diff --git a/app/service/generate_image/utils/image_processing.py b/app/service/generate_image/utils/image_processing.py
index f1a49c9..ed9fb59 100644
--- a/app/service/generate_image/utils/image_processing.py
+++ b/app/service/generate_image/utils/image_processing.py
@@ -139,7 +139,7 @@ def bounding_box(image):
     return result_image
 
 
-def stain_detection(image, spot_size=200):
+def stain_detection(image, spot_size=100):
     height, width, _ = image.shape
 
     corners = [