diff --git a/.idea/ImgJava.iml b/.idea/ImgJava.iml
index d6ebd48..28f496d 100644
--- a/.idea/ImgJava.iml
+++ b/.idea/ImgJava.iml
@@ -1,8 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<module type="JAVA_MODULE" version="4">
+<module external.linked.project.id="ImgJava" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$" external.system.id="GRADLE" external.system.module.group="io.gitlab.jfronny" external.system.module.version="1.0" type="JAVA_MODULE" version="4">
   <component name="NewModuleRootManager" inherit-compiler-output="true">
     <exclude-output />
-    <content url="file://$MODULE_DIR$" />
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/.gradle" />
+      <excludeFolder url="file://$MODULE_DIR$/build" />
+    </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 8fcbe9d..1c80b4e 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="FrameworkDetectionExcludesConfiguration">
+    <file type="web" url="file://$PROJECT_DIR$" />
+  </component>
   <component name="ProjectRootManager" version="2" languageLevel="JDK_16" default="true" project-jdk-name="16" project-jdk-type="JavaSDK" />
 </project>
\ No newline at end of file
diff --git a/run/moscov.png b/run/moscov.png
index ff9ddd7..29f3714 100644
Binary files a/run/moscov.png and b/run/moscov.png differ
diff --git a/src/main/java/io/gitlab/jfronny/ImgJava/Main.java b/src/main/java/io/gitlab/jfronny/ImgJava/Main.java
index 9097878..a03b5dd 100644
--- a/src/main/java/io/gitlab/jfronny/ImgJava/Main.java
+++ b/src/main/java/io/gitlab/jfronny/ImgJava/Main.java
@@ -25,7 +25,7 @@ public class Main {
             pict = stackViewer.push(ImageUtil.rotate(pict, ImageUtil.RotateMode.Right));
             pict = stackViewer.push(ImageUtil.mirror(pict, ImageUtil.MirrorMode.Vertical));
             //pict = stackViewer.push(ImageUtil.blurBox(pict, 10));
-            pict = stackViewer.push(ImageUtil.blurGauss(pict, 3));
+            pict = stackViewer.push(ImageUtil.blurGauss(pict, 3, 2));
             pict = stackViewer.push(ImageUtil.sharpen(pict, 3));
             pict.save(run.resolve("moscov.png"));
             stackViewer.repaint();
diff --git a/src/main/java/io/gitlab/jfronny/ImgJava/imageProcessing/ImageUtil.java b/src/main/java/io/gitlab/jfronny/ImgJava/imageProcessing/ImageUtil.java
index f235ddd..d669c7a 100644
--- a/src/main/java/io/gitlab/jfronny/ImgJava/imageProcessing/ImageUtil.java
+++ b/src/main/java/io/gitlab/jfronny/ImgJava/imageProcessing/ImageUtil.java
@@ -77,78 +77,25 @@ public class ImageUtil {
 
 
     public static Picture blurBox(Picture picture, int amount) {
-        int w = picture.getWidth();
-        int h = picture.getHeight();
-
-        Color[][] pixel;
-        Color[][] pixelNeu = picture.getPixelArray();
-
-        for (int i = 0; i < amount; i++) {
-            pixel = pixelNeu;
-            pixelNeu = new Color[w][h];
-            for (int x = 0; x < w; x++) {
-                for (int y = 0; y < h; y++) {
-                    if (x < 1 || y < 1 || x + 1 >= w || y + 1 >= h) {
-                        pixelNeu[x][y] = pixel[x][y];
-                        continue;
-                    }
-                    pixelNeu[x][y] = pixel[x][y];
-                    //p p p
-                    //p 0 p
-                    //p p p
-                    MColor sum = new MColor(pixel[x - 1][y + 1])
-                            .add(pixel[x + 0][y + 1])
-                            .add(pixel[x + 1][y + 1])
-                            .add(pixel[x - 1][y + 0])
-                            .add(pixel[x + 0][y + 0])
-                            .add(pixel[x + 1][y + 0])
-                            .add(pixel[x - 1][y - 1])
-                            .add(pixel[x + 0][y - 1])
-                            .add(pixel[x + 1][y - 1]);
-
-                    pixelNeu[x][y] = sum.div(9).get();
-                }
-            }
-        }
-
-        picture.setPixelArray(pixelNeu);
-        return picture;
+        return applyMatrix(picture, new double[][]{
+                new double[] {1, 1, 1},
+                new double[] {1, 1, 1},
+                new double[] {1, 1, 1}
+        }, amount);
     }
 
