我有麻烦申请的数据，扩充当培训的模式。 具体关于使用 fit_generator() 方法。
我最初运行模式成功地在不增加使用 适合() 方法，然而根据 其他人 ，它是建议使用 fit_generator(). 这似乎是这两种方法需要同样的输入时涉及到的图像和标签，但是我得到的以下 错误 时运行的代码如下：
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/tmp/ipykernel_35/139227558.py in <module>
105
106 # train the network
--> 107 model.fit_generator(aug.flow(train_ds, batch_size=batch_size),
108 validation_data=val_ds, steps_per_epoch=len(train_ds[0]) // batch_size,
109 epochs=epochs)
/opt/conda/lib/python3.7/site-packages/keras/preprocessing/image.py in flow(self, x, y, batch_size, shuffle, sample_weight, seed, save_to_dir, save_prefix, save_format, subset)
894 save_prefix=save_prefix,
895 save_format=save_format,
--> 896 subset=subset)
897
898 def flow_from_directory(self,
/opt/conda/lib/python3.7/site-packages/keras/preprocessing/image.py in __init__(self, x, y, image_data_generator, batch_size, shuffle, sample_weight, seed, data_format, save_to_dir, save_prefix, save_format, subset, dtype)
472 save_format=save_format,
473 subset=subset,
--> 474 **kwargs)
475
476
/opt/conda/lib/python3.7/site-packages/keras_preprocessing/image/numpy_array_iterator.py in __init__(self, x, y, image_data_generator, batch_size, shuffle, sample_weight, seed, data_format, save_to_dir, save_prefix, save_format, subset, dtype)
119 y = y[split_idx:]
120
--> 121 self.x = np.asarray(x, dtype=self.dtype)
122 self.x_misc = x_misc
123 if self.x.ndim != 4:
/opt/conda/lib/python3.7/site-packages/numpy/core/_asarray.py in asarray(a, dtype, order)
81
82 """
---> 83 return array(a, dtype, copy=False, order=order)
84
85
TypeError: float() argument must be a string or a number, not 'BatchDataset'
我已经完成了谷歌在试图解决的 类型错误:float()参数必须是一串或一个数字，而不是'BatchDataset' 错误，但无济于事。 有人建议，为向前迈进？
import pathlib
import tensorflow as tf
from tensorflow import keras
from tensorflow.keras import layers
from tensorflow.keras.models import Sequential
import matplotlib.pyplot as plt
# Set data directory
data_dir = pathlib.Path("../input/validatedweaponsv6/images/")
# Set image size
img_height = 120
img_width = 120
# Hyperparameters
batch_size = 128
epochs = 50
learning_rate = 0.001
# Create the training dataset
train_ds = tf.keras.utils.image_dataset_from_directory(
data_dir,
label_mode='categorical',
validation_split=0.2,
subset="training",
shuffle=True,
seed=123,
image_size=(img_height, img_width),
batch_size=batch_size)
# Create the validation dataset
val_ds = tf.keras.utils.image_dataset_from_directory(
data_dir,
label_mode='categorical',
validation_split=0.2,
subset="validation",
shuffle=True,
seed=123,
image_size=(img_height, img_width),
batch_size=batch_size)
# Create sequential model
model = Sequential([
# Preprocessing
layers.Rescaling(1./127.5, offset=-1,
input_shape=(img_height, img_width, 3)),
# Encoder
layers.Conv2D(8, 3, activation='relu'),
layers.MaxPooling2D(),
layers.Conv2D(16, 3, activation='relu'),
layers.MaxPooling2D(),
layers.Conv2D(32, 3, activation='relu'),
# layers.Conv2D(2, 3, activation='relu'), ???
layers.Flatten(),
# Decoder
layers.Dense(64, activation='relu'),
layers.Dropout(0.5),
layers.Dense(2, activation='softmax')
])
# Print the model to see the different output shapes
print(model.summary())
# Compile model
model.compile(loss='categorical_crossentropy',
optimizer=keras.optimizers.SGD(learning_rate=learning_rate), metrics=['accuracy'])
# construct the training image generator for data augmentation
aug = tf.keras.preprocessing.image.ImageDataGenerator(rotation_range=20, zoom_range=0.15,
width_shift_range=0.2, height_shift_range=0.2, shear_range=0.15,
horizontal_flip=True, fill_mode="nearest")
# train the network
model.fit_generator(aug.flow(train_ds, batch_size=batch_size),
validation_data=val_ds, steps_per_epoch=len(train_ds[0]) // batch_size,
epochs=epochs)
# Print scores
score = model.evaluate(train_ds, verbose=0)
print('Validation loss:', score[0])
print('Validation accuracy:', score[1])
# Show loss and accuracy models
show_history(history)
谢谢你看我的岗位! :)