Accord.Imaging.Filters.BilateralSmoothing.ProcessFilter C# (CSharp) Method

        protected override unsafe void ProcessFilter(UnmanagedImage sourceData, UnmanagedImage destinationData, Rectangle rect)
        {
            int kernelHalf = kernelSize / 2;

            InitFilter();

            if ((rect.Width <= kernelSize) || (rect.Height <= kernelSize))
            {
                ProcessWithEdgeChecks(sourceData, destinationData, rect);
            }
            else
            {
                Rectangle safeArea = rect;
                safeArea.Inflate(-kernelHalf, -kernelHalf);

                if ((Environment.ProcessorCount > 1) && (enableParallelProcessing))
                {
                    ProcessWithoutChecksParallel(sourceData, destinationData, safeArea);
                }
                else
                {
                    ProcessWithoutChecks(sourceData, destinationData, safeArea);
                }

                // top
                ProcessWithEdgeChecks(sourceData, destinationData,
                    new Rectangle(rect.Left, rect.Top, rect.Width, kernelHalf));
                // bottom
                ProcessWithEdgeChecks(sourceData, destinationData,
                    new Rectangle(rect.Left, rect.Bottom - kernelHalf, rect.Width, kernelHalf));
                // left
                ProcessWithEdgeChecks(sourceData, destinationData,
                    new Rectangle(rect.Left, rect.Top + kernelHalf, kernelHalf, rect.Height - kernelHalf * 2));
                // right
                ProcessWithEdgeChecks(sourceData, destinationData,
                    new Rectangle(rect.Right - kernelHalf, rect.Top + kernelHalf, kernelHalf, rect.Height - kernelHalf * 2));
            }
        }