feat: add gaussian noise to image (#430)

Closes #381 

### Summary of Changes

Images can now be modified with "gaussian noise".

---------

Co-authored-by: megalinter-bot <129584137+megalinter-bot@users.noreply.github.com>
Co-authored-by: Lars Reimann <mail@larsreimann.com>

docs/tutorials/image_processing.ipynb

@@ -31,16 +31,16 @@
    "source": [
     "from safeds.data.image.containers import Image\n",
     "\n",
-    "boy = Image.from_png_file(\"data/boy.png\")\n",
-    "boy"
+    "plane = Image.from_png_file(\"data/plane.png\")\n",
+    "plane"
    ]
   },
   {
    "cell_type": "markdown",
    "source": [
     "## Process the image\n",
     "\n",
-    "1. Resize the `Image` to have the width 300 and height 250:"
+    "1. Resize the `Image` to have the width 284 and height 160:"
    ],
    "metadata": {
     "collapsed": false
@@ -52,7 +52,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "boy.resize(200,170)"
+    "plane.resize(284, 160)"
    ]
   },
   {
@@ -69,7 +69,7 @@
    "execution_count": null,
    "outputs": [],
    "source": [
-    "boy.convert_to_grayscale()\n"
+    "plane.convert_to_grayscale()\n"
    ],
    "metadata": {
     "collapsed": false
@@ -78,7 +78,7 @@
   {
    "cell_type": "markdown",
    "source": [
-    "3. Crop the `Image` to be 200x200 with the top-left corner being at (250, 130):"
+    "3. Crop the `Image` to be 200x200 with the top-left corner being at (255, 30):"
    ],
    "metadata": {
     "collapsed": false
@@ -89,7 +89,7 @@
    "execution_count": null,
    "outputs": [],
    "source": [
-    "boy.crop(250, 130, 200, 200)\n"
+    "plane.crop(x=255, y=30, width=200, height=200)\n"
    ],
    "metadata": {
     "collapsed": false
@@ -109,7 +109,7 @@
    "execution_count": null,
    "outputs": [],
    "source": [
-    "boy.flip_horizontally()\n"
+    "plane.flip_horizontally()\n"
    ],
    "metadata": {
     "collapsed": false
@@ -131,7 +131,7 @@
    "execution_count": null,
    "outputs": [],
    "source": [
-    "boy.adjust_brightness(1.5)\n"
+    "plane.adjust_brightness(1.5)\n"
    ],
    "metadata": {
     "collapsed": false
@@ -153,7 +153,7 @@
    "execution_count": null,
    "outputs": [],
    "source": [
-    "boy.adjust_contrast(1.5)\n"
+    "plane.adjust_contrast(1.5)\n"
    ],
    "metadata": {
     "collapsed": false
@@ -175,7 +175,7 @@
    "execution_count": null,
    "outputs": [],
    "source": [
-    "boy.adjust_color_balance(0.5)"
+    "plane.adjust_color_balance(0.5)"
    ],
    "metadata": {
     "collapsed": false
@@ -198,7 +198,7 @@
    "execution_count": null,
    "outputs": [],
    "source": [
-    "boy.blur(5)\n"
+    "plane.blur(5)\n"
    ],
    "metadata": {
     "collapsed": false
@@ -220,7 +220,7 @@
    "execution_count": null,
    "outputs": [],
    "source": [
-    "boy.sharpen(5)\n"
+    "plane.sharpen(5)\n"
    ],
    "metadata": {
     "collapsed": false
@@ -240,7 +240,7 @@
    "execution_count": null,
    "outputs": [],
    "source": [
-    "boy.invert_colors()\n"
+    "plane.invert_colors()\n"
    ],
    "metadata": {
     "collapsed": false
@@ -260,7 +260,7 @@
    "execution_count": null,
    "outputs": [],
    "source": [
-    "boy.rotate_right()\n"
+    "plane.rotate_right()\n"
    ],
    "metadata": {
     "collapsed": false
@@ -280,7 +280,27 @@
    "execution_count": null,
    "outputs": [],
    "source": [
-    "boy.find_edges()\n"
+    "plane.find_edges()\n"
+   ],
+   "metadata": {
+    "collapsed": false
+   }
+  },
+  {
+   "cell_type": "markdown",
+   "source": [
+    "13. Add gaussian noise to the `Image`. A higher `standard_deviation` will result in a noisier `Image`:\n"
+   ],
+   "metadata": {
+    "collapsed": false
+   }
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "outputs": [],
+   "source": [
+    "plane.add_gaussian_noise(standard_deviation=0.1)\n"
    ],
    "metadata": {
     "collapsed": false