AForge.Imaging.Filters.BlobsFiltering.ProcessFilter C# (CSharp) Method

        protected override unsafe void ProcessFilter( UnmanagedImage image )
        {
            // use blob counter to build objects map and filter them
            blobCounter.ProcessImage( image );
            int[] objectsMap = blobCounter.ObjectLabels;

            // get image width and height
            int width  = image.Width;
            int height = image.Height;

            // do the job
            byte* ptr = (byte*) image.ImageData.ToPointer( );

            if ( image.PixelFormat == PixelFormat.Format8bppIndexed )
            {
                int offset = image.Stride - width;

                for ( int y = 0, p = 0; y < height; y++ )
                {
                    for ( int x = 0; x < width; x++, ptr++, p++ )
                    {
                        if ( objectsMap[p] == 0 )
                        {
                            *ptr = 0;
                        }
                    }
                    ptr += offset;
                }
            }
            else
            {
                int pixelSize = Bitmap.GetPixelFormatSize( image.PixelFormat ) / 8;
                int offset = image.Stride - width * pixelSize;

                for ( int y = 0, p = 0; y < height; y++ )
                {
                    for ( int x = 0; x < width; x++, ptr += pixelSize, p++ )
                    {
                        if ( objectsMap[p] == 0 )
                        {
                            ptr[RGB.R] = ptr[RGB.G] = ptr[RGB.B] = 0;
                        }
                    }
                    ptr += offset;
                }
            }
        }
    }