Keras から ResNet50 を微調整したいのですが、最初に同じ入力が与えられた場合、ResNet50 からの予測はモデルの出力とは異なることがわかりました。実際、出力の値は「ランダム」のようです。私は何を間違っていますか?
前もって感謝します!
ここに私のコードがあります:
import tensorflow as tf
from resnet50 import ResNet50
from keras.preprocessing import image
from imagenet_utils import preprocess_input
import numpy as np
from keras import backend as K
img_path = 'images/tennis_ball.jpg'
img = image.load_img(img_path, target_size=(224, 224))
x = image.img_to_array(img)
x = np.expand_dims(x, axis=0)
x_image = preprocess_input(x)
#Basic prediction
model_basic = ResNet50(weights='imagenet', include_top=False)
x_prediction = model_basic.predict(x_image)
#Using tensorflow to obtain the output
input_tensor = tf.placeholder(tf.float32, shape=[None, 224,224, 3], name='input_tensor')
model = ResNet50(weights='imagenet', include_top=False, input_tensor=input_tensor)
x = model.output
# Tensorflow session
session = tf.Session()
session.run(tf.global_variables_initializer())
K.set_session(session)
feed_dict = {input_tensor: x_image, K.learning_phase(): 0}
# Obatin the output given the same input
x_output = session.run(x, feed_dict=feed_dict)
# Different results
print('Value of the prediction: {}'.format(x_prediction))
print('Value of the output: {}'.format(x_output))
ログの例を次に示します。
Value of the prediction: [[[[ 1.26408589e+00 3.91489342e-02 8.43058806e-03 ...,
5.63185453e+00 4.49339962e+00 5.13037841e-04]]]]
Value of the output: [[[[ 2.62883282 2.20199227 9.46755123 ..., 1.24660134 1.98682189
0.63490123]]]]