Pytorch提取模型特征向量保存至csv的例子

yipeiwu_com5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

解决pandas read_csv 读取中文列标题文件报错的问题

从windows操作系统本地读取csv文件报错 data = pd.read_csv(path) Traceback (most recent call last): Fi...

Python小程序之在图片上加入数字的代码

Python小程序之在图片上加入数字的代码

在GitHub上发现一些很有意思的项目,由于本人作为Python的初学者,编程代码能力相对薄弱,为了加强Python的学习,特此利用前辈们的学习知识成果,自己去亲自实现。 来源:Gi...

Python中Numpy mat的使用详解

前面介绍过用dnarray来模拟,但mat更符合矩阵,这里的mat与Matlab中的很相似。(mat与matrix等同) 基本操作 >>> m= np.mat([1...

windows安装TensorFlow和Keras遇到的问题及其解决方法

windows安装TensorFlow和Keras遇到的问题及其解决方法

  安装TensorFlow在Windows上,真是让我心力交瘁,想死的心都有了,在Windows上做开发真的让人发狂。   首先说一下我的经历,本来也就是起初,网上说python3.7...

解决python报错MemoryError的问题

如下: python 32bit 最大只能使用 2G 内存,坑爹之处,超过 2G 报错MemoryError。 而 64bit python则无此限制,所以建议使用 64bit pyth...