我的最后一层不是指定类的数量吗? 什么期望形状为1?
我尝试将预测图像分为4组。我的图层如下:
model = Sequential()
model.add(Conv2D(32, (3, 3), input_shape=(96, 96, 3)))
model.add(Activation('relu'))
model.add(MaxPooling2D(pool_size=(2, 2)))
model.add(Conv2D(32, (3, 3)))
model.add(Activation('relu'))
model.add(MaxPooling2D(pool_size=(2, 2)))
model.add(Conv2D(64, (3, 3)))
model.add(Activation('relu'))
model.add(MaxPooling2D(pool_size=(2, 2)))
# the model so far outputs 3D feature maps (height, width, features)
model.add(Flatten()) # this converts our 3D feature maps to 1D feature vectors
model.add(Dense(64))
model.add(Activation('relu'))
# model.add(Dropout(0.5))
model.add(Dense(4))
model.add(Activation('softmax'))
model.compile(optimizer=tf.train.AdamOptimizer(),
loss='sparse_categorical_crossentropy',
metrics=['accuracy'])
数据类似于:
train_datagen = ImageDataGenerator(
rescale=1./255,
width_shift_range=0.2,
height_shift_range=0.2,
zoom_range=0.2,
horizontal_flip=True,
fill_mode='nearest')