def show06():
start_image_file = '000238.jpg'
end_image_file = '000193.jpg'
images, _ = data_flow.next()
z_points = vae.encoder.predict(images)
interpolated_images = []
interpolated_images.append(images[0]) # Add the first selected image.
factors = np.arange(0, 1, 0.1)
for factor in factors:
z = z_points[0] * (1 - factor) + z_points[1] * factor
img = vae.decoder.predict(np.array([z]))[0]
interpolated_images.append(img)
interpolated_images.append(images[1]) # Add the second selected image.
num_interpolated_images = len(factors)
viewer = Viewer(num_rows=1, num_cols=num_interpolated_images+2, width=num_interpolated_images+2, height=1)
viewer.add_row(interpolated_images)
viewer.show()
def show03():
viewer = Viewer(num_rows=3, num_cols=10, width=10, height=3)
for i in range(3):
z_points = np.random.normal(size=(10, vae.z_dim))
generated_images = vae.decoder.predict(np.array(z_points))
viewer.add_row(generated_images)
viewer.show()
def show05():
z_avg_pos = np.zeros(shape=vae.z_dim, dtype='float32') # for the attribute with '+1'
z_avg_neg = np.zeros(shape=vae.z_dim, dtype='float32') # for the attribute with '-1'
z_count_pos = 0
z_count_neg = 0
while True:
images, labels = data_flow.next()
z_points = vae.encoder.predict(images)
z_points_pos = z_points[labels== 1]
z_points_neg = z_points[labels==-1]
z_avg_pos += np.sum(z_points_pos, axis=0)
z_avg_neg += np.sum(z_points_neg, axis=0)
z_count_pos += len(z_points_pos)
z_count_neg += len(z_points_neg)
if z_count_pos > 2000: # 2000 points are enough to get the center.
break;
z_avg_pos = z_avg_pos / z_count_pos
z_avg_neg = z_avg_neg / z_count_neg
z_direction = z_avg_pos - z_avg_neg
magnitude = np.linalg.norm(z_direction) # magnitude
z_direction = z_direction / magnitude # normalization
# Select the first five images from the next batch.
images, _ = data_flow.next()[:5]
z_points = vae.encoder.predict(images)
z_scales = [-4, -3, -2, -1, 0, 1, 2, 3, 4]
viewer = Viewer(num_rows=5, num_cols=9, width=9, height=5)
for i in range(5):
images = []
for z_scale in z_scales:
changed_z_point = z_points[i] + z_direction * z_scale
changed_image = vae.decoder.predict(np.array([changed_z_point]))[0]
images.append(changed_image)
viewer.add_row(images)
viewer.show()
def show01():
input_images, _ = data_flow.next() # Get the first batch.
input_images = input_images[:10] # Select the first 10 images from it.
# method 1
#z_points = vae.encoder.predict(input_images)
#reconstructed_images = vae.decoder.predict(z_points)
#print(len(z_points)) = 10: # of inputs
#print(z_points.shape) = (10, 200): (# of inputs, z_dim)
# method 2
output_images = vae.model.predict(input_images)
viewer = Viewer(num_rows=2, num_cols=10, width=10, height=2)
viewer.add_row(input_images)
viewer.add_row(output_images)
viewer.show()
def _export_result(self, epoch):
viewer = Viewer(num_rows=5, num_cols=5, width=15, height=15)
for i in range(5):
noise = np.random.normal(0, 1, (5, self.z_dim))
imgs = self.generator.predict(noise)
imgs = ((127.5 * imgs) + 127.5).astype('uint8').clip(
0, 255) # from [-1.0, +1.0] to [0, 255]
viewer.add_row(imgs)
viewer.save('result/QuickDraw_GAN/sample_%d.png' % epoch)
def show04():
viewer = Viewer(num_rows=5, num_cols=10, width=10, height=5)
for i in range(5):
satisfied_images = []
while True:
images, labels = data_flow.next()
for j in range(len(images)):
if labels[j] == 1: # satisfied!
