From 4d96d915e48f4775b475e5c52f2720f11c119254 Mon Sep 17 00:00:00 2001
From: cnmckee <43614259+cnmckee@users.noreply.github.com>
Date: Tue, 27 Aug 2019 14:29:55 -0600
Subject: [PATCH] Fix NMS bug

---
 utils.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/utils.py b/utils.py
index 8349e87..c4cce93 100644
--- a/utils.py
+++ b/utils.py
@@ -160,7 +160,7 @@ def _iou(box1, box2):
     int_x1 = min(b1_x1, b2_x1)
     int_y1 = min(b1_y1, b2_y1)
 
-    int_area = (int_x1 - int_x0) * (int_y1 - int_y0)
+    int_area = max(int_x1 - int_x0, 0) * max(int_y1 - int_y0, 0)
 
     b1_area = (b1_x1 - b1_x0) * (b1_y1 - b1_y0)
     b2_area = (b2_x1 - b2_x0) * (b2_y1 - b2_y0)