diff --git a/classes/science/plate.py b/classes/science/plate.py
index 329715b..29988b4 100644
--- a/classes/science/plate.py
+++ b/classes/science/plate.py
@@ -147,13 +147,13 @@ class Plate:
 
     def compress( self ):
         """
-        Compress the plate data to fit the biggest dimension in a 1000
-        pixels axis and the smallest in a 100 pixels axis at minimum.
+        Compress the plate data to fit the biggest dimension in a 5000
+        pixels axis and the smallest in a 500 pixels axis at minimum.
         Return the compressed data and the compression factor used.
         """
-        min_factor = max( self.data.shape ) // 1000 # min factor to have a side
+        min_factor = max( self.data.shape ) // 5000 # min factor to have a side
         # with a maximum of 1000 pixels
-        max_factor =  min( self.data.shape ) // 100 # max factor to have
+        max_factor =  min( self.data.shape ) // 500 # max factor to have
         # a side with a minimum of 100 pixel
         if min_factor < max_factor:
             factor = int( mean( ( max_factor , min_factor ) ) )