Update README.md

Joke66 · web-flow · commit 97e2ce4b79da · 2020-03-16T14:52:37.000+08:00
diff --git a/08. 绘图功能/README.md b/08. 绘图功能/README.md
@@ -120,6 +120,8 @@ cv2.polylines(img, [line1, line2, line3], True, (0, 255, 255))
 - 参数3：文字的起始坐标（左下角为起点）
 - 参数4：字体
 - 参数5：文字大小（缩放比例）
+- 参数6：字体颜色BGR
+- 参数7：字体宽度（像素）
 
 ```python
 # 添加文字
@@ -154,4 +156,4 @@ cv2.putText(img, 'ex2tron', (10, 500), font,
 
 - [本节源码](https://github.com/ex2tron/OpenCV-Python-Tutorial/tree/master/08.%20%E7%BB%98%E5%9B%BE%E5%8A%9F%E8%83%BD)
 - [LineTypes](https://docs.opencv.org/3.3.1/d0/de1/group__core.html#gaf076ef45de481ac96e0ab3dc2c29a777)
-- [Drawing Functions in OpenCV](http://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_gui/py_drawing_functions/py_drawing_functions.html)
+- [Drawing Functions in OpenCV](http://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_gui/py_drawing_functions/py_drawing_functions.html)
