This is a tool I created to visualize neural networks in keras.

Heavily inspired by (and functionally inferior to) https://github.com/yosinski/deep-visualization-toolbox

• Runs at approximately 20-30+ fps on various GPUs (My laptop's Quadro M1000M, a Geforce 760, a K40 server (over LAN), 970M on a Macbook Pro)
• Runs at about 0.5-2 FPS on CPU (on an i5 4670k)
• Only 500 lines of code, so you can probably figure out what's going on (it's mostly GUI stuff)
• The interface and neural network stuff are fairly decoupled (A backend for something other than keras could probably be developed in an hour or so at this point)
• Server can be run remotely

• visbox.py - Gui stuff
• networking.py - The server/client stuff
• server.py - Run an example server with VGG16

There are two configuration files: config.yaml - GUI/client options server.yaml - Server (authentication options)

They will be autogenerated if they don't exist, and should be relatively self explanatory.

I'll describe them in more detail at some point.

For CPU only:

conda env create -n visbox-cpu -f environment-win64-cpu.yml

For GPU (less stable)

conda env create -n visbox-gpu -f environment-win64-gpu.yml

conda create --name visbox python=3.5
source activate visbox
pip install git+https://github.com/fchollet/keras.git
conda install pyzmq==16.0.2
conda install numpy scipy h5py pyyaml
conda install -c menpo opencv3
pip install pyqt5
pip install tensorflow # tensorflow-gpu if you have a gpu. You can also use theano.
conda install -c anaconda pyqt=4.11.4

activate visbox
python server.py # The first time you run this it will download the weights for VGG16
python visbox.py # in another terminal/screen/whatever

In the GUI:

• Click "Connect" (you should see the layer names appear at the bottom)
• Click "Webcam" or "Video" to select a video source
• Select a layer you find interesting at the bottom
• Click on a feature in the grid to get a better view

Optional:

• Click ROI to enable a region of interest selector from the video stream
• There is a scroll bar for fastforwarding through a video, that does nothing when you're using a webcam (and probably shouldn't be visible/enabled)
• You can run the server from the GUI, but it's not recommended (especially the first time)

• Server is extremely insecure (no crappy authentication + pickle).
• There are some sketchy "catch Exception" blocks in the code that need to be made more specific
• The features grids need actual grid lines
• Doesn't work with fancy architectures (anything with branching i.e. Resnet)
• I suck at interface design
• ROI selector makes things slow
• None of the cool visualization algorithms are implemented
• Video capture stuff probably shouldn't be happening in the GUI event loop