Pytorch提取模型特征向量保存至csv的例子

yipeiwu_com7年前Python基础

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)

以上这篇Pytorch提取模型特征向量保存至csv的例子就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持【听图阁-专注于Python设计】。

相关文章

Python中在for循环中嵌套使用if和else语句的技巧

for...[if]...构建List (List comprehension) 1.简单的for...[if]...语句 Python中,for...[if]...语句一种简洁的构建L...

Django 简单实现分页与搜索功能的示例代码

Django 简单实现分页与搜索功能的示例代码

假设现有需求如下: 需要一个页面分页展示信息,在该页面添加搜索框以提供检索功能。 那么,我们知道,展示信息和检索功能是在同一个页面,也就是共用一个路由。 代码如下: 第一步,写路由:为了...

python多线程threading.Lock锁用法实例

本文实例讲述了python多线程threading.Lock锁的用法实例,分享给大家供大家参考。具体分析如下: python的锁可以独立提取出来 复制代码 代码如下:mutex = th...

Flask框架学习笔记(一)安装篇(windows安装与centos安装)

Flask 依赖于两个外部库: Werkzeug  和  Jinja2  。 Werkzeug 是一个 WSGI (在 web 应用和多种服务器之间开发和部...

Python中__repr__和__str__区别详解

看下面的例子就明白了 class Test(object): def __init__(self, value='hello, world!'): self.data =...