Public Function IsVisible( _
   ByVal point As LeadPoint _
) As Boolean

Dim instance As RasterRegion
Dim point As LeadPoint
Dim value As Boolean
 
value = instance.IsVisible(point)

public bool IsVisible( 
   LeadPoint point
)

public:
bool IsVisible( 
   LeadPoint point
) 

Public Sub RasterRegionIsVisibleExample()
      Dim codecs As New RasterCodecs()

      Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")
      Dim destFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_IsVisibleRegion.bmp")

      ' Load the source image
      Using image As RasterImage = codecs.Load(srcFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1)
         ' Add a small elliptical region
         image.AddEllipseToRegion(Nothing, New LeadRect(image.ImageWidth \ 3, image.ImageHeight \ 3, image.ImageWidth \ 3, image.ImageHeight \ 3), RasterRegionCombineMode.Set)

         ' Get the region
         Using region As RasterRegion = image.GetRegion(Nothing)
            ' Remove the region from the image
            image.MakeRegionEmpty()

            ' Loop the image pixels, if it is inside the region, switch
            ' the red and blue component of the pixel color
            For y As Integer = 0 To image.Height - 1
               For x As Integer = 0 To image.Width - 1
                  ' Check if this pixel is inside the region
                  If (region.IsVisible(New LeadPoint(x, y))) Then
                     ' Yes, flip its R and B component
                     Dim color As RasterColor = image.GetPixelColor(y, x)
                     color = New RasterColor(color.B, color.G, color.R)
                     image.SetPixelColor(y, x, color)
                  End If
               Next
            Next
         End Using

         codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24)
      End Using

      codecs.Dispose()
   End Sub

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

public void RasterRegionIsVisibleExample()
   {
      RasterCodecs codecs = new RasterCodecs();

      string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
      string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_IsVisibleRegion.bmp");

      // Load the source image
      using(RasterImage image = codecs.Load(srcFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1))
      {
         // Add a small elliptical region
         image.AddEllipseToRegion(null, new LeadRect(image.ImageWidth / 3, image.ImageHeight / 3, image.ImageWidth / 3, image.ImageHeight / 3), RasterRegionCombineMode.Set);

         // Get the region
         using(RasterRegion region = image.GetRegion(null))
         {
            // Remove the region from the image
            image.MakeRegionEmpty();

            // Loop the image pixels, if it is inside the region, switch
            // the red and blue component of the pixel color
            for(int y = 0; y < image.Height; y++)
            {
               for(int x = 0; x < image.Width; x++)
               {
                  // Check if this pixel is inside the region
                  if(region.IsVisible(new LeadPoint(x, y)))
                  {
                     // Yes, flip its R and B component
                     RasterColor color = image.GetPixelColor(y, x);
                     color = new RasterColor(color.B, color.G, color.R);
                     image.SetPixelColor(y, x, color);
                  }
               }
            }
         }

         codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24);
      }

      codecs.Dispose();
   }

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