Crop strategy accuracy

1. Download the MSRA Salient Object Database (101MB).
2. Extract each image and its median human-labelled salient region.
3. Generate a test report of percentage deviance of top and left edges for each crop strategy, plus a naive centre gravity crop as "control".

git clone https://github.com/lovell/sharp.git
cd sharp/test/saliency
./download.sh
node report.js
python -m SimpleHTTPServer

The test report will then be available at http://localhost:8000/report.html