The steps to convert a TensorFlow PrefetchDataset into a format that can be used with ImageDataGenerator to perform data augmentation are:
tf.data
module:dataset = tf.data.Dataset.from_tensor_slices((x_train, y_train))
train_dataset = dataset.take(train_size).shuffle(buffer_size=train_size).batch(batch_size).prefetch(buffer_size=-1)
val_dataset = dataset.skip(train_size).shuffle(buffer_size=val_size).batch(batch_size).prefetch(buffer_size=-1)
data_generator = ImageDataGenerator(
rotation_range=15,
width_shift_range=0.1,
height_shift_range=0.1,
shear_range=0.1,
zoom_range=0.1,
horizontal_flip=True,
rescale=1./255
)
flow_from_dataset
method of the ImageDataGenerator instance to convert the training and validation datasets into a format that can be used for data augmentation:train_generator = data_generator.flow_from_dataset(
train_dataset,
target_size=(img_height, img_width),
batch_size=batch_size,
class_mode='categorical'
)
val_generator = data_generator.flow_from_dataset(
val_dataset,
target_size=(img_height, img_width),
batch_size=batch_size,
class_mode='categorical'
)
model.fit(train_generator, epochs=num_epochs, validation_data=val_generator)
Note: The specific arguments passed to the ImageDataGenerator and flowfromdataset methods may differ depending on the specific requirements of the project.
Asked: 2022-12-11 11:00:00 +0000
Seen: 9 times
Last updated: May 10 '21