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

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);

  

See Also

◼fastNlMeansDenoisingColored

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