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.

Object Model

Syntax

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public class HistogramEqualizeActivity : ImageProcessingBaseActivity, System.ComponentModel.IComponent, System.IDisposable

'Declaration
 
Public Class HistogramEqualizeActivity 
   Inherits ImageProcessingBaseActivity
   Implements System.ComponentModel.IComponent, System.IDisposable

'Usage
 
Dim instance As HistogramEqualizeActivity

public sealed class HistogramEqualizeActivity : System.ComponentModel.IComponent, IClosable //In WinRT the IDisposable interface is replaced by IClosable

function Leadtools.Workflow.ImageProcessing.HistogramEqualizeActivity()

public ref class HistogramEqualizeActivity : public ImageProcessingBaseActivity, System.ComponentModel.IComponent, System.IDisposable

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.

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

HistogramEqualizeActivity Members
Leadtools.Workflow.ImageProcessing Namespace