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OverlayCount Property

Summary
Gets the number of overlays that have been defined for this RasterImage.
Syntax
C#
Objective-C
C++/CLI
Java
Python
public int OverlayCount { get; } 
@property (nonatomic, assign, readonly) NSUInteger overlayCount 
public int getOverlayCount(); 
public: 
property int OverlayCount { 
   int get(); 
} 
OverlayCount # get  (RasterImage) 

Property Value

The number of overlays that have been defined for this RasterImage.

Remarks

This method is available in the (Document/Medical only) Toolkits.

This method will count how many overlays have been defined. The overlays are defined by calling SetOverlayImage or UpdateOverlayAttributes.

For more information, refer to Overlay Overview.

Example
C#
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Dicom; 
using Leadtools.Drawing; 
using Leadtools.Controls; 
using Leadtools.Svg; 
 
 
public void GetOverlayImageExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
   // load an image and set an overlay 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "DICOM", "image2.dcm"), 0, CodecsLoadByteOrder.BgrOrGray, 1, 1); 
   RasterImage imageOverlay1 = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ulay1.bmp"), 1, CodecsLoadByteOrder.Rgb, 1, 1); 
   RasterImage imageOverlay2 = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ulay1.bmp"), 1, CodecsLoadByteOrder.Rgb, 1, 1); 
   image.SetOverlayImage(0, imageOverlay1, RasterGetSetOverlayImageMode.Copy); 
   image.SetOverlayImage(1, imageOverlay2, RasterGetSetOverlayImageMode.Copy); 
 
   // update the attributes of one of the overlays 
   RasterOverlayAttributes attributes = image.GetOverlayAttributes(0, 
      RasterGetSetOverlayAttributesFlags.Color | 
      RasterGetSetOverlayAttributesFlags.Flags | 
      RasterGetSetOverlayAttributesFlags.Origin | 
      RasterGetSetOverlayAttributesFlags.BitIndex); 
 
   attributes.Color = new RasterColor(255, 255, 255); 
   attributes.AutoPaint = true; 
   attributes.AutoProcess = true; 
   attributes.Origin = new LeadPoint(5, 5); 
   attributes.BitPosition = image.BitsPerPixel - 1; 
 
   image.UpdateOverlayAttributes( 
      0, 
      attributes, 
      RasterGetSetOverlayAttributesFlags.Color | 
      RasterGetSetOverlayAttributesFlags.Flags | 
      RasterGetSetOverlayAttributesFlags.Origin | 
      RasterGetSetOverlayAttributesFlags.BitIndex); 
 
 
   int count = image.OverlayCount; 
   for (int i = 0; i < count; i++) 
   { 
      using (RasterImage overlayTest = image.GetOverlayImage(i, RasterGetSetOverlayImageMode.NoCopy)) 
      { 
         string fileName = string.Format(Path.Combine(LEAD_VARS.ImagesDir, "overlay{0}_copy.bmp"), i); 
         codecs.Save(overlayTest, fileName, RasterImageFormat.Bmp, 1); 
      } 
   } 
 
   image.Dispose(); 
   imageOverlay1.Dispose(); 
   imageOverlay2.Dispose(); 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
} 
Requirements

Target Platforms

Help Version 23.0.2024.5.22
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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.