Digital holography is an imaging technique with great potential, that allows the acquisition and the reproduction of the entire wavefield of light. A big challenge in this field is the development of efficient coding tools, due to the different hologram data characteristics compared to standard multimedia content. This work presents an experimental comparison between two different coding techniques: the well-known hologram plane coding and the less-investigated object plane coding. In order to identify advantages and limitations of each method, but also to determine if the object plane coding could be an effective alternative to the more simple hologram plane coding, different types of holograms are employed, analyzing and discussing the obtained results.
Holography is an acquisition and reproduction technique of visual content which allows, theoretically, for the reconstruction of the acquired scene without any difference with its real-world counterpart. The objective quality assessment of digital holograms coding tools is a very challenging problem because the signal properties of holograms are significantly different from those of regular images. Several approaches can be devised for holography compression and objective quality evaluation. The exploratory study presented in this paper aims at assessing a procedure for objective quality evaluation of data compression tools when applied to the hologram plane.