Accord.Imaging.RecursiveBlobCounter.LabelPixel C# (CSharp) Method

        private unsafe void LabelPixel(byte* pixel, int labelPointer)
        {
            if ((tempLabels[labelPointer] == 0) && (*pixel > backgroundThresholdG))
            {
                tempLabels[labelPointer] = ObjectsCount;

                LabelPixel(pixel + 1, labelPointer + 1);                              // x + 1, y
                LabelPixel(pixel + 1 + stride, labelPointer + 1 + 2 + ImageWidth);    // x + 1, y + 1
                LabelPixel(pixel + stride, labelPointer + 2 + ImageWidth);            // x    , y + 1
                LabelPixel(pixel - 1 + stride, labelPointer - 1 + 2 + ImageWidth);    // x - 1, y + 1
                LabelPixel(pixel - 1, labelPointer - 1);                              // x - 1, y
                LabelPixel(pixel - 1 - stride, labelPointer - 1 - 2 - ImageWidth);    // x - 1, y - 1
                LabelPixel(pixel - stride, labelPointer - 2 - ImageWidth);            // x    , y - 1
                LabelPixel(pixel + 1 - stride, labelPointer + 1 - 2 - ImageWidth);    // x + 1, y - 1
            }
        }