TImageEnProc.UnsharpMask
Declaration
procedure UnsharpMask(Radius: Double = 4.0; Amount: Double = 1.0; Threshold: Double = 0.05);Description
Apply a gaussian blur to the image.Unlike Blur. UnsharpMask() only "blurs" the areas (pixels) which are sharper (decided by the threshold parameter).
| Parameter | Description |
|---|---|
| Radius | Radius of the gaussian blur matrix (> 1) |
| Amount | Difference between original and blurred image (0.0 to 5.0) |
| Threshold | Threshold of maximum luminosity to apply the effect (0.0 to 1.0) |
Also see: Comparison of smoothing, blurring and noise reduction methods
Note:
◼A UI for this is available to your users in the Image Processing dialog
◼Also available as a RetouchTool by setting MouseInteractGeneral to [miRetouchTool] and RetouchMode to iermUnsharpen
◼If the image PixelFormat is not ie24RGB, it will be converted
Demo
 | Demos\ImageEditing\EveryMethod\EveryMethod.dpr |
Example
// Load test imageImageEnView1.IO.LoadFromFile( 'D:\TestImage.jpg' );
// Apply a gaussian blur to the image
ImageEnView1.Proc.UnsharpMask();
