| EdgeDetectionEffect Class |
[NoComposition]
Filters out the content of an image leaving lines at the edges of contrasting sections.
Inheritance HierarchyNamespace: Microsoft.Graphics.Canvas.Effects
Assembly: Microsoft.Graphics.Canvas (in Microsoft.Graphics.Canvas.dll) Version: 0.0.0.0
SyntaxC#
public sealed class EdgeDetectionEffect : ICanvasEffect, IGraphicsEffect, IGraphicsEffectSource, ICanvasImage, IDisposable
The EdgeDetectionEffect type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | EdgeDetectionEffect | Initializes a new instance of the EdgeDetectionEffect class. |
Properties| Name | Description | |
|---|---|---|
 | AlphaMode | Specifies the treatment of alpha. Default value Premultiplied. |
| Amount | Adjusts the sensitivity of the edge detection filter.
Default value 0.5, range 0 to 1. |
| BlurAmount | Specifies the amount of blur to apply before edge detection.
Blur is used to remove high frequencies and reduce phantom edges.
Default value 0, range 0 to 10. |
| BufferPrecision | Specifies what precision to use for intermediate buffers when drawing this effect. |
| CacheOutput | Enables caching the output from drawing this effect. |
| Mode | Specifies what type of filter kernel to use for edge detection.
Default value Sobel. |
| Name | Attaches a user-defined name string to the effect. |
| OverlayEdges | If false, the output image is fully opaque.
If true, input opacity is preserved.
Default value false. |
| Source | Gets or sets the input source for EdgeDetection effect. |
Methods| Name | Description | |
|---|---|---|
| Dispose | Releases all resources used by the effect. |
| GetBounds(ICanvasResourceCreator) | Retrieves the bounds of this EdgeDetectionEffect. |
| GetBounds(ICanvasResourceCreator, Matrix3x2) | Retrieves the bounds of this EdgeDetectionEffect. |
| GetInvalidRectangles | Queries what regions of the effect output have changed since it was last drawn. |
 | GetRequiredSourceRectangle | Queries what part of an effect source image is needed to draw an output region. |
| GetRequiredSourceRectangles | Queries what parts of the effect source images are needed to draw an output region. |
| InvalidateSourceRectangle | Notifies the effect that one of its source images has changed. |
RemarksSupported by Win2D but not Windows.UI.Composition.
This Windows Runtime type corresponds to the D2D Edge detection effect.
See Also