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README.md

在 CocoPi 上使用 numpy + mnist 训练模型导出导入验证的教程

测试集位于 mnist_test.csv ;

训练集位于 mnist_train.zip (csv格式超过可上传最大值);

code包括神经网络模型和用测试、训练数据跑出的最优模型;

数据集:MINIST;

不可使用 pytorch,tensorflow 等 python package,可以使用numpy;

准备数据集

CSV 文件内容介绍:(https://blog.csdn.net/CVSvsvsvsvs/article/details/85127096)

更多数据集可以自己寻找或制作:制作minist格式的图像数据集

在板子上训练

这里演示十分钟即可在 wiki.sipeed.com/m2dock 上训练 mnist 模型,精简数据集为 100 测试 10 验证,可快速体验效果。

00_demo.ipynb 01_min_train.py 02_val_mnist.py

完整的演示过程 00_demo.ipynb 其他脚本可以直接在板子依次运行。

使用 numpy 训练要打开 numpy.random 模块

rm -rf /usr/lib/python3.8/site-packages/numpy/random/__init__.py

想恢复就用

touch /usr/lib/python3.8/site-packages/numpy/random/__init__.py

该功能只影响开机加载 numpy 的速度以及内存占用,因为 maixpy3 底层是应用了 numpy 进行部分后处理转换的,所以会发现部署 AI 应用的时候开机速度很慢。


cd NeuralNetwork

adb push mnist_test_10.csv mnist_train_100.csv 01_min_train.py 02_val_mnist.py /root

adb push resc /root/resc

adb shell

rm -rf /usr/lib/python3.8/site-packages/numpy/random/__init__.py

cd /root/

python 01_min_train.py # 训练模型并导出

python 02_val_mnist.py # 加载模型并验证

运行结果如下:

juwan@juwan-n85-dls:~$ cd NeuralNetwork
juwan@juwan-n85-dls:~/NeuralNetwork$
juwan@juwan-n85-dls:~/NeuralNetwork$ adb push mnist_test_10.csv mnist_train_100.csv 01_min_train.py 02_val_mnist.py /root
mnist_test_10.csv: 1 file pushed. 3.4 MB/s (18006 bytes in 0.005s)
mnist_train_100.csv: 1 file pushed. 4.2 MB/s (182023 bytes in 0.041s)
01_min_train.py: 1 file pushed. 2.0 MB/s (4940 bytes in 0.002s)
02_val_mnist.py: 1 file pushed. 2.1 MB/s (3972 bytes in 0.002s)
4 files pushed. 3.8 MB/s (208941 bytes in 0.053s)
juwan@juwan-n85-dls:~/NeuralNetwork$
juwan@juwan-n85-dls:~/NeuralNetwork$ adb push resc /root/resc
resc/: 6 files pushed. 3.6 MB/s (13866458 bytes in 3.723s)
juwan@juwan-n85-dls:~/NeuralNetwork$
juwan@juwan-n85-dls:~/NeuralNetwork$ adb shell


BusyBox v1.27.2 () built-in shell (ash)

------run profile file-----
=========================================================
    ______                         ______
   /\  _  \                       /\  _  \  __
   \ \ \/\_\    ____    ____   ___\ \ \_\ \/\_\
    \ \ \/_/_  / __ \  / __ \ / __'\ \  __/\/_/_
     \ \ \_\ \/\ \_\ \/\ \__//\ \_\ \ \ \/   /\ \
      \ \____/\ \____/\ \____\ \____/\ \_\   \ \_\
       \/___/  \/___/  \/____/\/___/  \/_/    \/_/
  __
 /\ \       __                           ----------------
 \ \ \     /\_\    ____  __  __  __  _    pi.cocorobo.hk
  \ \ \    \/_/_ /  _  \/\ \/\ \/\ \/ \  ----------------
   \ \ \____ /\ \/\ \/\ \ \ \_\ \/>  </   SYSTEM VERSION
    \ \_____\\ \_\ \_\ \_\ \____//\_/\_\  - V6 23.0825 -
     \/_____/ \/_/\/_/\/_/\/___/ \//\/_/ ----------------

=========================================================

root@CocoPi:/#
root@CocoPi:/# rm -rf /usr/lib/python3.8/site-packages/numpy/random/__init__.py
root@CocoPi:/#
root@CocoPi:/# cd /root/
root@CocoPi:/#
root@CocoPi:~# python 01_min_train.py # 训练模型并导出
(100, 785)
(10, 785)
准确度50.00%
隐藏层节点数512,学习率0.100000,准确度60.00%
隐藏层节点数512,学习率0.200000,准确度50.00%
隐藏层节点数512,学习率0.300000,准确度60.00%
隐藏层节点数256,学习率0.100000,准确度60.00%
隐藏层节点数256,学习率0.200000,准确度60.00%
隐藏层节点数256,学习率0.300000,准确度50.00%
隐藏层节点数128,学习率0.100000,准确度60.00%
隐藏层节点数128,学习率0.200000,准确度60.00%
隐藏层节点数128,学习率0.300000,准确度60.00%
第1次训练,准确度50.00%
第2次训练,准确度60.00%
第3次训练,准确度70.00%
第4次训练,准确度70.00%
第5次训练,准确度70.00%
第6次训练,准确度70.00%
第7次训练,准确度70.00%
第8次训练,准确度70.00%
第9次训练,准确度70.00%
第10次训练,准确度70.00%
root@sipeed:~#
root@sipeed:~# python 02_val_mnist.py # 加载模型并验证
NeuralNetwork:
input_nodes = 784, hidden_nodes = 128,
outputnodes = 10, learningrate = 0.025
(1, 784)
save:  ./imgs/sxsz.ttf_0_6.png
(1, 784)
save:  ./imgs/sxsz.ttf_1_6.png
(1, 784)
save:  ./imgs/sxsz.ttf_2_8.png
(1, 784)
save:  ./imgs/sxsz.ttf_3_3.png
(1, 784)
save:  ./imgs/sxsz.ttf_4_9.png
(1, 784)
save:  ./imgs/sxsz.ttf_5_6.png
(1, 784)
save:  ./imgs/sxsz.ttf_6_6.png
(1, 784)
save:  ./imgs/sxsz.ttf_7_1.png
(1, 784)
save:  ./imgs/sxsz.ttf_8_6.png
(1, 784)
save:  ./imgs/sxsz.ttf_9_7.png
(1, 784)
save:  ./imgs/sans.ttf_0_2.png
(1, 784)
save:  ./imgs/sans.ttf_1_1.png
(1, 784)
save:  ./imgs/sans.ttf_2_2.png
(1, 784)
save:  ./imgs/sans.ttf_3_3.png
(1, 784)
save:  ./imgs/sans.ttf_4_3.png
(1, 784)
save:  ./imgs/sans.ttf_5_6.png
(1, 784)
save:  ./imgs/sans.ttf_6_6.png
(1, 784)
save:  ./imgs/sans.ttf_7_2.png
(1, 784)
save:  ./imgs/sans.ttf_8_6.png
(1, 784)
save:  ./imgs/sans.ttf_9_4.png
root@sipeed:~#

可见 sans,ttf 字体的识别效果在 0 1 2 3 6 有一定的正确性,如果想要更好的,可以拿完整的 60000 : 10000 训练,这里为了快速演示效果,采用了 100 : 10