DetectDeskewOrientationCommand Class

Summary

This command supports detecting deskew and orientation angles.

Syntax

C++

public class DetectDeskewOrientationCommand : RasterCommand

Public Class DetectDeskewOrientationCommand 
   Inherits RasterCommand

public: 
   ref class DetectDeskewOrientationCommand : RasterCommand

Remarks

This command contains special algorithms for detecting skewed checks.

This command does not support signed data images.

The calculated rotation is limited to 20 degrees in either direction. This command 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 command does not support 12- and 16-bit grayscale or 48- and 64-bit color images. If the image is 12- and 16-bit grayscale or 48- and 64-bit color, the function will not return an error.

This command does not support 32-bit grayscale images.

Example

Runs the DetectDeskewOrientationCommand on an image.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void DetectDeskewOrientationCommandExample() 
{ 
   // Load an image  
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, @"Forms\Forms to be Recognized\OCR\FCC-107_OCR_Filled.tif")); 
 
   // Prepare the command  
   DetectDeskewOrientationCommand command = new DetectDeskewOrientationCommand(); 
   // Detect/correct skew and orientation, filling with black  
   command.DeskewDetection.FillColor = RasterColor.Black; 
   command.DeskewDetection.Flags = DeskewDetectionDataFlags.DocumentAndPictures | DeskewDetectionDataFlags.RotateBicubic; 
   command.Flags = DetectDeskewOrientationCommandFlags.None; 
   command.OrientationDetection.Flags = OrientationDetectionDataFlags.None; 
   command.Run(image);  
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS21\Resources\Images"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
Public Sub DetectDeskewOrientationCommandExample() 
   ' Load an image  
   Dim codecs As RasterCodecs = New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim image As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Forms\Forms to be Recognized\OCR\FCC-107_OCR_Filled.tif")) 
 
   ' Prepare the command  
   Dim command As DetectDeskewOrientationCommand = New DetectDeskewOrientationCommand() 
   ' Detect/correct skew and orientation, filling with black  
   command.DeskewDetection.FillColor = RasterColor.Black 
   command.DeskewDetection.Flags = DeskewDetectionDataFlags.DocumentAndPictures Or DeskewDetectionDataFlags.RotateBicubic 
   command.Flags = DetectDeskewOrientationCommandFlags.None 
   command.OrientationDetection.Flags = OrientationDetectionDataFlags.None 
   command.Run(image) 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\LEADTOOLS21\Resources\Images" 
End Class