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!5670 modify lenet network 

Merge pull request !5670 from wukesong/lenet_network
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mindspore-ci-bot 2020-09-03 15:49:45 +08:00 committed by Gitee
parent 56207e0e65 4283c88e0f
commit 1c3fc5c49b
1 changed files with 10 additions and 36 deletions
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46
model_zoo/official/cv/lenet/src/lenet.py
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@ -14,27 +14,6 @@
# ============================================================================ # ============================================================================
"""LeNet.""" """LeNet."""
import mindspore.nn as nn import mindspore.nn as nn
from mindspore.common.initializer import TruncatedNormal
def conv(in_channels, out_channels, kernel_size, stride=1, padding=0):
"""weight initial for conv layer"""
weight = weight_variable()
return nn.Conv2d(in_channels, out_channels,
kernel_size=kernel_size, stride=stride, padding=padding,
weight_init=weight, has_bias=False, pad_mode="valid")
def fc_with_initialize(input_channels, out_channels):
"""weight initial for fc layer"""
weight = weight_variable()
bias = weight_variable()
return nn.Dense(input_channels, out_channels, weight, bias)
def weight_variable():
"""weight initial"""
return TruncatedNormal(0.02)
class LeNet5(nn.Cell): class LeNet5(nn.Cell):
@ -43,6 +22,7 @@ class LeNet5(nn.Cell):
Args: Args:
num_class (int): Num classes. Default: 10. num_class (int): Num classes. Default: 10.
channel (int): Num classes. Default: 1.
Returns: Returns:
Tensor, output tensor Tensor, output tensor
@ -53,26 +33,20 @@ class LeNet5(nn.Cell):
def __init__(self, num_class=10, channel=1): def __init__(self, num_class=10, channel=1):
super(LeNet5, self).__init__() super(LeNet5, self).__init__()
self.num_class = num_class self.num_class = num_class
self.conv1 = conv(channel, 6, 5) self.conv1 = nn.Conv2d(channel, 6, 5, pad_mode='valid')
self.conv2 = conv(6, 16, 5) self.conv2 = nn.Conv2d(6, 16, 5, pad_mode='valid')
self.fc1 = fc_with_initialize(16 * 5 * 5, 120) self.fc1 = nn.Dense(16 * 5 * 5, 120)
self.fc2 = fc_with_initialize(120, 84) self.fc2 = nn.Dense(120, 84)
self.fc3 = fc_with_initialize(84, self.num_class) self.fc3 = nn.Dense(84, self.num_class)
self.relu = nn.ReLU() self.relu = nn.ReLU()
self.max_pool2d = nn.MaxPool2d(kernel_size=2, stride=2) self.max_pool2d = nn.MaxPool2d(kernel_size=2, stride=2)
self.flatten = nn.Flatten() self.flatten = nn.Flatten()
def construct(self, x): def construct(self, x):
x = self.conv1(x) x = self.max_pool2d(self.relu(self.conv1(x)))
x = self.relu(x) x = self.max_pool2d(self.relu(self.conv2(x)))
x = self.max_pool2d(x)
x = self.conv2(x)
x = self.relu(x)
x = self.max_pool2d(x)
x = self.flatten(x) x = self.flatten(x)
x = self.fc1(x) x = self.relu(self.fc1(x))
x = self.relu(x) x = self.relu(self.fc2(x))
x = self.fc2(x)
x = self.relu(x)
x = self.fc3(x) x = self.fc3(x)
return x return x