Accelerating network inference over video
Switch branches/tags
Nothing to show
Clone or download
Latest commit ffc53d4 Sep 14, 2017


This is the official project page for the NoScope project.

Please read the blog post and paper for more details!


This repository contains the code for the optimization step in the paper. The inference code is here.

You will need the following installed:

  • python 2.7
  • pip python-setuptools python-tk
  • keras
  • CUDA, CUDNN, tensorflow-gpu
  • OpenCV 3.2 with FFmpeg bindings
  • g++ 5.4 or later

Your machine will need at least:

  • AVX2 capabilities
  • 300+GB of memory
  • 500+GB of space
  • A GPU (this has only been tested with NVIDIA K80 and P100)

Guides on Installing the Requirements

Setting up the inference engine

To set up the inference engine, do the following: Note: It is recommended that you create a folder that contains this repository, the tensorflow-noscope repository, and the data folder referred to below.

git clone
cd tensorflow-noscope
git checkout speedhax
git submodule init
git submodule update
cd tensorflow
bazel build -c opt --copt=-mavx2 --config=cuda noscope

The build will fail. To fix this, update the BUILD file to point towards your OpenCV install and add this directory to your PATH environmental variable. The BUILD file is in the tensorflow-noscope git repository at tensorflow/noscope/BUILD. You will need to change all references to "/lfs/0/ddkang/". You will probably need to change these to "/usr/" if you installed OpenCV using the directions above.

Please encourage the Tensorflow developers to support non-bazel building and linking. Due to a quirk in bazel, it may occasionally "forget" that tensorflow-noscope was built. If this happens, rebuild.

Setting up the optimization engine

To set up the optimization engine, install the NoScope python package by going to the root directory of where you checked out and running "pip install -e ./"

Running the example

Once you have inference engine set up, the example/ subfolder within this repository contains the script to reproduce Figure 5d in the paper.

In order to run this:

  1. Create a folder named data that sits in the same directory as your noscope and tensorflow-noscope folders
  2. Create the following folders within the data folder: videos, csv, cnn-avg, cnn-models, and experiments
  3. Download the coral-reef video and labels, putting the csv file in the csv folder and the mp4 file in the videos folder:
  1. Update the code and data paths in example/ code should point to the folder that contains both the noscope and tensorflow-noscope folders. This value is how the optimization and inference engines find eachother. data should point to the data folder created in this section.
  2. Download the YOLO neural network weights file from It is suggested that you place the file at the location tensorflow-noscope/tensorflow/noscope/darknet/weights/. Note that you will need to make the weights folder.
  3. Update example/ to point to the YOLO configuration and weights files. The config file is tensorflow-noscope/tensorflow/noscope/darknet/cfg/yolo.cfg and the weights file is the one you downloaded. If you put the weights file in the suggested location, this step should be unnecessary.
  4. Run example/ The outputted summary.csv will be in the location data/experiments/$VIDEO_NAME.


The datasets that are currently available are coral-reef-long and jackson-town-square.

The mp4 video files are available at

The CSVs with ground truth labels are available at