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Controllers/Blur.cs

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+using ImageMagick;
+using Microsoft.AspNetCore.Mvc;
+
+namespace tcc_app.Controllers
+{
+    [ApiController]
+    [Route("")]
+    public class ImageController : ControllerBase
+    {
+        [HttpPost("blur")]
+        public async Task<IActionResult> BlurImage()
+        {
+            MemoryStream mstream = new MemoryStream();
+            await HttpContext.Request.Body.CopyToAsync(mstream);
+
+            var image = new MagickImage(new MemoryStream(mstream.ToArray()));
+            var blurredImage = new MagickImage(image);
+            var pixels = image.GetPixels();
+            var blurredPixels = blurredImage.GetPixelsUnsafe();
+
+            foreach (var pixel in pixels)
+            {
+                int x = pixel.X,
+                    y = pixel.Y;
+
+                long rTotal = 0, gTotal = 0, bTotal = 0;
+                int pixelCount = 0;
+                for (short offsetY = -5; offsetY <= 5; offsetY++)
+                {
+                    for (short offsetX = -5; offsetX <= 5; offsetX++)
+                    {
+                        int newX = x + offsetX;
+                        int newY = y + offsetY;
+
+                        if (newX >= 0 && newX < image.Width && newY >= 0 && newY < image.Height)
+                        {
+                            var pixelColor = pixels[newX, newY];
+                            rTotal += pixelColor.GetChannel(0);
+                            gTotal += pixelColor.GetChannel(1);
+                            bTotal += pixelColor.GetChannel(2);
+                            pixelCount++;
+                        }
+                    }
+                }
+
+                blurredPixels[x, y].SetChannel(0, Convert.ToUInt16(rTotal / pixelCount));
+                blurredPixels[x, y].SetChannel(1, Convert.ToUInt16(gTotal / pixelCount));
+                blurredPixels[x, y].SetChannel(2, Convert.ToUInt16(bTotal / pixelCount));
+            }
+
+            var blurredImageStream = new MemoryStream();
+            blurredImage.Write(blurredImageStream);
+            blurredImageStream.Position = 0;
+
+            return File(blurredImageStream, "image/png");
+        }
+
+    }
+}