Comprehensive Performance Analysis of Objective Quality Metrics for Digital Holography
 
Comprehensive Performance Analysis of Objective Quality Metrics for Digital Holography ■
 
Ayyoub Ahar, Ayyoub Ahar, Ayyoub Ahar, Tobias Birnbaum, Tobias Birnbaum, Tobias Birnbaum, Maksymilian Chlipala, Maksymilian Chlipala, Maksymilian Chlipala, Weronika Zaperty, Weronika Zaperty, Weronika Zaperty, Saeed Mahmoudpour, Saeed Mahmoudpour, Saeed Mahmoudpour, Tomasz Kozacki, Tomasz Kozacki, Tomasz Kozacki, Malgorzata Kujawinska, Malgorzata Kujawinska, Malgorzata Kujawinska, Peter Schelkens, Peter Schelkens, Peter Schelkens
 
Abstract ■

Objective quality assessment of digital holograms has proven to be a challenging task. While prediction of perceptual quality of the recorded 3D content from the holographic wavefield is an open problem; perceptual quality assessment from content after rendering, requires a time-consuming rendering step and a multitude of possible viewports. In this research, we use 96 Fourier holograms of the recently released HoloDB database to evaluate the performance of well-known and state-of-the-art image quality metrics on digital holograms. We compare the reference holograms with their distorted versions: (i) before rendering on the real and imaginary parts of the quantized complex-wavefield, (ii) after converting Fourier to Fresnel holograms, (iii) after rendering, on the quantized amplitude of the reconstructed data, and (iv) after subsequently removing speckle noise using a Wiener filter. For every experimental track, the quality metric predictions are compared to the Mean Opinion Scores (MOS) gathered on a 2D screen, light field display and a holographic display. Additionally, a statistical analysis of the results and a discussion on the performance of the metrics are presented. The tests demonstrate that while for each test track a few quality metrics present a highly correlated performance compared to the multiple sets of available MOS, none of them demonstrates a consistently high-performance across all four test-tracks.