Ich trainierte das folgende Netz und speicherte es. Beim Kompilieren des neu geladenen Netzwerks wird der Fehler angezeigt:Keras ValueError beim Kompilieren eines geladenen Modells
ValueError: Error when checkingModelTarget: expected dense_3 to haveFast (None, 1) but got array with shape (10000, 10)
Was kann der Grund sein? Die Lösungen vieler ähnlicher Probleme helfen mir nicht wirklich.
Code:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import numpy
from keras.datasets import mnist
from keras.models import Sequential
from keras.layers import Dense
from keras.layers import Dropout
from keras.layers import Flatten
from keras.layers.convolutional import Convolution2D
from keras.layers.convolutional import MaxPooling2D
from keras.utils import np_utils
from keras import backend as K
from keras.models import model_from_json
K.set_image_dim_ordering('th')
# fix random seed for reproducibility
seed = 7
numpy.random.seed(seed)
# load data
(X_train, y_train), (X_test, y_test) = mnist.load_data()
# reshape to be [samples][pixels][width][height]
X_train = X_train.reshape(X_train.shape[0], 1, 28, 28).astype('float32')
X_test = X_test.reshape(X_test.shape[0], 1, 28, 28).astype('float32')
# normalize inputs from 0-255 to 0-1
X_train = X_train/255
X_test = X_test/255
# one hot encode outputs
y_train = np_utils.to_categorical(y_train)
y_test = np_utils.to_categorical(y_test)
num_classes = y_test.shape[1]
def larger_model():
# create model
model = Sequential()
model.add(Convolution2D(30, 5, 5, border_mode='valid', input_shape=(1, 28, 28), activation='relu'))
model.add(MaxPooling2D(pool_size=(2, 2)))
model.add(Convolution2D(15, 3, 3, activation='relu'))
model.add(MaxPooling2D(pool_size=(2, 2)))
model.add(Dropout(0.2))
model.add(Flatten())
model.add(Dense(128, activation='relu'))
model.add(Dense(50, activation='relu'))
model.add(Dense(num_classes, activation='softmax'))
# Compile model
model.compile(loss='categorical_crossentropy', optimizer='adam', metrics=['accuracy'])
return model
# build the model
model = larger_model()
# Fit the model
model.fit(X_train, y_train, validation_data=(X_test, y_test), epochs=1, batch_size=200, verbose=2)
# Final evaluation of the model
scores = model.evaluate(X_test, y_test, verbose=0)
print("Baseline Error: %.2f%%" % (100-scores[1]*100))
# save model and weights
print("Saving model...")
model_json = model.to_json()
with open('mnist_model.json', 'w') as json_file:
json_file.write(model_json)
model.save_weights("mnist_weights.h5")
print("model saved to disk")
# load model and weights
print("Laoding model...")
with open('mnist_model.json') as json_file:
model_json = json_file.read()
model = model_from_json(model_json)
model.load_weights('mnist_weights.h5')
print("mode loaded from disk")
print("compiling model...")
model.compile(loss='sparse_categorical_crossentropy', optimizer='adam', metrics=['accuracy'])
scores = model.evaluate(X_test, y_test, verbose=0)
print("Baseline Error: %.2f%%" % (100-scores[1]*100))
Es könnte sein, dass Ihre Bildreihenfolge auf TF eingestellt ist und die Eingabeform in Theano-Bildordnung ist und Sie TF als Backend verwenden. –
Könnten Sie 'model.summary()' ausdrucken? –