keras：连接两个图像作为输入（DeepVO）

Question

I'm trying to implement the model described in this paper.
One item I've having trouble with is setting up the input, which is supposed to be two images stacked, meaning, I have a set of consecutive (i & i+1) images 2048x2048x1 (monochrome), so the input tensor would be 2048x2048x2, but each successive input to the neural net would be the following set of images (i+1 & i+2). So far I have

import numpy as np
from keras.models import Sequential
from keras.layers import Dense, Concatenate, Activation, Conv2D, MaxPooling2D, Flatten, Input
from keras.klayers import Embedding,LSTM 

inp1 = Input((2048,2048,1))
inp2 = Input((2048,2048,1))
deepVO = Sequential()
deepVO.add(Concatenate(inp1,inp2,-1))
deepVO.add(Conv2D(64,(2,2)))
deepVO.add(Activation('relu'))
#....continue to add other layers

The error I get at deepVO_CNN.add(Concatenate(inp1,inp2,-1)) is:

TypeError: __init__() takes from 1 to 2 positional arguments but 4 were given.

Answer 1

像这样尝试 keras api 模式：

import numpy as np
from keras.models import Sequential
from keras.layers import Dense, Activation, Conv2D, MaxPooling2D, Flatten, Input, concatenate

from keras.models import Model

inp1 = Input((2048,2048,1))
inp2 = Input((2048,2048,1))

deepVO = concatenate([inp1, inp2],axis=-1)
deepVO = Conv2D(64,(2,2))(deepVO)
deepVO = Activation('relu')(deepVO)
...

...
outputs = Dense(num_classes, activation='softmax')(deepVO)
deepVO = Model([inp1, inp2], outputs)
#deepVO.summary()