, use this function on a copy.
Typically, this command is used as a step in preprocessing images from digital cameras. It changes the image based on a view perspective equation, taking the depth of the objects into account as well as their relative dimensions.
It is best to choose input points that are far apart from each other.
Use the ManualPerspectiveDeskewCommand, PerspectiveDeskewCommand or KeyStoneCommand if there is a planar deformation along all three axes. Use the UnWarpCommand if there is a cylindrical deformation. Use the DeskewCommand if there is deformation along the x- and y- axes.
Use the Run method to fix the distorted image. Obtain the deskewed image from the OutputImage property.
This function supports 24- and 36-bit color images and 8- and 16-bit grayscale images. Support for 16-bit grayscale is available in the Document/Medical Imaging toolkits. This command supports signed/unsigned images.

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

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Core

   
Public Sub ManualPerspectiveDeskewCommandExample()
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True
   'Load an image
   Dim image As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "PerspectiveDeskew.jpg"))

   'Dim PolyPoints As List(Of LeadPoint) = New List(Of LeadPoint)()
   Dim PolyPoints() As LeadPoint = New LeadPoint(4) {}
   Dim MappingPoints() As LeadPoint = New LeadPoint(4) {}

   'The four corners of the polygon
   PolyPoints(0) = New LeadPoint(131, 193)
   PolyPoints(1) = New LeadPoint(456, 151)
   PolyPoints(2) = New LeadPoint(535, 282)
   PolyPoints(3) = New LeadPoint(124, 354)

   'Prepare the command
   Dim command As ManualPerspectiveDeskewCommand = New ManualPerspectiveDeskewCommand()

   command.InPoints = PolyPoints

   MappingPoints(0) = New LeadPoint(0, 0)
   MappingPoints(1) = New LeadPoint(610, 0)
   MappingPoints(2) = New LeadPoint(610, 421)
   MappingPoints(3) = New LeadPoint(0, 421)

   command.MappingPoints = MappingPoints


   'Apply 
   command.Run(image)

   codecs.Save(command.OutputImage, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), image.OriginalFormat, image.BitsPerPixel)

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.Core;

      
public void ManualPerspectiveDeskewCommandExample()
{
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   //Load an image
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "PerspectiveDeskew.jpg"));

   LeadPoint[] PolyPoints = new LeadPoint[4];
   LeadPoint[] MappingPoints = new LeadPoint[4];

   //The four corners of the polygon
   PolyPoints[0] = new LeadPoint(131, 193);
   PolyPoints[1] = new LeadPoint(456, 151);
   PolyPoints[2] = new LeadPoint(535, 282);
   PolyPoints[3] = new LeadPoint(124, 354);

   //Prepare the command
   ManualPerspectiveDeskewCommand command = new ManualPerspectiveDeskewCommand();

   command.InPoints = PolyPoints;

   MappingPoints[0] = new LeadPoint(0, 0);
   MappingPoints[1] = new LeadPoint(610, 0);
   MappingPoints[2] = new LeadPoint(610, 421);
   MappingPoints[3] = new LeadPoint(0, 421);

   command.MappingPoints = MappingPoints;

   //Apply 
   command.Run(image);

   codecs.Save(command.OutputImage, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), image.OriginalFormat, image.BitsPerPixel);
}

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

Target Platforms

Reference

ManualPerspectiveDeskewCommand Members
Leadtools.ImageProcessing.Core Namespace