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definitions_v4_vgg.py
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definitions_v4_vgg.py
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# -*- coding: utf-8 -*-
"""
Created on Tue Mar 12 12:53:53 2019
@author: chris
"""
#----------------------Imports------------------------------
import numpy as np
import torch
import torch.nn as nn
import torch.nn.functional as F
from torch.autograd import Variable
import torch.utils.data as data
import torchvision
from torchvision import transforms
from torchvision import *
import torch
import math
import numpy as np
import matplotlib.pyplot as plt
import time as t
import torch.optim as optim
from PIL import Image, ImageOps
from keras.applications.vgg16 import VGG16
from keras.preprocessing import image
from keras.applications.vgg16 import preprocess_input
from keras.layers import Input, Flatten, Dense
from keras.models import Model
import numpy as np
from keras.applications.vgg19 import VGG19
from keras.preprocessing import image
from keras.applications.vgg19 import preprocess_input
from keras.models import Model
import numpy as np
base_model = VGG19(weights='imagenet')
model = Model(inputs=base_model.input, outputs=base_model.get_layer('block4_pool').output)
#--------------------Data Loading and Splitting ---------------------------------
def get_data_loader(batch_size):
train_path = r'trainData'
val_path = r'valData'
#test_path = r'testData'
transform = transforms.Compose([transforms.ToTensor(),transforms.Normalize((0.5, 0.5, 0.5), (0.5, 0.5, 0.5))])
trainSet = torchvision.datasets.ImageFolder(root=train_path, transform=transform)
train_data_loader = torch.utils.data.DataLoader(trainSet, batch_size=batch_size, shuffle=True)
valSet = torchvision.datasets.ImageFolder(root=val_path, transform=transform)
val_data_loader = torch.utils.data.DataLoader(valSet, batch_size=batch_size, shuffle=True)
#testSet = torchvision.datasets.ImageFolder(root=test_path, transform=transform)
#test_data_loader = torch.utils.data.DataLoader(testSet, batch_size=batch_size, shuffle=True)
return train_data_loader , val_data_loader#, test_data_loader
#--------------------Base Model----------------------------------------------------
#class Model(nn.Module):
def __init__(self, input_size):
super(Model, self).__init__()
self.input_size = 600
self.name = "Base"
self.input= Input(shape=(self.input_size,self.input_size,3),name = 'image_input')
self.model_vgg16_conv = VGG16(weights='imagenet', include_top=False)
#self.model_vgg16_conv.summary()
self.output_vgg16_conv = self.model_vgg16_conv(self.input)
#self.pool = nn.MaxPool2d(2, 2)
self.x1 = Flatten(name='flatten')(self.output_vgg16_conv)
self.x2 = Dense(4096, activation='relu', name='x2')(self.x1)
self.x3 = Dense(4096, activation='relu', name='x3')(self.x2)
self.x4 = Dense(2, activation='softmax', name='predictions')(self.x3)
def forward(self, x):
x = self.pool(F.relu(self.conv1(model_vgg16_conv)))
#print(type(x))
x = self.pool(F.relu(self.conv2(output_vgg16_conv)))
#print(type(x))
#x = x.view(-1,int(7 * 147 * 147) )
#print(type(x))
x = self.x1(x)
#print(type(x))
x = self.x2(x)
#print(type(x))
x = self.x3(x)
#print(type(x))
x = self.x4(x)
#print(type(x))
x = x.squeeze(1) # Flatten to [batch_size]
#print(type(x))
return x
class VGG(nn.Module):
def __init__(self):
super(VGG, self).__init__()
self.layer1 = nn.Linear(3*600*600, 10000)
self.layer2 = nn.Linear(10000, 500)
self.layer3 = nn.Linear(500, 2)
def forward(self, img):
flattened = img.view(-1,3*600*600)
activation1 = F.relu(self.layer1(img))
activation2 = F.relu(self.layer2(activation1))
output = self.layer3(activation2)
return output
#-------------------Train Loop (Ft. Get Accuracy & Plotting)----------------------------------------
def get_accuracy(model,set_, batch_size):
batch_size=16
label_ = [0]*(batch_size*2)
for i in range(batch_size,batch_size*2):
label_[i] = 1
label = torch.tensor(label_).cuda()
trainSet_,valSet_ = get_data_loader(batch_size)
if set_ == "train":
data_ = trainSet_
elif set_ == "val":
data_ = valSet_
correct = 0
total = 0
for img,batch in data_:
img,batch=img.cuda(),batch.cuda()
if(len(batch)==batch_size):
b = torch.split(img,600,dim=3)
img = torch.cat(b, 0)
output = model(img).cuda()
pred = output.max(1, keepdim=True)[1] # get the index of the max log-probability
correct += pred.eq(label.view_as(pred)).sum().item() #compute how many predictions were correct
total += img.shape[0] #get the total ammount of predictions
return correct / total
def train(mdl,epochs= 20,batch_size = 32,learning_rate =0.0001):
mdl.cuda()
#print(mdl.parameters())
criterion = nn.CrossEntropyLoss()
optimizer = optim.SGD(mdl.parameters(), lr=learning_rate, momentum=0.9)
trainSet,valSet = get_data_loader(batch_size)
train_acc, val_acc = [], []
n = 0 # the number of iterations
label_ = [0]*(batch_size*2)
for i in range(batch_size,batch_size*2):
label_[i] = 1
label = torch.tensor(label_).cuda()
print("--------------Starting--------------")
for epoch in range(epochs): # loop over the dataset multiple times
t1 = t.time()
itera = 0
filteredimg=[]
for img,batch in iter(trainSet):
#img, batch = img.cuda(), batch.cuda()
if(len(batch)!=batch_size):
break
img,batch=img.cuda(),batch.cuda()
b = torch.split(img,600,dim=3)
img = torch.cat(b, 0)
vgg = model(img)
print(vgg.shape)
# print(label)
itera += batch_size*2
out = mdl(vgg)
loss = criterion(out, label)
loss.backward()
optimizer.step()
optimizer.zero_grad()
# print(itera)
# Calculate the statistics
train_acc.append(get_accuracy(mdl,"train", batch_size))
# val_acc.append(get_accuracy(mdl,"val")) # compute validation accuracy
n += 1
print("Epoch",n,"Done in:",t.time() - t1, "With Training Accuracy:",train_acc[-1])#, "And Validation Accuracy:",val_acc[-1])
# Save the current model (checkpoint) to a file
model_path = "model_{0}_bs{1}_lr{2}_epoch{3}".format(mdl.name,batch_size,learning_rate,epoch)
torch.save(mdl.state_dict(), model_path)
iterations = list(range(1,epochs + 1))
print("--------------Finished--------------")
return iterations,train_acc #, val_acc
def plot(iterations,train_acc, val_acc):
plt.title("Training Curve")
plt.plot(iterations, train_acc, label="Train")
plt.plot(iterations, val_acc, label="Validation")
plt.xlabel("Epochs")
plt.ylabel("Training Accuracy")
plt.legend(loc='best')
plt.show()
print("Final Training Accuracy: {}".format(train_acc[-1]))
print("Final Validation Accuracy: {}".format(val_acc[-1]))