IsRegistrationMark Method

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public static bool IsRegistrationMark( 
   RasterImage image,
   RegistrationMarkCommandType type,
   int minScale,
   int maxScale,
   int width,
   int height
)

'Declaration
 
Public Shared Function IsRegistrationMark( _
   ByVal image As RasterImage, _
   ByVal type As RegistrationMarkCommandType, _
   ByVal minScale As Integer, _
   ByVal maxScale As Integer, _
   ByVal width As Integer, _
   ByVal height As Integer _
) As Boolean

'Usage
 
Dim image As RasterImage
Dim type As RegistrationMarkCommandType
Dim minScale As Integer
Dim maxScale As Integer
Dim width As Integer
Dim height As Integer
Dim value As Boolean
 
value = CoreUtilities.IsRegistrationMark(image, type, minScale, maxScale, width, height)

public static bool IsRegistrationMark( 
   RasterImage image,
   RegistrationMarkCommandType type,
   int minScale,
   int maxScale,
   int width,
   int height
)

 function Leadtools.ImageProcessing.Core.CoreUtilities.IsRegistrationMark( 
   image ,
   type ,
   minScale ,
   maxScale ,
   width ,
   height 
)

public:
static bool IsRegistrationMark( 
   RasterImage^ image,
   RegistrationMarkCommandType type,
   int minScale,
   int maxScale,
   int width,
   int height
)

Parameters

image: RasterImage object that references the image to be searched for registration mark.
type: Value that specifies the type of registration mark for which to look. Currently, only one registration mark is defined (T-shape). See the Comments for more information. More shapes will be added in the future.
minScale: Minimum scaling factor of mark to be detected. This is a percentage. It must not exceed maxScale, or an error will be returned. This parameter accepts only positive values.
maxScale: Maximum scaling factor of mark to be detected. This is a percentage. It must not be lower than minScale, or an error will be returned. This parameter accepts only positive values.
width: The width of the registration mark (in pixels). This parameter accepts only positive values.
height: The height of the registration mark (in pixels). This parameter accepts only positive values.

Return Value

Boolean value indicating weather that specific object is registration mark or not.

This method verifies whether the object inside the image is a registration mark. The object must be white and the background be black. Objects that are not white will not be detected. The image must have only one object inside it in order to work properly.
Currently, there is only one type defined, a T-shaped figure as shown in the following figure. This type is a "T" rotated by 90 degrees counter clockwise. The P4 point must be on the center point of Line P1P2 (that is, the distance from P1 to P4 equals the distance from P2 to P4). The line width should be greater than 2 pixels(preferably 3 pixels). There are no conditions on line lengths since you provide the values for width, height, maxScale, and minScale.
Do not use this command to search for registration marks inside the image. Use SearchRegistrationMarksCommand instead.
If you simply want to automatically straighten the image, use the DeskewCommand.
This method 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 method does not support signed data images.

For more information, refer to Detecting Registration Marks.

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

Public Sub IsRegistrationMarkExample()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True

   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"))

   ' Prepare the command
   Dim IsRegMark As Boolean
   IsRegMark = CoreUtilities.IsRegistrationMark(leadImage, RegistrationMarkCommandType.TShape, 90, 110, 31, 29)
   If (IsRegMark) Then
      MessageBox.Show("It's Registration Mark", "IsRegistrationMarkTest")
   Else
      MessageBox.Show("Not a Registration Mark", "IsRegistrationMarkTest")
   End If

End Sub

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

public void IsRegistrationMarkExample()
   {
      // Load an image
      RasterCodecs codecs = new RasterCodecs();
      codecs.ThrowExceptionsOnInvalidImages = true;

      RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"));

      // Prepare the command
      bool IsRegMark = CoreUtilities.IsRegistrationMark(image, RegistrationMarkCommandType.TShape, 90, 110, 31, 29);
      MessageBox.Show(IsRegMark ? "It's Registration Mark" : "Not a Registration Mark");

   }

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

//   [TestMethod]
//   public async Task IsRegistrationMarkExample()
//   {
//      // Load an image
//      RasterCodecs codecs = new RasterCodecs();
//      codecs.ThrowExceptionsOnInvalidImages = true;

//      // Load the image
//      string srcFileName = @"Assets\Image1.cmp";
//      StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
//      RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

//      // Prepare the command
//      bool IsRegMark = CoreUtilities.IsRegistrationMark(image, RegistrationMarkCommandType.TShape, 90, 110, 31, 29);
//      Debug.WriteLine(IsRegMark ? "It's Registration Mark" : "Not a Registration Mark");

//   }
//

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

   // Prepare the command
   bool IsRegMark = CoreUtilities.IsRegistrationMark(image, RegistrationMarkCommandType.TShape, 90, 110, 31, 29);
   Debug.WriteLine(IsRegMark ? "It's Registration Mark" : "Not a Registration Mark");

}

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

CoreUtilities Class
CoreUtilities Members
Detecting Registration Marks
Leadtools.ImageProcessing.Effects.CombineCommand
Leadtools.ImageProcessing.RotateCommand
Leadtools.ImageProcessing.SizeCommand
Leadtools.ImageProcessing.ResizeCommand
GetTransformationParameters Method
SearchRegistrationMarksCommand Class
GetRegistrationMarksCenterMass Method