-    public static Picture blurGauss(Picture picture, int radius) {
-        int w = picture.getWidth();
-        int h = picture.getHeight();
-
-        Color[][] pixel = picture.getPixelArray();
-        Color[][] pixelNeu = new Color[w][h];
-
+    public static Picture blurGauss(Picture picture, int radius, int amount) {
         double sigma = radius / 2d;
-
-        for (int x = 0; x < w; x++) {
-            for (int y = 0; y < h; y++) {
-
-                pixelNeu[x][y] = pixel[x][y];
-
-                MColor sum = new MColor();
-
-                double gSum = 0;
-
-                for (int dx = -radius; dx <= radius; dx++) {
-                    for (int dy = -radius; dy <= radius; dy++) {
-                        if (x + dx >= 0 && y + dy >= 0 && x + dx < w && y + dy < h) {
-                            double g = gauss(dx, dy, sigma);
-                            gSum += g;
-                            sum.addM(pixel[x + dx][y + dy], g);
-                        }
-                    }
-                }
-
-                pixelNeu[x][y] = sum.div(gSum).get();
+        int bl = radius * 2 + 1;
+        double[][] matrix = new double[bl][bl];
+        
+        for (int x = 0; x < bl; x++) {
+            for (int y = 0; y < bl; y++) {
+                matrix[x][y] = gauss(x - radius, y - radius, sigma);
             }
         }
 
-        picture.setPixelArray(pixelNeu);
-        return picture;
+        return applyMatrix(picture, matrix, amount);
     }
 
     private static double gauss(double dX, double dY, double stDev) {
@@ -156,32 +103,52 @@ public class ImageUtil {
     }
 
     public static Picture sharpen(Picture picture, int amount) {
+        return applyMatrix(picture, new double[][]{
+                new double[] {0, -1, 0},
+                new double[] {-1, 5, -1},
+                new double[] {0, -1, 0}
+        }, amount);
+    }
+
+    public static Picture applyMatrix(Picture picture, double[][] matrix, int amount) {
         int w = picture.getWidth();
         int h = picture.getHeight();
 
+        int mW = matrix.length;
+        int mH = matrix[0].length;
+        if ((mW % 2 != 1) || (mH % 2 != 1))
+            throw new IndexOutOfBoundsException("matrix must not have round length");
+        
+        mW /= 2;
+        mH /= 2;
+
         Color[][] pixel;
         Color[][] pixelNeu = picture.getPixelArray();
-
+        
         for (int i = 0; i < amount; i++) {
             pixel = pixelNeu;
             pixelNeu = new Color[w][h];
+
             for (int x = 0; x < w; x++) {
                 for (int y = 0; y < h; y++) {
-                    if (x < 1 || y < 1 || x + 1 >= w || y + 1 >= h) {
-                        pixelNeu[x][y] = pixel[x][y];
-                        continue;
-                    }
-                    pixelNeu[x][y] = pixel[x][y];
-                    //p p p
-                    //p 0 p
-                    //p p p
-                    MColor sum = new MColor(pixel[x + 0][y + 1]).mult(-1)
-                            .addM(pixel[x - 1][y + 0], -1)
-                            .addM(pixel[x + 0][y + 0], 5)
-                            .addM(pixel[x + 1][y + 0], -1)
-                            .addM(pixel[x + 0][y - 1], -1);
 
-                    pixelNeu[x][y] = sum.get();
+                    pixelNeu[x][y] = pixel[x][y];
+
+                    MColor sum = new MColor();
+
+                    double gSum = 0;
+
+                    for (int dx = -mW; dx <= mW; dx++) {
+                        for (int dy = -mH; dy <= mH; dy++) {
+                            if (x + dx >= 0 && y + dy >= 0 && x + dx < w && y + dy < h) {
+                                double g = matrix[mW + dx][mH + dy];
+                                gSum += g;
+                                sum.addM(pixel[x + dx][y + dy], g);
+                            }
+                        }
+                    }
+
+                    pixelNeu[x][y] = sum.div(gSum).get();
                 }
             }
         }
diff --git a/src/main/java/io/gitlab/jfronny/ImgJava/util/MColor.java b/src/main/java/io/gitlab/jfronny/ImgJava/util/MColor.java
index bde8f77..6fd09dd 100644
--- a/src/main/java/io/gitlab/jfronny/ImgJava/util/MColor.java
+++ b/src/main/java/io/gitlab/jfronny/ImgJava/util/MColor.java
@@ -3,10 +3,10 @@ package io.gitlab.jfronny.ImgJava.util;
 import java.awt.*;
 
 public class MColor {
-    public int r;
-    public int g;
-    public int b;
-    public int a;
+    public double r;
+    public double g;
+    public double b;
+    public double a;
 
     public MColor(Color c) {
         this(c.getRed(), c.getGreen(), c.getBlue(), c.getAlpha());
@@ -24,7 +24,11 @@ public class MColor {
     }
 
     public Color get() {
-        return new Color(Math.max(r, 0), Math.max(g, 0), Math.max(b, 0), Math.max(a, 0));
+        return new Color(clamp(r), clamp(g), clamp(b), clamp(a));
+    }
+
+    private static int clamp(double d) {
+        return (int)Math.round(Math.max(Math.min(d, 255), 0));
     }
 
     public MColor add(Color c) {