Visualising the features in a convolutional neural network

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Sivaramakrishnan Rajaraman
Sivaramakrishnan Rajaraman el 5 de Oct. de 2017
Respondida: Philip Brown el 4 de Mayo de 2023
I’ve been using the matlab example for visualisation of features of a CNN model and visualized the convolutional network layers of all the sequential DL models. With the R2017b release we have the DAG network googLeNet as well. I’m not able to use the available code for sequential models to visualize the features in the googLeNet DAG model. Do we have a way of doing this? Can matlab give me an example for this visualisation?

Respuestas (3)

Javier Pinzón
Javier Pinzón el 16 de Nov. de 2017
Editada: Javier Pinzón el 16 de Nov. de 2017
Hello All
Activations can be see in a DAGNetwork, only the way of write it variesfor the DAG, You need to select the Layer which want to get the activations, and then follow the next lines:
[height1, width1, ~] = size(im);
if isa(net,'DAGNetwork') == 1
featureMap = activations(net, im, 'Relu_conv1');
% The feature map is stored in the first channel
Map1 = featureMap(:, :, 1);
Map1 = imresize(Map1, [height1, width1]);
figure
montage(cat(4,im,...
repmat(Map1*255,[1 1 3])), 'Size', [1 2]);
end
the activation feature map is in the position 1 of the matrix, and you can do that with any of the layers.
Hope it helps and is what you wanted. If any question, you may ask me.
Regards,
Javier
  2 comentarios
Muhammad Arsalan
Muhammad Arsalan el 11 de En. de 2018
Hello,
How can we find the feature like in attached image from a DAGNetwork. The code you provided does not give the color features as attached in attached image by deeDreamImage. or is there any way to use deepDreamImage for DAGNetwork ???
Salma Hassan
Salma Hassan el 11 de Ag. de 2018
i confused with this problem when i visualize the feature by the code in this link https://www.mathworks.com/help/nnet/examples/visualize-features-of-a-convolutional-neural-network.html i get features for alexnet architecture , but I expected features for my dataset which is completely different than alexnet

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keke zhang
keke zhang el 4 de Nov. de 2017
Hi Sivaramakrishnan Rajaraman: I also meet the problem, are you solve it now?
  3 comentarios
keke zhang
keke zhang el 7 de Nov. de 2017
Hi,I am not find other options. It is a pity.
Arun A M
Arun A M el 5 de Sept. de 2020
https://in.mathworks.com/help/deeplearning/ug/visualize-features-of-a-convolutional-neural-network.html

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Philip Brown
Philip Brown el 4 de Mayo de 2023
If you're looking for using the deepDreamImage function for DAGNetwork networks, that's supported from R2019b.

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