3D light-field display with an increased viewing angle and optimized viewpoint distribution based on a ladder compound lenticular lens unit

Abstract

Three-dimensional (3D) light-field displays (LFDs) suffer from a narrow viewing angle, limited depth range, and low spatial information capacity, which limit their diversified application. Because the number of pixels used to construct 3D spatial information is limited, increasing the viewing angle reduces the viewpoint density, which degrades the 3D performance. A solution based on a holographic functional screen (HFS) and a ladder-compound lenticular lens unit (LC-LLU) is proposed to increase the viewing angle while optimizing the viewpoint utilization. The LC-LLU and HFS are used to create 160 non-uniformly distributed viewpoints with low crosstalk, which increases the viewpoint density in the middle viewing zone and provides clear monocular depth cues. The corresponding coding method is presented as well. The optimized compound lenticular lens array can balance between suppressing aberration and improving displayed quality. The simulations and experiments show that the proposed 3D LFD can present natural 3D images with the right perception and occlusion relationship within a 65° viewing angle.

Camera Animation for Immersive Light Field Imaging

“…The most recent works on LF visualization include novel display systems such as the Aktina Vision [27], the aforementioned LF LED wall [6], one solution with a spacemultiplexed voxel screen [28] and one with a ladder-compound lenticular lens unit (LC-LLU) [29]; various camera systems [30][31][32]; compression methods [33][34][35]; view synthesis [36][37][38]; reconstruction [39][40][41]; objective quality assessment [42][43][44]; subjective studies [45][46][47]; and the advances of JPEG pleno [48]. Regarding LF QoE, while the vast majority of the scientific literature focuses on perceptual thresholds and personal preference [49][50][51][52][53][54], the research questions of future works will address immersion, interaction, human-computer interface (HCI), inter-user effects, perceptual fatigue, super resolution, and many more [55].…”

Learning-based light field imaging: an overview

“…The light field market is rapidly expanding, with an increased focus on glasses-free displays. Pioneering 160 • horizontal viewing angle displays [2] discretize light field data into many spaced views, providing 3D experience for many spectators at the same time. Light fields can be captured by an array of monocular cameras (rather than a single Mahmoudpour et camera), by a plenoptic camera [3], or be computer-generated.…”

Global Evaluation and Optimization for a Directionally Illuminated Autostereoscopy

“…However, the measured points on the screen are scarce to estimate the luminance uniformity and crosstalk which can be distributed unevenly on the entire screen [32]. In practice, optimizing viewing zone distribution is an effective way to improve the performance of AS3D, such as manipulating dot/linear/rectangular hybrid-shaped views [33], sub-pixel rendering [11], dynamic fusion of viewing zone [34], and ladder compound lenticular lens unit [35]. Therefore, establishing a more holistic, or global characterization in the entire viewing zone is necessary and important to provide a guideline for AS3D design, optimization, and manufacturing.…”

“…Simultaneously, the other eye should receive a completely dark image. However, in practice, various factors, such as non-ideal steep viewing zones [32] and optical 2 > REPLACE THIS LINE WITH YOUR MANUSCRIPT ID NUMBER (DOUBLE-CLICK HERE TO EDIT) < imperfection [35] can affect the luminance distribution on the screen, leading to light energy leakage between different channels. This compromises uniformity and gives rise to crosstalk.…”