The HistogramEqualizeActivity Class is available in LEADTOOLS Document and Medical Imaging toolkits.
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 (Declaration) | |
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Public Class HistogramEqualizeActivity Inherits ImageProcessingBaseActivity Implements IComponent, IDisposable | |
| Visual Basic (Usage) |  Copy Code |
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Dim instance As HistogramEqualizeActivity | |
| C# | |
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public class HistogramEqualizeActivity : ImageProcessingBaseActivity, IComponent, IDisposable | |
| C++/CLI | |
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public ref class HistogramEqualizeActivity : public ImageProcessingBaseActivity, IComponent, 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.
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 3.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7