- About Graphics Mill
- What's New?
- Breaking Changes in Graphics Mill 12
- Breaking Changes in Graphics Mill 11
- Features
- Supported File Formats
- System Requirements
- Getting Started
- Working with Image Formats
- Transforming Images (Resize, Rotate, Crop)
- Working with Metadata
- Color Management and Color Reduction
- Drawing Text and Graphics
- Color Keying (Green Screen Removal)
- Channels and Pixel Data
- Color and Tone Correction
- Working with Photoshop (PSD) Files
- Image Filters
- Processing Large Images
- Basics of Image Processing
- Troubleshooting
- Class Library Reference
- Aurigma.GraphicsMill Namespace
- Aurigma.GraphicsMill.Codecs Namespace
- Aurigma.GraphicsMill.Codecs.ClippingPath Namespace
- Aurigma.GraphicsMill.Codecs.Psd Namespace
- Aurigma.GraphicsMill.Drawing Namespace
- Aurigma.GraphicsMill.Drawing.Art Namespace
- Aurigma.GraphicsMill.Drawing.Effects Namespace
- Aurigma.GraphicsMill.Licensing Namespace
- Aurigma.GraphicsMill.Templates Namespace
- Aurigma.GraphicsMill.Transforms Namespace
- AddNoise Class
- AdjustHsl Class
- AutoCrop Class
- BezierTransform Class
- Blender Class
- BlenderOnInitEventArgs Class
- BlendMode Enumeration
- Blur Class
- Brightness Class
- BrightnessContrast Class
- ChannelBalance Class
- CnvTransform Class
- ColorConverter Class
- ColorManagementEngine Enumeration
- ColorOverlay Class
- ColorQuantizationAlgorithm Enumeration
- ColorTransformationIntent Enumeration
- CombineMode Enumeration
- Combiner Class
- CombinerOnInitEventArgs Class
- Contrast Class
- Crop Class
- Cylindrize Class
- Desaturate Class
- DistributionKind Enumeration
- DitheringType Enumeration
- EdgeDetect Class
- EdgeDetectMode Enumeration
- Emboss Class
- FadeType Enumeration
- Flip Class
- FlipType Enumeration
- FloodFill Class
- FloodFillMode Enumeration
- GreenScreenRemoval Class
- HistogramEqualize Class
- IBitmapTransform Interface
- ImageTransmitter Class
- InterpolationMode Enumeration
- Invert Class
- Levels Class
- Lut Class
- LutInterpolationMode Enumeration
- LutTransform Class
- MaskTransform Class
- Matrix Class
- MatrixTransform Class
- Maximum Class
- Median Class
- Minimum Class
- Mosaic Class
- RemoveAlpha Class
- Resize Class
- ResizeInterpolationMode Enumeration
- ResizeMode Enumeration
- ResolutionModifier Class
- Rotate Class
- ScaleAlpha Class
- SetAlpha Class
- Shadow Class
- Sharpen Class
- SmartBlur Class
- Solarize Class
- Spray Class
- StackBlur Class
- Texturize Class
- Transform Class
- Transparentize Class
- UnsharpMask Class
- Licensing
- End User License Agreement
- Copyright Notices
UnsharpMask Class
Increases a sharpness of an image by using the unsharp mask technique.
Namespace:
Aurigma.GraphicsMill.Transforms
Assembly:
Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)
Syntax
public sealed class UnsharpMask : MaskTransformRemarks
Unsharp mask is a wide-spread technique used by photographers to increase image sharpness even in precomputer times. The idea is to combine the image with the unfocused (blurred) version. This class provides the Radius property to tune the blur effect. During combining the algorithm calculates the difference between corresponding pixels of original and blurred image. If this difference is greater than value specified with Threshold property, algorithm adds this N percents of this difference to original pixel (N is set by Amount property). Otherwise no changes to original pixel is done. As blurred image differs from original ones mainly on the object edges, sharpening effect is achieved.
Using this technique is quite difficult to untrained user as it requires three non-intuitive parameters (amount, radius, and threshold). That's why if you want to provide user easy way to manipulate image sharpness, you can use Sharpen transform which is less flexible, but much more easy-to-use.