This zip contains the following:

ResizeableImage.py: To be filled in and submitted online.

ImageMatrix.py: Provides various library functions, including
switching between PIL Image and a more accessible format. Also
provides energy function.

test_image.py: unittests for ResizeableImage.py

gui.py: Graphical interface to ResizeableImage.py

sunset_small.png and sunset_full.png: data used in test_image.py.
