In this paper, we analyze the depth of field (DOF) of integral imaging displays based on wave optics. With considering the diffraction effect, we analyze the intensity distribution of light with multiple micro-lenses and derive a DOF calculation formula for integral imaging display system. We study the variations of DOF values with different system parameters. Experimental results are provided to verify the accuracy of the theoretical analysis. The analyses and experimental results presented in this paper could be beneficial for better understanding and designing of integral imaging displays.

In this paper, we propose a dual-view integral imaging (DVII) three-dimensional (3D) display that presents different 3D images in the left and right viewing directions simultaneously. The DVII 3D display consists of a display panel and a microlens array, and its elemental image array (EIA) is composed of two sub-EIAs. The sub-EIAs captured for two different 3D scenes are responsible for two different 3D images in the left-view and right-view integral imaging 3D displays, respectively. A prototype of the DVII 3D display using a pinhole array is developed, and good results are obtained.

We propose a cross-talk-free integral imaging 3D display based on a pyramid pinhole array. The pyramid pinhole array is used to provide a point light source array. Since the generated point light source array is behind a transmission-type display panel that displays an elemental image array, the pseudoscopic problem can be resolved. By setting the appropriate parameters for the pyramid pinhole array, the cross talk can be eliminated. We experimentally verify the reconstruction of the orthoscopic and cross-talk-free 3D images using the proposed 3D display.

In recent years, various fast imaging algorithms have been developed for near-field millimeter-wave (MMW) sparse multiple-input–multiple-output synthetic aperture radar (MIMO-SAR) system, and most of them are implemented through fast Fourier transform (FFT). However, these algorithms have strict requirements on the uniformity and sparsity of MIMO arrays, and hardly guarantee high-quality image reconstruction under a large dynamic range. This article proposes an efficient MMW image reconstruction algorithm based on alternating direction method of multipliers (ADMM) framework. First, the forward sensing operator is constructed according to the existing FFT-based imaging model. Then we substitute it into the traditional ADMM framework, and at the same time update the iterative solving process, which avoids large-scale matrix inversion and significantly reduces the computational burden. Moreover, in view of the sensitivity of the effective regularization parameter to different imaging scenes and array parameters, a fast and effective regularization parameter selection method is developed in this article by employing image correlation (IC) as the evaluation indicator, which contributes to realize the high-precision and fast reconstruction of the target image to the maximum extent. Finally, a large amount of simulation and experimental results demonstrate the superiority of the proposed algorithm in computational efficiency and imaging quality.

We propose a dual-view integral imaging (DVII) 3D display using polarizer parallax barriers (PPBs). The DVII 3D display consists of a display panel, a microlens array, and two PPBs. The elemental images (EIs) displayed on the left and right half of the display panel are captured from two different 3D scenes, respectively. The lights emitted from two kinds of EIs are modulated by the left and right half of the microlens array to present two different 3D images, respectively. A prototype of the DVII 3D display is developed, and the experimental results agree well with the theory.

In this paper, we propose a tilted elemental image array generation method for computer generated integral imaging display with reduced moiré patterns. The pixels of the tilted elemental image array are divided into border pixels and effective pixels. According to the optimal tilted angle, the effective pixels are arranged with uniform arrangement. Also, a pixel mapping method is proposed. Appropriate experiments are carried out and the experimental results show that not only the color moiré patterns are reduced remarkably, but also the resolution of the reconstructed 3D images are improved through the proposed method.