This repository contains the code published together with the MIT Intrinsic Images Dataset, see http:https://www.cs.toronto.edu/~rgrosse/intrinsic/. See also:

[1] R. Grosse, M. K. Johnson, E. H. Adelson, and W. T. Freeman.
    Ground truth dataset and baseline evaluations for intrinsic image algorithms.
    Proceedings of the International Conference on Computer Vision (ICCV), 2009.

Below you find the original README of the code.

A command line tool for running the color Retinex algorithm as described in [1] is included (retinex.py).

The code and data are available as separate tarballs:

• http:https://people.csail.mit.edu/rgrosse/intrinsic/intrinsic-code-python.tar.gz
• http:https://people.csail.mit.edu/rgrosse/intrinsic/intrinsic-data.tar.gz

Unpack the tarballs and merge if necessary. The top-level folder, named MIT-intrinsic by default, should contain the README, four python files, the data folder, and two empty results folders.

The four python files are:

• comparison.py: the script for performing hold-one-out cross-validation.
• intrinsic.py: all of the intrinsic image algorithms, along with functions for reading the data and computing the error scores.
• poisson.py: functions for solving the Poisson equation using least-squares or L1.
• html.py: a utility for saving results to HTML.

After installing the required packages (see below), you should be able to reproduce most of the results from the paper by running comparison.py:

cd mit-intrinsic-images python comparison.py

This will evaluate the algorithms using hold-one-out cross-validation. It prints results to the console, and also saves the shading/reflectance decompositions and their error scores to the HTML file results/index.html. If you set the USE_L1 variable (defined in comparison.py) to True, it will use the L1 penalty for reconstruction rather than least squares. In this case, the outputs will be saved to results_L1/index.html.

We have done our best to provide a code base which is readable, compact, and easy to extend.

Please send your questions and comments to Roger Grosse ([email protected]).

To run the code, you will need Python as well as the following Python libraries:

• NumPy (http:https://numpy.scipy.org)
• SciPy (http:https://www.scipy.org)
• PyPNG (Download at http:https://code.google.com/pypng -- documentation at http:https://packages.python.org/pypng/index.html)
• PyAMG (http:https://code.google.com/p/pyamg)

For detailed installation instructions for particular platforms, please see http:https://people.csail.mit.edu/rgrosse/intrinsic/downloads.html

For license information see http:https://www.cs.toronto.edu/~rgrosse/intrinsic/.

For license details of Lenna.png, see http:https://en.wikipedia.org/wiki/Lenna#mediaviewer/File:Lenna.png.