The RotateActivity Class is available in LEADTOOLS Document and Medical Imaging toolkits.
Rotates an image by the specified number of degrees.
Object Model
Syntax
| Visual Basic (Declaration) | |
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Public Class RotateActivity Inherits ImageProcessingBaseActivity Implements IComponent, IDisposable | |
| Visual Basic (Usage) |  Copy Code |
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Dim instance As RotateActivity | |
| C# | |
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public class RotateActivity : ImageProcessingBaseActivity, IComponent, IDisposable | |
| C++/CLI | |
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public ref class RotateActivity : public ImageProcessingBaseActivity, IComponent, IDisposable | |
Remarks
This activity has the following features:
- It uses the center of the image as the center of rotation.
- It can rotate the image clockwise or counterclockwise up to 360 degrees in 100th-degree increments.
- It can resize the image to accommodate the rotated height and width, or it can retain the original height and width, cropping the image as necessary.
- It uses FillColor as the background color to fill any new area created by the rotation.
RotateCommandFlags.Resample and RotateCommandFlags.Bicubic can be combined with RotateCommandFlags.Resize, but they can not be combined with each other.
If RotateCommandFlags.Resize is set, then the image is resized. Otherwise, the image is cropped.
Interpolation can be done while rotating certain images. This produces superior output, eliminating the jaggedness occurring when rotating images at angles that are not multiples of 90. (ie when RotateActivity.Angle is not a multiple of 9000).
The only images that are interpolated are:
- 8-bit grayscale images (for best results, all gray values should be in the image palette).
- 12-bit and 16-bit grayscale images that do not have a palette.
- 16-bit color images
- 24-bit, 32-bit, 48-bit and 64-bit color images
For all other images, RotateActivity ignores the resampling flags and the rotation is performed without interpolation.
For more information, refer to Processing an Image.
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.RotateActivity
Requirements
Target Platforms: Microsoft .NET Framework 3.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7