我想在像nasnet_mobile这样的预训练模型之前放置一个4层密集网络。我尝试了几种不同的方法,但是它们都给您带来头痛(又名错误)。在有效的keras + tensorflow2中执行此操作的方法是什么?
想法:
我是否需要手动制作一个经过预训练的克隆,并为其加载预训练的权重,然后尝试上述方法之一;也许受过预训练的班级与所创造的班级不同? (更新)如果要复制,是否有一种简单的方法来确保结构相同,以便当我有set_weights(get_weights(…))时不会出错?
以上都不是...
CODE:
#LIBRARIES
import numpy as np
from tensorflow import keras
from tensorflow.keras.models import Sequential, Model
from tensorflow.keras.layers import Dense, Reshape, Conv2D, MaxPool2D , Flatten, Input
my_input_shape = (224,224,3)
#DENSE MODEL
my_inputs = Input(shape=my_input_shape)
hidden_1 = Dense(units=8, activation='relu')(my_inputs)
#make the output layer
hidden_2= Dense(units=np.product(my_input_shape),
activation='sigmoid')(hidden_1)
transformed = keras.layers.Reshape(my_input_shape,)(hidden_2)
dense_model = Model(inputs=my_inputs, outputs=transformed)
#PRETRAINED MODEL
pretrained_model = keras.applications.nasnet.NASNetMobile(weights = 'imagenet',
include_top = False,
input_shape=my_input_shape)
#Option 1
combined_model_1 = keras.applications.nasnet.NASNetMobile(weights = 'imagenet',
include_top = False,
input_tensor=transformed)
#Option 2
combined_model_2 = Model(inputs=dense_model.input, outputs=pretrained_model.output)
#Option 3a
combined_model_3a = keras.applications.nasnet.NASNetMobile(weights = 'imagenet',
include_top = False,
input_tensor=my_input_shape)(dense_model)
#Option 3b
combined_model_3b = keras.applications.nasnet.NASNetMobile(weights = 'imagenet',
include_top = False)(dense_model)
#Option 4
combined_model_4 = keras.applications.nasnet.NASNetMobile(weights = 'imagenet',
include_top = False,
input_tensor=dense_model)
问题:给定上面的代码,我想在预训练模型之前以菊花链方式链接Dense模型。我想将图像送入密集区域,使其在密集区域中传播,然后成为预训练的输入,然后通过预训练。
为什么不这样做:
inp = Input(shape=my_input_shape)
x = dense_model(inp)
x = pretrained_model(x)
final_model = Model(inp, x)