Add CUDNN version information

doc/doc_ch/installation.md

@@ -2,9 +2,10 @@
 
 经测试PaddleOCR可在glibc 2.23上运行，您也可以测试其他glibc版本或安装glic 2.23
 PaddleOCR 工作环境
-- PaddlePaddle1.7
+- PaddlePaddle 1.7+
 - python3
 - glibc 2.23
+- cuDNN 7.6+ (GPU)
 
 建议使用我们提供的docker运行PaddleOCR，有关docker使用请参考[链接](https://docs.docker.com/get-started/)。
 
@@ -58,7 +59,7 @@ python3 -m pip install paddlepaddle-gpu==1.7.2.post107 -i https://pypi.tuna.tsin
 
 如果您的机器是CPU，请运行以下命令安装
 
-python3 -m pip install paddlepaddle==1.7.2 -i https://pypi.tuna.tsinghua.edu.cn/simple
+python3 -m pip install paddlepaddle==1.8.0 -i https://pypi.tuna.tsinghua.edu.cn/simple
 
 更多的版本需求，请参照[安装文档](https://www.paddlepaddle.org.cn/install/quick)中的说明进行操作。
 ```

doc/doc_en/installation_en.md

@@ -3,10 +3,10 @@
 After testing, paddleocr can run on glibc 2.23. You can also test other glibc versions or install glic 2.23 for the best compatibility.
 
 PaddleOCR working environment:
-- PaddlePaddle1.7
+- PaddlePaddle 1.7+
 - python3
 - glibc 2.23
-
+- cuDNN 7.6+ (GPU)
 It is recommended to use the docker provided by us to run PaddleOCR, please refer to the use of docker [link](https://docs.docker.com/get-started/).
 
 1. (Recommended) Prepare a docker environment. The first time you use this image, it will be downloaded automatically. Please be patient.
@@ -47,7 +47,7 @@ docker images
 hub.baidubce.com/paddlepaddle/paddle   latest-gpu-cuda9.0-cudnn7-dev    f56310dcc829
 ```
 
-2. Install PaddlePaddle Fluid v1.7 (the higher version is not supported yet, the adaptation work is in progress)
+2. Install PaddlePaddle Fluid v1.7
 ```
 pip3 install --upgrade pip