diff --git a/script/imgtest.py b/script/imgtest.py
index d68a5f4..9880b09 100644
--- a/script/imgtest.py
+++ b/script/imgtest.py
@@ -27,7 +27,7 @@ def detect_samples(ip):
     binary_open(aux)
     return analyse_particles(aux, 250,1000, 
             fill_holes = False, exclude_edges = True,print_table=True,
-            output_image = "outlines", minCirc = 0.7, maxCirc = 1.0)
+            output_image = "outlines", minCirc = 0.5, maxCirc = 1.0)
 
 
 class MyFilter(Filter):