diff --git a/Algorithm/AI/Histogram_of_Oriented_Gradients.md b/Algorithm/AI/Histogram_of_Oriented_Gradients.md
index 16d32be..efd066c 100644
--- a/Algorithm/AI/Histogram_of_Oriented_Gradients.md
+++ b/Algorithm/AI/Histogram_of_Oriented_Gradients.md
@@ -1,4 +1,6 @@
 # [Histogram of Oriented Gradients](https://www.learnopencv.com/histogram-of-oriented-gradients/)
 
+TODO:
+
 [人脸检测（1）——HOG特征](https://www.cnblogs.com/freedomker/p/7428522.html)  
 [人脸检测——基于机器学习4 HOG特征](https://www.cnblogs.com/gfgwxw/p/9743511.html)  
diff --git a/Software/Development/Libs/OpenCV/Demo/OpenCV_People_Counter.md b/Software/Development/Libs/OpenCV/Demo/OpenCV_People_Counter.md
index 918e0db..9da6569 100644
--- a/Software/Development/Libs/OpenCV/Demo/OpenCV_People_Counter.md
+++ b/Software/Development/Libs/OpenCV/Demo/OpenCV_People_Counter.md
@@ -1 +1,3 @@
 # [OpenCV People Counter](https://www.pyimagesearch.com/2018/08/13/opencv-people-counter/)
+
+TODO: