diff --git a/.gitignore b/.gitignore
index b88c52a90ca5a96f1f479e79691e4f7bd731c4cf..4b414c9830397fbb76b0abf734f5e6c02e81021e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,9 +1,7 @@
 # IDE
-.idea
 .vscode
-
-# System
 .DS_Store
+.idea
 
 # Build Temp
 build
diff --git a/example/vision/classification/README.md b/example/vision/classification/README.md
index e1819f76ea16b27246779d69a70c17d625a8bf21..82db7c0a74e9ec09b94c9b531beb8e35d5d29012 100644
--- a/example/vision/classification/README.md
+++ b/example/vision/classification/README.md
@@ -59,7 +59,7 @@ Labelme 是一个 python 语言编写，带有图形界面的图像标注软件
 
 ![](images/Labelme_Dataset.png)
 
-进入 **Dataset** 文件夹，创建 **images** 文件夹、**annocations** 文件夹、**flags.txt** 文件，如下图:
+进入 **Dataset** 文件夹，创建 **images** 文件夹、**annotations** 文件夹、**flags.txt** 文件，如下图:
 
 ![](images/images_annocations_flags.png)
 
diff --git a/example/vision/classification/python/README.md b/example/vision/classification/python/README.md
index cc88e73673ee16d02b8da20e5e88f08dd0746a25..c3a4accb109031a321eae2209471965115623e47 100644
--- a/example/vision/classification/python/README.md
+++ b/example/vision/classification/python/README.md
@@ -144,11 +144,11 @@ if __name__ == "__main__":
         read_index = 0
         total_time_ms = 0
         for i in range(30):
+            start_time = time.time()
             ret, mat = video_capture.read()
             if ret is False:
                 continue
 
-            start_time = time.time()
             result = model.predict(mat)
             end_time = time.time()
             total_time_ms += end_time - start_time