The mobile museum guide: Artwork recognition with eigenpaintings and SURF

This paper investigates the performance of eigenpaintings, SURF and a combination of both methods in a query-bypicture system dedicated to artwork images. For this purpose a database containing photographs of 17 artworks was created. These photos were taken by visitors of the exhibition “The VUB Art Collection – On Display and in Your Hand”...

Poly(3-alkylthiophene)s show unexpected second-order nonlinear optical response

Regioregular poly(3-hexylthiophene)s with chain lengths varying from 5 to 100 monomers are synthesized. Poly(3-hexylthiophene)s show in solution an unexpectedly significant second-order nonlinear optical response. The increase in transition dipole moment upon oligomerisation causes the significant second-order nonlinear optical response.