Update black.py

black.py

@@ -0,0 +1,10 @@
+def to_black(image, transfer_style):
+    if transfer_style == "Hayao":
+         output = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)# 转换为灰度图像
+         return output
+    elif transfer_style == "Shinkai":
+        return image
+    elif transfer_style == "Kon Satoshi":
+        return image
+    else:
+        return image