Swedish leaf is a set of leaf outlines donated by Oskar Söderkvist,
and used in his MSc thesis <em> Computer vision classifcation of leaves from swedish trees</em>, 2001.

The tree classes are
1. Ulmus carpinifolia
2. Acer
3. Salix aurita
4. Quercus
5. Alnus incana
6. Betula pubescens
7. Salix alba 'Sericea'
8. Populus tremula
9. Ulmus glabra
10. Sorbus aucuparia
11. Salix sinerea
12. Populus
13.Tilia
14. Sorbus intermedia
15. Fagus silvatica
