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

Visual Basic (Usage)	Copy Code
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
)

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 only accepts 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 only accepts positive values.

width

The width of the registration mark (in pixels). This parameter only accepts positive values.

height

The height of the registration mark (in pixels). This parameter only accepts positive values.

Return Value

This example determines if the object is a registration mark.

Visual Basic

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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

C#

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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"; }

SilverlightCSharp	Copy Code

SilverlightVB	Copy Code

• 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.

Target Platforms: Silverlight 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)

Reference