Viewpoint image generation for head tracking 3D display using multi-camera and approximate depth information

We present a novel concept and first experimental results of a new type of 3D display, which is based on the synthesis of spherical waves. The setup comprises a lens array (LA) with apertures in the millimeter range and a liquid crystal display (LCD) panel. Each pixel of the LCD creates a spherical wave cutout that propagates towards the observer. During the displaying process, the curvature of the spherical waves is dynamically changed by either changing the distance between LA and LCD or by adapting the focal lengths of the lenses. Since the system, similar to holography, seeks to approximate the wavefront of a natural scene, it provides true depth information to the observer and therefore avoids any vergence–accommodation conflict (VAC).

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An Analysis of Depth Information in Depth-Fused 3D Display

The Journal of The Institute of Image Information and Television Engineers ◽

10.3169/itej.68.j165 ◽

2014 ◽

Vol 68 (4) ◽

pp. J165-J168

Author(s):

Ryosuke Saijo ◽

Osamu Watanabe

Keyword(s):

Depth Information ◽

3D Display

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Depth sensitivity investigation on multi-view glasses-free 3D display

Electronic Imaging ◽

10.2352/issn.2470-1173.2020.2.sda-012 ◽

2020 ◽

Vol 2020 (2) ◽

pp. 12-1-12-7

Author(s):

Di Zhang ◽

Xinzhu Sang ◽

Peng Wang

Keyword(s):

Alternative View ◽

Depth Information ◽

Normal Vision ◽

3D Display ◽

Viewing Condition ◽

Display Mode ◽

Test Platform ◽

Stimulus Content ◽

Depth Sensitivity ◽

Random Dot Stereogram

Compared with the 2-view 3D display, the multiview 3D display provides more views to the observers, which allows a stereoscopic perception relatively closer to real viewing condition. Depth sensitivity (DS) on multi-view 3D display has not been investigated with respect to view number and stimulus contents. A lenticular glasses-free 3D display with alternative view numbers (2 views and 28 views) was used as the test platform. Two types of stimulus were implemented for DS investigation, including random dot stereogram (RDS) and contour stereogram (CS). 20 adults (22.8 ±2.1 years old) with normal vision participated in the experiment. Experimental results showed that the DS on 2-view display mode was consistent with that measured with the conventional DS test (t-ratio = 0.2560, P=0.8569). Besides, the DS was significantly better for 28-view display mode, compared with 2- view display mode (t-ratio = 4.326, P<0.0001). For the influence of stimulus type, subjects were able to perceive more precise depth information with the RDS (t-ratio=2.023, P=0.0422), compared with the CS. The proposed investigation indicates that depth perception is closely related to view numbers and stimulus content, the proposed investigation provides essential cues for the choice of view numbers and contents to achieve the desired perception effect.

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Intermediate Image Generation of Stereo Image Using Depth Information and Block-based Matching Method

Journal of Control Automation and Systems Engineering ◽

10.5302/j.icros.2002.8.10.874 ◽

2002 ◽

Vol 8 (10) ◽

pp. 874-880

Keyword(s):

Stereo Image ◽

Depth Information ◽

Image Generation ◽

Matching Method ◽

Intermediate Image ◽

Block Based

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Extended View Angle Integral Imaging 3D Display using Smart Pseudoscopic-to-orthoscopic Conversion with Head Tracking

Imaging and Applied Optics 2016 ◽

10.1364/3d.2016.tw1a.3 ◽

2016 ◽

Author(s):

Xin Shen ◽

Manuel Martinez-Corral ◽

Bahram Javidi

Keyword(s):

Head Tracking ◽

3D Display ◽

Integral Imaging ◽

Extended View

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New Method of Microimages Generation for 3D Display

Sensors ◽

10.3390/s18092805 ◽

2018 ◽

Vol 18 (9) ◽

pp. 2805 ◽

Cited By ~ 1

Author(s):

Nicolò Incardona ◽

Seokmin Hong ◽

Manuel Martínez-Corral ◽

Genaro Saavedra

Keyword(s):

Point Cloud ◽

Depth Map ◽

Microlens Array ◽

Field Of View ◽

New Method ◽

Reference Plane ◽

Depth Information ◽

3D Display ◽

Color Information ◽

At Will

In this paper, we propose a new method for the generation of microimages, which processes real 3D scenes captured with any method that permits the extraction of its depth information. The depth map of the scene, together with its color information, is used to create a point cloud. A set of elemental images of this point cloud is captured synthetically and from it the microimages are computed. The main feature of this method is that the reference plane of displayed images can be set at will, while the empty pixels are avoided. Another advantage of the method is that the center point of displayed images and also their scale and field of view can be set. To show the final results, a 3D InI display prototype is implemented through a tablet and a microlens array. We demonstrate that this new technique overcomes the drawbacks of previous similar ones and provides more flexibility setting the characteristics of the final image.

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