oleg-trott edited a comment on issue #17684: The output of the ReLU layer in 
MXNET is different from that in tensorflow and cntk
URL: 
https://github.com/apache/incubator-mxnet/issues/17684#issuecomment-592997242
 
 
   @braindotai 
   
   > As given 
[here](https://mxnet.apache.org/api/python/docs/api/gluon/model_zoo/index.html) 
make sure that you are normalizing your image as below
   
   I don't think the normalization is the culprit, if the previous layer 
outputs match. Keras probably uses the same network weights with all backends.
   
   @Justobe 
   
   I don't have the other frameworks installed, so I can't reproduce this, but 
my suggestion is:
   
   check the inputs to `relu`. Since it's a very simple function
   
   ```
   x * (x > 0)
   ```
   
   it should be easy to check that the output is what it's supposed to be. If 
it is not, use the input and output of `conv1_relu` to try to create a 
reproducible case that doesn't need other frameworks.
   

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