Class UnsharpMaskEffectAttribute

The UnsharpMaskEffect sharpens an image by first creating a blurred version of the image. For each pixel in the image, the difference between the original pixel value and the blurred pixel value is determined. If the difference in pixel values exceeds a threshold value, the original pixel value is modified, sharpening the image.

Inheritance
System.Object
EffectAttribute
UnsharpMaskEffectAttribute
Inherited Members
Namespace: ImageVault.Client.Descriptors.Effects
Assembly: ImageVault.Client.dll
Syntax
public sealed class UnsharpMaskEffectAttribute : EffectAttribute

Constructors

UnsharpMaskEffectAttribute(Double, Int32, Int32, Int32)

Initializes a new instance of the UnsharpMaskEffectAttribute class.

Declaration
public UnsharpMaskEffectAttribute(double radius, int amount, int threshold, int sortOrder = 1)
Parameters
Type Name Description
System.Double radius Radius
System.Int32 amount Amount
System.Int32 threshold Threshold
System.Int32 sortOrder

The order in which to apply the effect

UnsharpMaskEffectAttribute(Int32)

Initializes a new instance of the UnsharpMaskEffectAttribute class.

Declaration
public UnsharpMaskEffectAttribute(int sortOrder = 1)
Parameters
Type Name Description
System.Int32 sortOrder
Remarks

Defaults to Radius 1 pixel, Amount 100 % and Threshold 5 levels

Properties

Amount

Defines the amount of sharpening to apply in pixels.

Declaration
public int Amount { get; set; }
Property Value
Type Description
System.Int32
Remarks

This is like a volume adjustment – the higher the percentage, the stronger the sharpening effect.

Typical setting: 50-200 %

Good starting point: 100 %

Radius

Defines the width of the sharpening effect in pixels

Declaration
public double Radius { get; set; }
Property Value
Type Description
System.Double
Remarks

Sharpening works on the edges of a subject by increasing the contrast at these points, making these outlines stand out more prominently. The higher the Radius amount, the stronger the sharpening effect. It’s measured in pixels, as this is the width of the sharpening effect.

Typical setting: 1-8 pixels

Good starting point: 1 pixel

Threshold

Defines the threshold level of the sharpening effect.

Declaration
public int Threshold { get; set; }
Property Value
Type Description
System.Int32
Remarks

The higher the threshold amount is set, the lower the sharpening effect. This value defines what counts as an edge for the sharpening applied by the Amount and Radius values. At '0 levels' each pixel counts as an edge, so it is sharpened. At high values (25 levels and above, for example) only high-contrast edges are sharpened.

Typical setting: 1-15 levels

Good starting point: 5 levels

Methods

CreateEffect()

Create the effect

Declaration
public override Effect CreateEffect()
Returns
Type Description
Effect
Overrides

Extension Methods