Improved viewing resolution of three-dimensional integral imaging by use of nonstationary micro-optics

In this paper, we propose a 3D display method combining a pickup process using axially recorded multiple images and an integral imaging display process. First, we extract the color and depth information of 3D objects for displaying 3D images from axially recorded multiple 2D images. Next, using the extracted depth map and color images, elemental images are computationally synthesized based on a ray mapping model between 3D space and an elemental image plane. Finally, we display 3D images optically by an integral imaging system with a lenslet array. To show the usefulness of the proposed system, we carry out optical experiments for 3D objects and present the experimental results.

Section: Display Of 3d Images In Dpii Systemmentioning

confidence: 99%

“…Integral imaging (II) has been actively researched as one of the next-generation 3D display techniques [1][2][3][4][5][6][7][8][9]. This is due to full parallax, continuous viewing points and full-color 3D images.…”

Section: Introductionmentioning

confidence: 99%

3D Integral Imaging Display using Axially Recorded Multiple Images

Cho

Shin

2013

“…Particularly in integral imaging systems that have been studied for 3-D displays providing autostereoscopic images with full parallaxes, the 2-dimensional (2-D) MLA is an essential optical element to record 3-D information about an object on a charged-couple device (CCD) [8][9] and to display 3-D images. However, with conventional MLAs, which have the same focal length at each elemental lens, the depth of field available for capturing 3-D objects or for displaying 3-D images is highly limited in 3-D integral imaging systems [10][11][12][13]. When we reduce the numerical aperture (NA) of the elemental lens of the MLA to improve the depth of field, the spatial resolution of the integral imaging systems is inevitably degraded.…”

Section: Introductionmentioning

confidence: 99%

Design and Fabrication of Multi-Focusing Microlens Array with Different Numerical Apertures by using Thermal Reflow Method

Park¹,

Lee²,

Park³

et al. 2014

We present design and fabrication of a multi-focusing microlens array (MLA) using a thermal reflow method. To obtain multi-focusing properties with different numerical apertures at the elemental lens of the MLA, double-cylinder photoresist (PR) structures with different diameters were made within the guiding pattern with both photolithographic and partial developing processes. Due to the base PR layer supporting the thermal reflow process and the guiding structure, the thermally reflowed PR structure had different radii of curvatures with lens shapes that could be precisely modeled by the initial volume of the double-cylinder PR structures. Using the PR template, the hexagonally packed multi-focusing MLA was made via the replica molding method, which showed four different focal lengths of 0.9 mm, 1.1 mm, 1.6 mm, and 2.5 mm, and four different numerical apertures of 0.1799, 0.2783, 0.3973, and 0.4775.

“…Some other 3D technologies have been developed, for example stereoscopy [1], autostereoscopy [2], holography [3][4]. Amongst these techniques, integral imaging is an attractive autostereoscopic 3D display technology using a lens array [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. An integral imaging system consists of a pickup and display sections.…”

Section: Introductionmentioning

confidence: 99%

“…Each elemental lens forms a corresponding image of the object, and the elemental images are captured by a charge-coupled device (CCD) camera. However, when we obtain elemental images from real objects in a conventional optical pickup method, there are some disadvantages in using a lens array [5][6][7][8][9][10][11][12][13][14][15][16]. The setup of a lens array and a CCD camera should be placed exactly, and it should prevent unnecessary beams to come into the lens array.…”

Section: Introductionmentioning

confidence: 99%

Simplified Integral Imaging Pickup Method for Real Objects Using a Depth Camera

Shin

Jeong

et al. 2012

In this paper, we present a novel integral imaging pickup method. We extract each pixel's actual depth data from a real object's surface using a depth camera, then generate elemental images based on the depth map. Since the proposed method generates elemental images without a lens array, it has simplified the pickup process and overcome some disadvantages caused by a conventional optical pickup process using a lens array. As a result, we can display a three-dimensional (3D) image in integral imaging. To show the usefulness of the proposed method, an experiment is presented. Though the pickup process has been simplified in the proposed method, the experimental results reveal that it can also display a full motion parallax image the same as the image reconstructed by the conventional method. In addition, if we improve calculation speed, it will be useful in a real-time integral imaging display system.