Calculate difference between two images and threshold it.

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

Syntax

C#
public class ThresholdedDifference : BaseFilter2

Remarks

The filter produces similar result as applying Difference filter and then Threshold filter – thresholded difference between two images. Result of this image processing routine may be useful in motion detection applications or finding areas of significant difference.

The filter accepts 8 and 24/32color images for processing. In the case of color images, the image processing routine differences sum over 3 RGB channels (Manhattan distance), i.e. |diffR| + |diffG| + |diffB|.

Sample usage:

CopyC#
// create filter
ThresholdedDifference filter = new ThresholdedDifference( 60 );
// apply the filter
filter.OverlayImage = backgroundImage;
Bitmap resultImage = filter.Apply( sourceImage );

Source image:

Background image:

Result image:

Inheritance Hierarchy

System..::.Object
  AForge.Imaging.Filters..::.BaseFilter
    AForge.Imaging.Filters..::.BaseFilter2
      AForge.Imaging.Filters..::.ThresholdedDifference

See Also