https://www.youtube.com/watch?v=qadw0BRKeMk
https://en.wikipedia.org/wiki/Seam_carving
[1] https://vimeo.com/5024379
[2] https://news.ycombinator.com/item?id=11234793
https://www.youtube.com/watch?v=qadw0BRKeMk
https://en.wikipedia.org/wiki/Seam_carving