/Python/Cross-validation sklearn image classification

Cross-validation sklearn image classification

import numpy as np
import tensorflow as tf
from keras.models import Model
from keras.layers import Input, Activation, Dense, Conv2D, MaxPooling2D, Flatten
from keras.preprocessing.image import ImageDataGenerator
from keras.optimizers import Adam
from keras.callbacks import TensorBoard

# Images Dimensions
img_width, img_height = 200, 200

# Data Path
train_data_dir = 'data/train'
validation_data_dir = 'data/validation'

# Parameters
nb_train_samples = 100
nb_validation_samples = 50
epochs = 50
batch_size = 10

# TensorBoard Callbacks
callbacks = TensorBoard(log_dir='./Graph')

# Training Data Augmentation
train_datagen = ImageDataGenerator(
    rescale=1. / 255,
    shear_range=0.2,
    zoom_range=0.2,
    horizontal_flip=True)

# Rescale Testing Data
test_datagen = ImageDataGenerator(rescale=1. / 255)

# Train Data Generator
train_generator = train_datagen.flow_from_directory(
    train_data_dir,
    target_size=(img_width, img_height),
    batch_size=batch_size,
    class_mode='categorical')

# Testing Data Generator
validation_generator = test_datagen.flow_from_directory(
    validation_data_dir,
    target_size=(img_width, img_height),
    batch_size=batch_size,
    class_mode='categorical')

# Feature Extraction Layer KorNet
inputs = Input(shape=(img_width, img_height, 3))
conv_layer = Conv2D(16, (5, 5), strides=(3,3), activation='relu')(inputs) 
conv_layer = MaxPooling2D((2, 2))(conv_layer) 
conv_layer = Conv2D(32, (5, 5), strides=(3,3), activation='relu')(conv_layer) 
conv_layer = MaxPooling2D((2, 2))(conv_layer) 

# Flatten Layer
flatten = Flatten()(conv_layer) 

# Fully Connected Layer
fc_layer = Dense(32, activation='relu')(flatten)
outputs = Dense(3, activation='softmax')(fc_layer)

model = Model(inputs=inputs, outputs=outputs)

# Adam Optimizer and Cross Entropy Loss
adam = Adam(lr=0.0001)
model.compile(optimizer=adam, loss='categorical_crossentropy', metrics=['accuracy'])

# Print Model Summary
print(model.summary())

model.fit_generator(
    train_generator,
    steps_per_epoch=nb_train_samples // batch_size,
    epochs=epochs,
    validation_data=validation_generator,
    validation_steps=nb_validation_samples // batch_size, 
    callbacks=[callbacks])

model.save('./models/model.h5')
model.save_weights('./models/weights.h5')

Source: stackoverflow.com

Similar codes

1 vote131 views1 answer
Requirements.txt flask
Python Flask
1 vote117 views2 answers
Create requirements.txt conda
Python
0 vote122 views1 answer
Split and only grab first part of string
Python
2 votes134 views2 answers
Python how to sum two lists
Python
1 vote119 views1 answer
How to convert kg to g using python
Python
0 vote117 views1 answer
Set .intersection() operation solution in python3
Python
2 votes111 views2 answers
Nth root of a number python
Python
0 vote126 views4 answers
Unpacking of tuples in python
Python
0 vote113 views1 answer
Fetch python
Python
1 vote116 views1 answer
Piythin comment
Python