We have received hundreds of emails asking for the source code ranging from practitioners, students, researchers up to top companies. The range of proposed projects is exciting and it shows that TLD is ready to push the current technology forward. This shows that we have created something "bigger" than originally expected and therefore we are going to postpone the release of our source code until announced otherwise. Thank you for understanding.
http://info.ee.surrey.ac.uk/Personal/Z.Kalal/tld.html
However as most of the tracking code is in Matlab - i.e. you can't just port this to your phone - I don't think the author has a great deal to lose here. If someone wants to re-implement the algorithms they may well need his expertise. (Edit: Looking at the code in more detail SammoJ may well be right, and this paragraph may be wrong.)
In fact, Henrik Abelsson may have more to lose if this is seen as poor etiquette, but I'm speculating here.