public class ExtractChannel : BaseFilter

Extracts specified channel of color image and returns it as grayscale image.

The filter accepts 24, 32, 48 and 64 bpp color images and produces 8 (if source is 24 or 32 bpp image) or 16 (if source is 48 or 64 bpp image) bpp grayscale image.

Sample usage:

CopyC#

// create filter
ExtractChannel filter = new ExtractChannel( RGB.G );
// apply the filter
Bitmap channelImage = filter.Apply( image );

Initial image:

Result image:

System..::.Object
  AForge.Imaging.Filters..::.BaseFilter
    AForge.Imaging.Filters..::.ExtractChannel