diff --git a/datasets/raise/utils.py b/datasets/raise/utils.py
index 79fa11d..a116edb 100644
--- a/datasets/raise/utils.py
+++ b/datasets/raise/utils.py
@@ -24,4 +24,12 @@ def denoise(imageNpArray, denoiserName):
             imageDenoisedNpArray = skImageRestorationDenoise(imageNpArray, sigma_color=0.05, sigma_spatial=15)
         case 'tv_chambolle':
             imageDenoisedNpArray = skImageRestorationDenoise(imageNpArray, weight=0.2)
-    return imageDenoisedNpArray
\ No newline at end of file
+    return imageDenoisedNpArray
+
+class iterativeMean():
+    mean = 0
+    numberOfElementsInMean = 0
+
+    def addElement(self, element):
+        self.mean = ((self.mean * self.numberOfElementsInMean) + element) / (self.numberOfElementsInMean + 1)
+        self.numberOfElementsInMean += 1
\ No newline at end of file