Pytorch提取模型特征向量保存至csv的例子

yipeiwu_com6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

PHP实现发送和接收JSON请求

现在微服务中,很多API由于需要传递的参数较多所以要求用包含所有参数的JSON数据作为POST请求的请求体来替代FormData传递参数的方式,在参数量较多时POST JSON要比POS...

Python数据结构之哈夫曼树定义与使用方法示例

Python数据结构之哈夫曼树定义与使用方法示例

本文实例讲述了Python数据结构之哈夫曼树定义与使用方法。分享给大家供大家参考,具体如下: HaffMan.py #coding=utf-8 #考虑权值的haff曼树查找效率并非最...

Python使用中文正则表达式匹配指定中文字符串的方法示例

Python使用中文正则表达式匹配指定中文字符串的方法示例

本文实例讲述了Python使用中文正则表达式匹配指定中文字符串的方法。分享给大家供大家参考,具体如下: 业务场景: 从中文字句中匹配出指定的中文子字符串 .这样的情况我在工作中遇到非常多...

Python随机数random模块使用指南

random 模块是Python自带的模块,除了生成最简单的随机数以外,还有很多功能。 random.random() 用来生成一个0~1之间的随机浮点数,范围[0,10 >...

使用Python标准库中的wave模块绘制乐谱的简单教程

使用Python标准库中的wave模块绘制乐谱的简单教程

在本文中,我们将探讨一种简洁的方式,以此来可视化你的MP3音乐收藏。此方法最终的结果将是一个映射你所有歌曲的正六边形网格地图,其中相似的音轨将处于相邻的位置。不同区域的颜色对应不同的音乐...