A halftoning for paper discussion

Think about what's new in their post?

Original image

                          300 strokes

                         <1700 strokes

<3400 strokes

                           >50000 strokes

Here are some examples from our method.< 12seconds.

Some related pictures

1.http://www.flickr.com/groups/gmic/discuss/72157624425214456/
2.Artistic Sketching with a Painterly Rendering Algorithm
3. Ours????