Keras – сверточные нейронные сети

Привожу код, который мы разберем. Датасет доступен по ссылке.

import torch
import keras
from keras.models import Sequential
from keras.layers import Dense, Conv2D, MaxPooling2D, Dropout, Flatten
import matplotlib.pyplot as plt
import numpy as np
from os import listdir
from sklearn.model_selection import train_test_split

def loadImages(path):
    imagesList = listdir(path)
    loadedImages = []
    for image in imagesList:
        loadedImages.append(plt.imread(path + image))
    return np.array(loadedImages)

panel = loadImages('./photo_small/panel/') / 255
modern = loadImages('./photo_small/modern/') / 255
photo = np.concatenate((panel, modern), axis=0)
label_first = np.concatenate((np.zeros(20), np.ones(20)), axis=0)
label_second = np.concatenate((np.ones(20), np.zeros(20)), axis=0)
label_almost = np.vstack((label_first, label_second))
label = label_almost.swapaxes(1,0)
X_train, X_test, y_train, y_test = train_test_split(photo, label, test_size=0.1, random_state=42)
model = Sequential()
model.add(Conv2D(32, kernel_size=(3, 3),
                 activation='relu'))
model.add(Conv2D(64, (3, 3), activation='relu'))
model.add(MaxPooling2D(pool_size=(2, 2)))
model.add(Dropout(0.25))
model.add(Flatten())
model.add(Dense(128, activation='relu'))
model.add(Dropout(0.5))
model.add(Dense(2, activation='softmax'))
model.compile(loss=keras.losses.binary_crossentropy,
              optimizer=keras.optimizers.Adam(),
              metrics=['accuracy'])
model.fit(X_train, y_train,
          epochs=40,
          verbose=1,
          validation_data=(X_test, y_test))

Видео, объясняющее код.