This paper presents a wide angle holographic display system with extended viewing angle in both horizontal and vertical directions. The display is constructed from six spatial light modulators (SLM) arranged on a circle and an additional SLM used for spatiotemporal multiplexing and a viewing angle extension in two perpendicular directions. The additional SLM, that is synchronized with the SLMs on the circle is placed in the image space. This method increases effective space bandwidth product of display system data from 12.4 to 50 megapixels. The software solution based on three Nvidia graphic cards is developed and implemented in order to achieve fast and synchronized displaying. The experiments presented for both synthetic and real 3D data prove the possibility to view binocularly having good quality images reconstructed in full FoV of the display.

Visual quality assessment of digital holograms is facing many challenges. Main difficulties are related to the limited spatial resolution and angular field of view of holographic displays in combination with the complexity of steering and operating them for such tasks. Alternatively, non-holographic displays -and in particular light-field displays -can be utilized to visualize the numerically reconstructed content of a digital hologram. However, their suitability as alternative for holographic displays has not been validated. In this research, we have investigated this issue via a set of comprehensive experiments. We used Fourier holographic principle to acquire a diverse set of holograms, which were either computer-generated from point clouds or optically recorded from real macroscopic objects. A final public data set comprising 96 holograms was created using three compression methods which encoded the holograms at four bit-depths. Three separate subjective-tests were conducted using a holographic display, a light field display and a 2D display. For these subjective experiments, a double stimulus, multi-perspective, multi-depth subjective testing methodology was designed and implemented. The tests show that the nonholographic displays indicate a higher sensitivity to artifacts than the holographic display, though at the same time it is demonstrated they are highly correlated. This indicates that the numerically reconstructed holograms rendered on a light field or 2D display have a high predictive value for the perceived quality on holographic display.

Abstract-This paper presents a novel method of multi-spatial light modulator (SLM) holographic image display that enables wide angle reconstruction of images of real world objects. The image data are delivered by means of digital holography. The capture and display systems are arranged in a circular configuration. In order to support the proper information flow between the multi-sensor capture and multi-SLM display systems we perform analysis using the Wigner distribution function. We also consider a mismatch of the capture and display configurations as well as the visual perception of the displayed image. Experimental results based on the reconstruction of real world scenes are presented that demonstrate the validity of the theoretical solutions. A single camera is used to record the digital holograms, where the object is rotated between captures, and these holograms are then displayed on a circular configuration of SLMs. The results show the limitation of multi-SLM holographic displays in terms of visual perception. These problems arise from the limited angular distribution of the SLMs on a display circle and the presence of gaps between the SLMs.

In this paper we present a single SLM color holographic

No abstract