Susan corners detector.

Namespace:  AForge.Imaging
Assembly:  AForge.Imaging (in AForge.Imaging.dll) Version: 2.2.5.0 (2.2.5.0)

Syntax

C#
public class SusanCornersDetector : ICornersDetector

Remarks

The class implements Susan corners detector, which is described by S.M. Smith in: S.M. Smith, “SUSAN – a new approach to low level image processing”, Internal Technical Report TR95SMS1, Defense Research Agency, Chobham Lane, Chertsey, Surrey, UK, 1995.

Note:Some implementation notes:
  • Analyzing each pixel and searching for its USAN area, the 7×7 mask is used, which is comprised of 37 pixels. The mask has circle shape:
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      xxx
 xxxxx
xxxxxxx
xxxxxxx
xxxxxxx
 xxxxx
  xxx
  • In the case if USAN’s center of mass has the same coordinates as nucleus (central point), the pixel is not a corner.
  • For noise suppression the 5×5 square window is used.

The class processes only grayscale 8 bpp and color 24/32 bpp images. In the case of color image, it is converted to grayscale internally using GrayscaleBT709 filter.

Sample usage:

CopyC#
// create corners detector's instance
SusanCornersDetector scd = new SusanCornersDetector( );
// process image searching for corners
List<IntPoint> corners = scd.ProcessImage( image );
// process points
foreach ( IntPoint corner in corners )
{
    // ... 
}

Inheritance Hierarchy

System..::.Object
  AForge.Imaging..::.SusanCornersDetector

See Also