From f36dad7c9ce80672ee85ad8fa7468a9653607092 Mon Sep 17 00:00:00 2001
From: yoyoyo-yo <naga.yoshi.yoshi@gmail.com>
Date: Tue, 22 Oct 2019 22:45:06 +0900
Subject: [PATCH] add

---
 Question_01_10/answers_cpp/answer_9.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Question_01_10/answers_cpp/answer_9.cpp b/Question_01_10/answers_cpp/answer_9.cpp
index a43ecc94..246b5f32 100644
--- a/Question_01_10/answers_cpp/answer_9.cpp
+++ b/Question_01_10/answers_cpp/answer_9.cpp
@@ -25,7 +25,7 @@ cv::Mat gaussian_filter(cv::Mat img, double sigma, int kernel_size){
     for (int x = 0; x < kernel_size; x++){
       _y = y - pad;
       _x = x - pad; 
-      kernel[y][x] = 1 / (sigma * sqrt(2 * M_PI)) * exp( - (_x * _x + _y * _y) / (2 * sigma * sigma));
+      kernel[y][x] = 1 / (2 * M_PI * sigma * sigma) * exp( - (_x * _x + _y * _y) / (2 * sigma * sigma));
       kernel_sum += kernel[y][x];
     }
   }