Overridable Function CreateThumbnail( _
   ByVal thumbnailWidth As Integer, _
   ByVal thumbnailHeight As Integer _
) As RasterImage

Visual Basic (Usage)	Copy Code
Dim instance As IOcrPage Dim thumbnailWidth As Integer Dim thumbnailHeight As Integer Dim value As RasterImage   value = instance.CreateThumbnail(thumbnailWidth, thumbnailHeight)

virtual RasterImage CreateThumbnail( 
   int thumbnailWidth,
   int thumbnailHeight
)

virtual RasterImage CreateThumbnail( 
   int thumbnailWidth,
   int thumbnailHeight
) 

Parameters

thumbnailWidth

The desired maximum width of the thumbnail image in pixels.

thumbnailHeight

The desired maximum height of the thumbnail image in pixels.

Return Value

The thumbnail image returned from this image always contain the correct aspect ratio. The width and height of the thumbnail is guaranteed to be at least thumbnailWidth by thumbnailHeight in size but never exceeding that. The only time you get a thumbnail that is exactly thumbnailWidth by thumbnailHeight pixels is when this IOcrPage is a perfect square.

The thumbnail image returned from this method will always contain 24 bits per pixel for best possible quality.

One use of the thumbnail image of a page is if your application is a Windows Forms-based application containing the RasterImageList control. You can use CreateThumbnail to obtain thumbnails of the pages in the engine and use them as items to the RasterImageList. For an example, refer to the C# or VB.NET Main OCR Demo that ships with LEADTOOLS.

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

Reference