在进行一些特征提取实验时,我注意到 'model.pop()' 功能不像预期的那样工作。 对于像vgg16这样的预训练模型,在使用“model.pop()”后,model.summary()显示该层已被删除(期望的4096个特征),但是通过新模型传递图像时,它会生成与原始模型相同数量的特征(1000)。 无论删除多少层,包括完全空的模型,它都会生成相同的输出。 寻求您的指导,了解可能存在的问题。
#Passing an image through the full vgg16 model
model = VGG16(weights = 'imagenet', include_top = True, input_shape = (224,224,3))
img = image.load_img( 'cat.jpg', target_size=(224,224) )
img = image.img_to_array( img )
img = np.expand_dims( img, axis=0 )
img = preprocess_input( img )
features = model.predict( img )
features = features.flatten()
print(len(features)) #Expected 1000 features corresponding to 1000 imagenet classes
1000
model.layers.pop()
img = image.load_img( 'cat.jpg', target_size=(224,224) )
img = image.img_to_array( img )
img = np.expand_dims( img, axis=0 )
img = preprocess_input( img )
features2 = model.predict( img )
features2 = features2.flatten()
print(len(features2)) #Expected 4096 features, but still getting 1000. Why?
#No matter how many layers are removed, the output is still 1000
1000
谢谢!
在这里查看完整代码:https://github.com/keras-team/keras/files/1592641/bug-feature-extraction.pdf
.pop()
方法,这是唯一有效的解决方案。 - GMSL