From 25ddeb72848368792a12daf976142be4ed69e670 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Joaqu=C3=ADn=20Garc=C3=ADa=20Venegas?=
 <42295045+joaquingv12@users.noreply.github.com>
Date: Sat, 15 Jan 2022 20:12:30 +0100
Subject: [PATCH] Fix error in zero_crossing

---
 Chapter_05/code/Chapter_05.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Chapter_05/code/Chapter_05.py b/Chapter_05/code/Chapter_05.py
index b15230d..cf19200 100644
--- a/Chapter_05/code/Chapter_05.py
+++ b/Chapter_05/code/Chapter_05.py
@@ -499,8 +499,8 @@ def calculate_minutiaes(im):
 def any_neighbor_neg(img, i, j):
     for k in range(-1,2):
       for l in range(-1,2):
-         if img[i+k, j+k] < 0:
-            return True, img[i, j] - img[i+k, j+k]
+         if img[i+k, j+l] < 0:
+            return True, img[i, j] - img[i+k, j+l]
     return False, None
 
 def zero_crossing(img, th):