diff --git a/binari_adaptive_thresholding.py b/binari_adaptive_thresholding.py
index dba8e42..bac1380 100644
--- a/binari_adaptive_thresholding.py
+++ b/binari_adaptive_thresholding.py
@@ -1,11 +1,27 @@
 import cv2
-import numpy as np
-import matplotlib.pyplot as plt
 
 
 image_path = "test.jpg"
 image = cv2.imread(image_path, cv2.IMREAD_GRAYSCALE)
 
+height, width = image.shape
+print(f'height: {height}, width: {width}')  # 이미지 가로, 세로 크기
+
+# 블록 크기에 따른 빨간 선
+def draw_grid(image, block_size=51):
+    grid_img = cv2.cvtColor(image, cv2.COLOR_GRAY2BGR)
+    for x in range(0, width, block_size):
+        cv2.line(grid_img, (x, 0), (x, height), (0, 0, 255), 1)
+    for y in range(0, height, block_size):
+        cv2.line(grid_img, (0, y), (width, y), (0, 0, 255), 1)
+    return grid_img
+
+block_check = draw_grid(image)
+
+cv2.namedWindow('block check', cv2.WINDOW_NORMAL)
+cv2.imshow('block check', block_check)
+
+
 # ------ Mean Adaptive Thresholding -------
 
 mean_bin = cv2.adaptiveThreshold(image, 255, cv2.ADAPTIVE_THRESH_MEAN_C, cv2.THRESH_BINARY, 51, 10)