Accord.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;
                }
            }
        }
    }