PredefinedSpatialActivity Class

Imposes a predefined spatial filter on an image. This activity is available in the Document/Medical Toolkits.

Object Model

Syntax

Visual Basic
C#
Objective-C
Java
C++

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

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

'Usage
 
Dim instance As PredefinedSpatialActivity

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

Remarks

A spatial filter recomputes the brightness of each pixel in an image by using a weighted averaging technique that considers the surrounding pixels. Spatial filters are used for operations such as sharpening an image or detecting edges within the image.
The SpatialFilterCommand works best with 24-bit, 16-bit, or grayscale images. If the image uses a color palette, this activity matches the new brightness value of each pixel to the nearest color in the existing palette.
This activity 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.
It is beyond the scope of this documentation to explain how applying various weighting factors affects an image. If you specify your own filter, you should refer to a textbook on image processing. For example, Digital Image Processing: Principles and Applications, by Gregory A. Baxes.
This activity does not support 32-bit grayscale images.

For more information, refer to Detecting and Enhancing Edges and Lines.
For more information, refer to List of Spatial Filters.

Requirements

Target Platforms

Reference

PredefinedSpatialActivity Members
Leadtools.Workflow.ImageProcessing Namespace