AForge.Imaging.RecursiveBlobCounter.LabelColorPixel C# (CSharp) Method

        private unsafe void LabelColorPixel( byte* pixel, int labelPointer )
        {
            if ( ( tempLabels[labelPointer] == 0 ) && (
                ( pixel[RGB.R] > backgroundThresholdR ) ||
                ( pixel[RGB.G] > backgroundThresholdG ) ||
                ( pixel[RGB.B] > backgroundThresholdB ) ) )
            {
                tempLabels[labelPointer] = objectsCount;

                LabelColorPixel( pixel + pixelSize, labelPointer + 1 );                              // x + 1, y
                LabelColorPixel( pixel + pixelSize + stride, labelPointer + 1 + 2 + imageWidth );    // x + 1, y + 1
                LabelColorPixel( pixel + stride, labelPointer + 2 + imageWidth );                    // x    , y + 1
                LabelColorPixel( pixel - pixelSize + stride, labelPointer - 1 + 2 + imageWidth );    // x - 1, y + 1
                LabelColorPixel( pixel - pixelSize, labelPointer - 1 );                              // x - 1, y
                LabelColorPixel( pixel - pixelSize - stride, labelPointer - 1 - 2 - imageWidth );    // x - 1, y - 1
                LabelColorPixel( pixel - stride, labelPointer - 2 - imageWidth );                    // x    , y - 1
                LabelColorPixel( pixel + pixelSize - stride, labelPointer + 1 - 2 - imageWidth );    // x + 1, y - 1
            }
        }
    }