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Depth from a Single Image by Harmonizing Overcomplete Local Network Predictions

Copyright (C) 2016, Authors.

This is a reference implementation of the algorithm described in the paper:

Ayan Chakrabarti, Jingyu Shao, and Gregory Shakhnarovich, "Depth from a Single Image by Harmonizing Overcomplete Local Network Predictions," NIPS 2016.

It is being made available for non-commercial research use only. If you find this code useful in your research, please consider citing the paper.

Please see the project page and contact ayanc@ttic.edu with any questions.

Requirements

The top directory contains the inference code. It is entirely in MATLAB and has no external Caffe dependencies.

  1. You can download our trained neural network model weights, available as a .caffemodel.h5 file from the project page.

  2. This implementation requires a modern CUDA-capable high-memory GPU (it has been tested on an NVIDIA Titan X), and a recent version of MATLAB's Parallel Computing Toolbox that supports the GPUArray class.

  3. You will also need to compile the mex function postMAP. With modern versions of MATLAB, this can be done by running mexcuda postMAP.cu. Requires the CUDA toolkit with nvcc to be installed.

Usage

First, you will need to load the network weights from the model file as:

>>> net = load('/path/to/mdepth.caffemodel.h5');

Then given a floating-point RGB image img, normalized to [0,1], estimate the corresponding depth map as:

>>> Z = mdepth(img,net);

Note that we expect img to be of size 561x427, which corresponds to the axis aligned crops in the NYU dataset where there is a valid depth map projection. You can recover these as: img = imgOrig(45:471, 41:601, :).

Training with Caffe

See the training/ directory for code and instructions for training your own network.