OpenCV:无法创建类型为“形状”的层“展平1/形状”

我尝试在opencv dnn中实现一个tensorflow模型。这就是我的错误:

OpenCV:无法创建类型为“形状”的层“展平1/形状”

我用keras建立了我的模型

model = Sequential()

model.add(Conv2D(32, (3, 3), input_shape = (32,32,1), activation = 'relu'))

model.add(Conv2D(32, (3, 3), activation = 'relu'))
model.add(MaxPooling2D(pool_size = (2, 2)))
model.add(Dropout(0.25))

model.add(Conv2D(64, (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())#<== this is the layer that opencv doesnt support

model.add(Dense(units = 128, activation = 'relu'))
model.add(Dropout(0.5))
model.add(Dense(units = num_classes, activation = 'softmax'))

我已经试过了 this

from tensorflow.python.keras.layers.core import Reshape

model.add(Reshape((-1,)))

TypeError:添加的层必须是类层的实例。在0x000001D21EF1A630处找到:tensorflow.python.keras.layers.core.reforme对象>

从那里我还没有找到任何解决办法。我的问题是,有没有替代品 Flatten()