The HalftoneActivity Class is available in LEADTOOLS Document and Medical Imaging toolkits.
Converts a 1-, 4-, 8-, 16-, 24-, or 32-bit image to a halftoned image, with a specified pattern of rotation. A halftoned image is a 1-bit image that has been dithered for black and white printing or display.
Object Model
Syntax
| Visual Basic (Declaration) | |
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Public Class HalftoneActivity Inherits ImageProcessingBaseActivity Implements IComponent, IDisposable | |
| Visual Basic (Usage) |  Copy Code |
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Dim instance As HalftoneActivity | |
| C# | |
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public class HalftoneActivity : ImageProcessingBaseActivity, IComponent, IDisposable | |
| C++/CLI | |
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public ref class HalftoneActivity : public ImageProcessingBaseActivity, IComponent, IDisposable | |
Remarks
- For the HalfToneCommandType.UserDefined option, the number of images in the list must be at least equal to (Dimension * Dimension + 1). Images with higher indexes correspond to higher intensity values.
- This command can process the whole image or a region of the image.
- This command does not support 12 and 16-bit grayscale and 48 and 64-bit color images.
- This command does not support signed data images.
- This command supports 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.HalftoneActivity
Requirements
Target Platforms: Microsoft .NET Framework 3.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7