Pytorch提取模型特征向量保存至csv的例子

Pytorch提取模型特征向量

# -*- coding: utf-8 -*-
"""
dj
"""
import torch
import torch.nn as nn
import os
from torchvision import models, transforms
from torch.autograd import Variable
import numpy as np
from PIL import Image
import torchvision.models as models
import pretrainedmodels
import pandas as pd
class FCViewer(nn.Module):
def forward(self, x):
 return x.view(x.size(0), -1)
class M(nn.Module):
def __init__(self, backbone1, drop, pretrained=True):
 super(M,self).__init__()
 if pretrained:
  img_model = pretrainedmodels.__dict__[backbone1](num_classes=1000, pretrained='imagenet')
 else:
  img_model = pretrainedmodels.__dict__[backbone1](num_classes=1000, pretrained=None)  
 self.img_encoder = list(img_model.children())[:-2]
 self.img_encoder.append(nn.AdaptiveAvgPool2d(1))
 self.img_encoder = nn.Sequential(*self.img_encoder)
 if drop > 0:
  self.img_fc = nn.Sequential(FCViewer())        
 else:
  self.img_fc = nn.Sequential(
   FCViewer())
def forward(self, x_img):
 x_img = self.img_encoder(x_img)
 x_img = self.img_fc(x_img)
 return x_img
model1=M('resnet18',0,pretrained=True)
features_dir = '/home/cc/Desktop/features'
transform1 = transforms.Compose([
 transforms.Resize(256),
 transforms.CenterCrop(224),
 transforms.ToTensor()])
file_path='/home/cc/Desktop/picture'
names = os.listdir(file_path)
print(names)
for name in names:
pic=file_path+'/'+name
img = Image.open(pic)
img1 = transform1(img)
x = Variable(torch.unsqueeze(img1, dim=0).float(), requires_grad=False)
y = model1(x)
y = y.data.numpy()
y = y.tolist()
#print(y)
test=pd.DataFrame(data=y)
#print(test)
test.to_csv("/home/cc/Desktop/features/3.csv",mode='a+',index=None,header=None)

jiazaixunlianhaodemoxing

import torch
import torch.nn.functional as F
import torch.nn as nn
import torch.optim as optim
import torchvision
import torchvision.transforms as transforms
import argparse
class ResidualBlock(nn.Module):
def __init__(self, inchannel, outchannel, stride=1):
 super(ResidualBlock, self).__init__()
 self.left = nn.Sequential(
  nn.Conv2d(inchannel, outchannel, kernel_size=3, stride=stride, padding=1, bias=False),
  nn.BatchNorm2d(outchannel),
  nn.ReLU(inplace=True),
  nn.Conv2d(outchannel, outchannel, kernel_size=3, stride=1, padding=1, bias=False),
  nn.BatchNorm2d(outchannel)
 )
 self.shortcut = nn.Sequential()
 if stride != 1 or inchannel != outchannel:
  self.shortcut = nn.Sequential(
   nn.Conv2d(inchannel, outchannel, kernel_size=1, stride=stride, bias=False),
   nn.BatchNorm2d(outchannel)
  )

def forward(self, x):
 out = self.left(x)
 out += self.shortcut(x)
 out = F.relu(out)
 return out

class ResNet(nn.Module):
def __init__(self, ResidualBlock, num_classes=10):
 super(ResNet, self).__init__()
 self.inchannel = 64
 self.conv1 = nn.Sequential(
  nn.Conv2d(3, 64, kernel_size=3, stride=1, padding=1, bias=False),
  nn.BatchNorm2d(64),
  nn.ReLU(),
 )
 self.layer1 = self.make_layer(ResidualBlock, 64, 2, stride=1)
 self.layer2 = self.make_layer(ResidualBlock, 128, 2, stride=2)
 self.layer3 = self.make_layer(ResidualBlock, 256, 2, stride=2)
 self.layer4 = self.make_layer(ResidualBlock, 512, 2, stride=2)
 self.fc = nn.Linear(512, num_classes)

def make_layer(self, block, channels, num_blocks, stride):
 strides = [stride] + [1] * (num_blocks - 1) #strides=[1,1]
 layers = []
 for stride in strides:
  layers.append(block(self.inchannel, channels, stride))
  self.inchannel = channels
 return nn.Sequential(*layers)

def forward(self, x):
 out = self.conv1(x)
 out = self.layer1(out)
 out = self.layer2(out)
 out = self.layer3(out)
 out = self.layer4(out)
 out = F.avg_pool2d(out, 4)
 out = out.view(out.size(0), -1)
 out = self.fc(out)
 return out

def ResNet18():

return ResNet(ResidualBlock)

import os
from torchvision import models, transforms
from torch.autograd import Variable
import numpy as np
from PIL import Image
import torchvision.models as models
import pretrainedmodels
import pandas as pd
class FCViewer(nn.Module):
def forward(self, x):
 return x.view(x.size(0), -1)
class M(nn.Module):
def __init__(self, backbone1, drop, pretrained=True):
 super(M,self).__init__()
 if pretrained:
  img_model = pretrainedmodels.__dict__[backbone1](num_classes=1000, pretrained='imagenet')
 else:
  img_model = ResNet18()
  we='/home/cc/Desktop/dj/model1/incption--7'
  # 模型定义-ResNet
  #net = ResNet18().to(device)
  img_model.load_state_dict(torch.load(we))#diaoyong  
 self.img_encoder = list(img_model.children())[:-2]
 self.img_encoder.append(nn.AdaptiveAvgPool2d(1))
 self.img_encoder = nn.Sequential(*self.img_encoder)
 if drop > 0:
  self.img_fc = nn.Sequential(FCViewer())        
 else:
  self.img_fc = nn.Sequential(
   FCViewer())
def forward(self, x_img):
 x_img = self.img_encoder(x_img)
 x_img = self.img_fc(x_img)
 return x_img
model1=M('resnet18',0,pretrained=None)
features_dir = '/home/cc/Desktop/features'
transform1 = transforms.Compose([
 transforms.Resize(56),
 transforms.CenterCrop(32),
 transforms.ToTensor()])
file_path='/home/cc/Desktop/picture'
names = os.listdir(file_path)
print(names)
for name in names:
pic=file_path+'/'+name
img = Image.open(pic)
img1 = transform1(img)
x = Variable(torch.unsqueeze(img1, dim=0).float(), requires_grad=False)
y = model1(x)
y = y.data.numpy()
y = y.tolist()
#print(y)
test=pd.DataFrame(data=y)
#print(test)
test.to_csv("/home/cc/Desktop/features/3.csv",mode='a+',index=None,header=None)

来源：https://blog.csdn.net/weixin_40123108/article/details/90678916