task 7

src/imagefilters/ImageFilters.scala

@@ -68,4 +68,8 @@ object ImageFilters {
       (Math.sqrt(dx*dx + dy*dy)*intensityFactor).toInt
     }
   })
+
+  def noise(a: Array[Array[Int]], intensity: Double): Array[Array[Int]] = filter(a, (value) => {
+    Math.max(0, Math.min(255, value + (Math.random()*2-1)*intensity)).toInt
+  })
 }