diff --git a/src/papillon.cpp b/src/papillon.cpp
index 0ed7567..1bc07bb 100644
--- a/src/papillon.cpp
+++ b/src/papillon.cpp
@@ -65,7 +65,7 @@ class Traite_image {
 
 			Mat next_stab;
 			stabiliseImg(prev, next, next_stab);
-            Rect myROI(next_stab.size().width/4, next_stab.size().height/4, next_stab.size().width/2, next_stab.size().height/2);
+            Rect myROI(next_stab.size().width/8, next_stab.size().height/8, next_stab.size().width*3/4, next_stab.size().height*3/4);
             Mat next_stab_cropped = next_stab(myROI);
             Mat prev_cropped = prev(myROI);
 			searchForMovement(prev_cropped, next_stab_cropped, output);