convert color image to grayscale image

+import cv2
+import os
+import numpy as np
+from PIL import Image
+ 
+path = 'C:\\Users\\sso07\\Desktop\\OSS term project\\frozen_character_grayscale\\겨울왕국 브루니'
+imagePaths = [os.path.join(path,file_name) for file_name in os.listdir(path)]
+count = 0
+for imagePath in imagePaths:
+    count += 1
+    img = Image.open(imagePath).convert('L')
+    img_numpy = np.array(img, 'uint8')
+    cv2.imwrite("C:\\Users\\sso07\\Desktop\\OSS term project\\frozen_character_grayscale\\흑백 브루니\\사진겨울왕국브루니" + str(count) + ".jpg", img_numpy)
+print("All Done")