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HistogramEqualizeActivity Class
See Also  Members  
Leadtools.Workflow.ImageProcessing Namespace : HistogramEqualizeActivity Class



Linearizes the number of pixels in an image based on the specified color space. This can be used to bring out the detail in dark areas of an image. This activity is useful for pre-processing images for the purpose of improving barcode recognition results.

Syntax

Visual Basic (Declaration) 
Public Class HistogramEqualizeActivity 
   Inherits ImageProcessingBaseActivity
Visual Basic (Usage)Copy Code
Dim instance As HistogramEqualizeActivity
C# 
public class HistogramEqualizeActivity : ImageProcessingBaseActivity 
C++/CLI 
public ref class HistogramEqualizeActivity : public ImageProcessingBaseActivity 

Remarks

  • Previously this class only equalized the number of pixels per gray level, using a gray level representation of the image. This functionality is now obtained by passing HistogramEqualizeType.Gray for the Type property.
  • For the best results, set Type to HistogramEqualizeType.Yuv
  • This class can process the whole image or a region of the image.
  • This class 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 command does not support 32-bit grayscale images.
For more information, refer to Changing Brightness and Contrast.

Inheritance Hierarchy

System.Object
   System.Workflow.ComponentModel.DependencyObject
      System.Workflow.ComponentModel.Activity
         Leadtools.Workflow.Raster.WorkflowImageActivity
            Leadtools.Workflow.Raster.DisposableImageActivity
               Leadtools.Workflow.ImageProcessing.ImageProcessingBaseActivity
                  Leadtools.Workflow.ImageProcessing.HistogramEqualizeActivity

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

Leadtools.Workflow.ImageProcessing requires a Document or Medical toolkit license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features