Ich habe this gefolgt, um ein vortrained VGG-Modell zu laden und auszuführen. Ich habe jedoch versucht, Feature-Maps aus ausgeblendeten Layern zu extrahieren und zu versuchen, Ergebnisse aus dem Abschnitt "Extrahieren von beliebigen Feature-Maps" here zu replizieren. Mein Code ist wie folgt:Keras Trained VGG Fehler
#!/usr/bin/python
import matplotlib.pyplot as plt
import theano
from scipy import misc
from PIL import Image
import PIL.ImageOps
from keras.models import Sequential
from keras.layers.core import Flatten, Dense, Dropout
from keras.layers.convolutional import Convolution2D, MaxPooling2D, ZeroPadding2D
from keras.optimizers import SGD
import numpy as np
from keras import backend as K
def get_features(model, layer, X_batch):
get_features = K.function([model.layers[0].input, K.learning_phase()], [model.layers[layer].output,])
features = get_features([X_batch,0])
return features
def VGG_16(weights_path=None):
model = Sequential()
model.add(ZeroPadding2D((1,1),input_shape=(3,224,224)))
model.add(Convolution2D(64, 3, 3, activation='relu'))
model.add(ZeroPadding2D((1,1)))
model.add(Convolution2D(64, 3, 3, activation='relu'))
model.add(MaxPooling2D((2,2), strides=(2,2)))
model.add(ZeroPadding2D((1,1)))
model.add(Convolution2D(128, 3, 3, activation='relu'))
model.add(ZeroPadding2D((1,1)))
model.add(Convolution2D(128, 3, 3, activation='relu'))
model.add(MaxPooling2D((2,2), strides=(2,2)))
model.add(ZeroPadding2D((1,1)))
model.add(Convolution2D(256, 3, 3, activation='relu'))
model.add(ZeroPadding2D((1,1)))
model.add(Convolution2D(256, 3, 3, activation='relu'))
model.add(ZeroPadding2D((1,1)))
model.add(Convolution2D(256, 3, 3, activation='relu'))
model.add(MaxPooling2D((2,2), strides=(2,2)))
model.add(ZeroPadding2D((1,1)))
model.add(Convolution2D(512, 3, 3, activation='relu'))
model.add(ZeroPadding2D((1,1)))
model.add(Convolution2D(512, 3, 3, activation='relu'))
model.add(ZeroPadding2D((1,1)))
model.add(Convolution2D(512, 3, 3, activation='relu'))
model.add(MaxPooling2D((2,2), strides=(2,2)))
model.add(ZeroPadding2D((1,1)))
model.add(Convolution2D(512, 3, 3, activation='relu'))
model.add(ZeroPadding2D((1,1)))
model.add(Convolution2D(512, 3, 3, activation='relu'))
model.add(ZeroPadding2D((1,1)))
model.add(Convolution2D(512, 3, 3, activation='relu'))
model.add(MaxPooling2D((2,2), strides=(2,2)))
model.add(Flatten())
model.add(Dense(4096, activation='relu'))
model.add(Dropout(0.5))
model.add(Dense(4096, activation='relu'))
model.add(Dropout(0.5))
model.add(Dense(1000, activation='softmax'))
if weights_path:
model.load_weights("/home/srilatha/Desktop/Research_intern/vgg16_weights.h5")
return model
if __name__ == "__main__":
#f="/home/srilatha/Desktop/Research_intern/Data_sets/Data_set_2/FGNET/male/007A23.JPG"
f="/home/srilatha/Desktop/Research_intern/Data_sets/Cropped_data_set/1/7.JPG"
image = Image.open(f)
new_width = 224
new_height = 224
im = image.resize((new_width, new_height), Image.ANTIALIAS)
im=np.array(im)
im=np.tile(im[:,:,None],(1,1,3))
#imRGB = np.repeat(im[:, :, np.newaxis], 3, axis=2)
print(im)
#print(type(im))
im = im.transpose((2,0,1))
im = np.expand_dims(im, axis=0)
# Test pretrained model
model = VGG_16('/home/srilatha/Desktop/Research_intern/vgg16_weights.h5')
sgd = SGD(lr=0.1, decay=1e-6, momentum=0.9, nesterov=True)
model.compile(optimizer=sgd, loss='categorical_crossentropy')
out = model.predict(im)
#get_feature = theano.function([model.layers[0].input], model.layers[3].get_output(train=False), allow_input_downcast=False)
#feat = get_feature(im)
#get_activations = theano.function([model.layers[0].input], model.layers[1].get_output(train=False), allow_input_downcast=True)
#activations = get_activations(model, 1, im)
#plt.imshow(activations)
#plt.imshow(im)
features=get_features(model,15,im)
plt.imshow(features[0][13])
#out = model.predict(im)
#plt.plot(out.ravel())
#plt.show()
print np.argmax(out)
Allerdings war ich diesen Fehler:
File "VGG_Keras.py", line 98, in <module>
plt.imshow(features[0][13])
IndexError: index 13 is out of bounds for axis 0 with size 1
Wie kann ich dieses Problem beheben?