TImageEnProc.SymmetricNearestNeighbour

Declaration

procedure SymmetricNearestNeighbour(Radius: Integer = 6);

Description

Apply a "Symmetric Nearest Neighbour" smoothing filter to the image.

SNN smoothing is very effective at noise reduction, while preserving edges.

Original image:

Applying SymmetricNearestNeighbour(6):

Note:
◼To remove noise from Monochrome images, use RemoveNoise
◼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 iermSmooth
◼If the image PixelFormat is not ie24RGB, it will be converted

Also see: Comparison of smoothing, blurring and noise reduction methods

Demo

Demos\ImageEditing\EveryMethod\EveryMethod.dpr

Example

// Load test image
ImageEnView1.IO.LoadFromFile( 'D:\TestImage.jpg' );

// Apply a "Symmetric Nearest Neighbour" smoothing filter to the image
ImageEnView1.Proc.SymmetricNearestNeighbour();

// Less aggressive SNN smoothing
ImageEnView1.Proc.SymmetricNearestNeighbour(2);

TImageEnProc.SymmetricNearestNeighbour