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

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

            InitFilter( );

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

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

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