2021 lab

Readme.md

@@ -7,10 +7,10 @@ This Python Opencv Lab is split into two parts.
 
 ### Briefly Introduction
 
-[python_opencv_lab_2020.pdf](./python_opencv_lab_2020.pdf)
+[python_opencv_lab_2021.pdf](./python_opencv_lab_2021.pdf)
 
 ### Reference
-The lab practice referred to [OpenCVtutorial](http://opencv-python-tutroals.readthedocs.io/en/latest/index.html), NTU Computer Vision: from Recognition to Geometry (CV) course [website](http://media.ee.ntu.edu.tw/courses/cv/19F/) and NTU Deep Learning for Computer Vision (DLCV) course [website](http://vllab.ee.ntu.edu.tw/dlcv.html).
+The lab practice referred to [OpenCVtutorial](https://docs.opencv.org/4.5.2/d9/df8/tutorial_root.html), NTU Computer Vision: from Recognition to Geometry (CV) course [website](http://media.ee.ntu.edu.tw/courses/cv/21S/) and NTU Deep Learning for Computer Vision (DLCV) course [website](http://vllab.ee.ntu.edu.tw/dlcv.html).
 
 ### Prerequisites
 - python3.5+