satisfied_images.append(images[j])
if len(satisfied_images) > 10:
break
viewer.add_row(satisfied_images[:10]) # Show only the first 10 images in a column.
viewer.show()
iterations = 5 # to augment the data 5 times
data_flow = data_gen.flow_from_directory(
directory='./data/animals', # data directory path
target_size=(100,
100), # from (128, 128) to (100, 100) (NOTE: no channels)
batch_size=
batch_size, # batch size specifying how many images to be read at once
shuffle=True, # random shuffling
class_mode='categorical' # to get the one-hot encoded labels
#class_mode = 'binary' # to get the single digit labels
)
######################
# iteration method 1 #
viewer = Viewer(num_rows=iterations, num_cols=batch_size, width=10, height=10)
for i in range(iterations):
images, labels = [], []
image, label = data_flow.next()
for j in range(batch_size):
images.append(image[j])
labels.append(label[j])
viewer.add_row(images, labels)
viewer.show()
# shuffle
weights = model.get_weights()
weights = [np.random.permutation(w.flat).reshape(w.shape) for w in weights]
model.set_weights(weights)
# load
try:
model = load_model('result/model_saved')
print('Succeeded to load')
except ValueError:
print('Failed to load.')
########################
# evaluating the model #
model.evaluate(x_test, y_test, batch_size=1000)
######################
# drawing the result #
indices = select_indices(len(x_test), 10)
x = select_items(x_test, indices)
y = select_items(y_test, indices)
answer = to_classes(y, 'CIFAR10')
predicted = to_classes(model.predict(x), 'CIFAR10')
viewer = Viewer(num_rows=2, num_cols=10, width=15, height=2)
viewer.add_row(x, answer, predicted)
viewer.show()
plt.scatter(z_points[:, 0],
z_points[:, 1],
cmap='rainbow',
c=y_test,
alpha=0.5,
s=2)
plt.colorbar()
num_samples = 30
z_samples = generate_random_points(num_samples, xMin, xMax, yMin, yMax)
plt.scatter(z_samples[:, 0], z_samples[:, 1], c='black', alpha=1, s=20)
# reconstructed images
reconstructed_images = ae.decoder.predict(z_samples)
z_samples = np.round(z_samples, 1)
viewer = Viewer(num_rows=3, num_cols=10, width=15, height=3)
viewer.add_row(reconstructed_images[0:10], z_samples[0:10])
viewer.add_row(reconstructed_images[10:20], z_samples[10:20])
viewer.add_row(reconstructed_images[20:30], z_samples[20:30])
viewer.show()
plt.show()
##############################################
# drawing the result - 20x20 uniform samples #
plt.figure(figsize=(12, 12))
plt.scatter(z_points[:, 0],
z_points[:, 1],
cmap='rainbow',
c=y_test,
data_gen = ImageDataGenerator(rescale=1./255., validation_split=0.25)
data_flow = data_gen.flow_from_dataframe(
dataframe = labels, # labels
directory = './data/Cifar-10/train', # path to the directory which contains all the images.
x_col = 'id', # the name of the column which contains the filenames of the images
y_col = 'label', # If class_mode is not 'raw' or not 'input' you should pass the name of the column which contains the class names.
# None, if used for test_generator.
subset = 'training', # This is for the training.
batch_size = 6, # batch size: the number of input data that will be propagated through the network at once
shuffle = True, # to shuffle or not
class_mode = 'categorical', # 'categorical'(default), 'binary', 'sparse', 'input', 'raw', 'other', None
target_size = (32, 32) # image resolution
)
viewer = Viewer(num_rows=5, num_cols=6, width=10, height=10)
for i in range(5):
# method 1
images, labels = data_flow.next()
# method 2
images, labels = next(data_flow)
# method 3
batch = next(data_flow)
images = batch[0]
labels = batch[1]
classes = to_classes(labels, 'CIFAR10')
