Dictionary size reduction for a faster object recognition in digital holography

Pattern matching methods can be used in the context of digital holography to perform the task of object recognition, classification and position extraction directly from the hologram and not from the reconstructed optical yield. These approaches exploit the differences between the objects holographic signatures caused by class and depth position of the objects. In this talk we will show that such inter-signature variabilities can be captured efficiently in a lower-dimensional vector space using dimensionality reduction methods.