Deskew Method

Visual Basic
C#
Objective-C
Java
C++

[FaultContractAttribute(DetailType=Leadtools.Services.Raster.FaultContracts.RasterFault, 
   Action="", 
   Name="", 
   Namespace="", 
   ProtectionLevel=ProtectionLevel.None, 
   HasProtectionLevel=false)]
[OperationContractAttribute("Deskew")]
DeskewResponse Deskew( 
   DeskewRequest request
)

'Declaration
 
<FaultContractAttribute(DetailType=Leadtools.Services.Raster.FaultContracts.RasterFault, 
   Action="", 
   Name="", 
   Namespace="", 
   ProtectionLevel=ProtectionLevel.None, 
   HasProtectionLevel=False)>
<OperationContractAttribute("Deskew")>
Function Deskew( _
   ByVal request As DeskewRequest _
) As DeskewResponse

'Usage
 
Dim instance As IDocumentProcessingService
Dim request As DeskewRequest
Dim value As DeskewResponse
 
value = instance.Deskew(request)

[FaultContractAttribute(DetailType=Leadtools.Services.Raster.FaultContracts.RasterFault, 
   Action="", 
   Name="", 
   Namespace="", 
   ProtectionLevel=ProtectionLevel.None, 
   HasProtectionLevel=false)]
[OperationContractAttribute("Deskew")]
DeskewResponse^ Deskew( 
   DeskewRequest^ request
)

Parameters

request: A System.Runtime.Serialization.DataContractAttribute containing the data that will be used in this Deskew operation.

Return Value

A System.Runtime.Serialization.DataContractAttribute containing the modified image resulting from the Deskew operation.

If the Leadtools.Services.ImageProcessing.DataContracts.DeskewRequest.Flags property contains Leadtools.Services.ImageProcessing.DataContracts.DeskewCommandFlagsDeskewCommandFlags.ReturnAngleOnly, the operation will update the Leadtools.Services.ImageProcessing.DataContracts.DeskewResponse.Angle property without rotating the image.
The calculated rotation is limited to 20 degrees in either direction. This operation is intended for images, such as scanned documents, that are mainly horizontal lines of text. The results are less predictable with other types of images.
This operation includes an option to skip deskewing if the angle is very small.
This operation does not support 12 and 16-bit grayscale and 48 and 64-bit color images. If the image is 12 and 16-bit grayscale and 48 and 64-bit color, the operation will not throw an exception.
This operation does not support signed data images.
This operation does not support 32-bit grayscale images.

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

Copy Code

Imports Leadtools.Services
Imports leadtools.services.datacontracts._2009._01
Imports leadtools.services.raster.datacontracts._2009._01
Imports leadtools.services.imageprocessing.datacontracts._2009._01

Public Sub DeskewExample()
   Dim client As DocumentProcessingServiceClient = New DocumentProcessingServiceClient()
   Dim sourceBinaryData As RawBinaryData = New RawBinaryData()
   sourceBinaryData.Data = File.ReadAllBytes(Path.Combine(LEAD_VARS.ImagesDir, "clean.tif"))

   Dim convertOptions As RasterConvertOptions = New RasterConvertOptions()

   convertOptions.Source = sourceBinaryData
   convertOptions.Destination = Nothing
   convertOptions.Format = RasterImageFormat.Bmp
   convertOptions.FirstPage = 1
   convertOptions.LastPage = 1
   convertOptions.BitsPerPixel = 24
   convertOptions.QualityFactor = 2

   Dim request As DeskewRequest = New DeskewRequest()

   request.ConvertOptions = convertOptions
   request.RegionData = Nothing
   request.FillColor = "Red"
   request.Flags = DeskewCommandFlags.DeskewImage Or DeskewCommandFlags.DoNotFillExposedArea

   Dim response As CommandResponse = client.Deskew(request)
   If Not response.Destination Is Nothing Then
      If TypeOf response.Destination Is RawBinaryData Then
         File.WriteAllBytes(Path.Combine(LEAD_VARS.ImagesDir, "Deskew.bmp"), (TryCast(response.Destination, RawBinaryData)).Data)
      End If
   End If

   client.Close()
End Sub

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

using Leadtools.Services;
using leadtools.services.datacontracts._2009._01;
using leadtools.services.raster.datacontracts._2009._01;
using leadtools.services.imageprocessing.datacontracts._2009._01;

public void DeskewExample()
{
   DocumentProcessingServiceClient client = new DocumentProcessingServiceClient();
   RawBinaryData sourceBinaryData = new RawBinaryData();
   sourceBinaryData.Data = File.ReadAllBytes(Path.Combine(LEAD_VARS.ImagesDir,"clean.tif"));

   RasterConvertOptions convertOptions = new RasterConvertOptions();

   convertOptions.Source = sourceBinaryData;
   convertOptions.Destination = null;
   convertOptions.Format = RasterImageFormat.Bmp;
   convertOptions.FirstPage = 1;
   convertOptions.LastPage = 1;
   convertOptions.BitsPerPixel = 24;
   convertOptions.QualityFactor = 2;

   DeskewRequest request = new DeskewRequest();

   request.ConvertOptions = convertOptions;
   request.RegionData = null;
   request.FillColor = "Red";
   request.Flags = DeskewCommandFlags.DeskewImage | DeskewCommandFlags.DoNotFillExposedArea;

   CommandResponse response = client.Deskew(request);
   if (response.Destination != null)
   {
      if (response.Destination is RawBinaryData)
         File.WriteAllBytes(Path.Combine(LEAD_VARS.ImagesDir,"Deskew.bmp"), (response.Destination as RawBinaryData).Data);
   }

   client.Close();
}

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

Target Platforms

Reference

IDocumentProcessingService Interface
IDocumentProcessingService Members