Initial commit

Ex.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Windows;
+using System.Windows.Media.Imaging;
+
+namespace DSPS_Lab3;
+
+public static class Ex
+{
+    public static float[,] GenerateSpatialKernel(int size, float sigma)
+    {
+        var kernel = new float[size, size];
+        float sum = 0;
+        var half = size / 2;
+
+        // Use <= half to ensure the full kernel is covered
+        for (var y = -half; y <= half; y++)
+        {
+            for (var x = -half; x <= half; x++)
+            {
+                // Optional: Bounds check for odd/even sizes
+                if (y + half >= size || x + half >= size) continue;
+
+                var val = (float)Math.Exp(-(x * x + y * y) / (2 * sigma * sigma));
+                kernel[y + half, x + half] = val;
+                sum += val;
+            }
+        }
+
+        for (var y = 0; y < size; y++)
+            for (var x = 0; x < size; x++)
+                kernel[y, x] /= sum;
+
+        return kernel;
+    }
+
+    public static float[,] PadAndShiftKernel(float[,] smallKernel, int imgWidth, int imgHeight)
+    {
+        var fullKernel = new float[imgHeight, imgWidth];
+        int kHeight = smallKernel.GetLength(0);
+        int kWidth = smallKernel.GetLength(1);
+        int radY = kHeight / 2;
+        int radX = kWidth / 2;
+
+        for (int y = 0; y < kHeight; y++)
+        {
+            for (int x = 0; x < kWidth; x++)
+            {
+                // Circular shift: maps kernel center to (0,0)
+                int targetY = (y - radY + imgHeight) % imgHeight;
+                int targetX = (x - radX + imgWidth) % imgWidth;
+                fullKernel[targetY, targetX] = smallKernel[y, x];
+            }
+        }
+        return fullKernel;
+    }
+}