Integral imaging with improved depth of field by use of amplitude-modulated microlens arrays

Martı́nez-Corral, Manuel; Javidi, Bahram; Martínez‐Cuenca, Raúl; Saavedra, Genaro

doi:10.1364/ao.43.005806

Cited by 126 publications

(66 citation statements)

References 22 publications

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“…With the important advances in optical detectors such as CCD and CMOS technologies, display devices such as Liquid Crystal Devices (LCDs), consumer electronics, and computer hardware, II has been significantly boosted. II has been applied to a wide variety of fields [4,19,24,25,29,30,33,40,41], and it is considered as a promising technology for 3D acquisition and visualisation [1,46].…”

Section: Overview Of 3d Integral Imagingmentioning

confidence: 99%

Depth estimation in Integral Imaging based on a maximum voting strategy

Martínez-Usó

Carmona

Sotoca

et al. 2016

J. Display Technol.

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An approach that uses the scene information acquired by means of a 3D Synthetic Aperture Integral Imaging system is presented. This method generates a depth map of the scene through a voting strategy. In particular, we consider the information given by each camera of the array for each pixel, and also the local information in a neighbourhood of that pixel. The proposed method obtains consistent results for any type of object surfaces as well as very sharp boundaries.In addition, we also contribute in this paper with a repository of a set of synthetic integral images generated by 3DS Max where the so called ground truth (real-true depth map) is available. This resource can be used as a benchmark to test any Integral Imaging based range estimation method.

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Section: Overview Of 3d Integral Imagingmentioning

confidence: 99%

Depth estimation in Integral Imaging based on a maximum voting strategy

Martínez-Usó

Carmona

Sotoca

et al. 2016

J. Display Technol.

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“…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

Journal of the Optical Society of Korea

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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.

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“…Recently, integral imaging (InIm) has been considered one of the effective technologies for next-generation threedimensional (3D) displays [1][2][3][4][5][6][7][8][9][10]. In general, the pickup part of InIm is composed of a lenslet array and a twodimensional (2D) image sensor.…”

Section: Introductionmentioning

confidence: 99%

Viewing Angle-Improved 3D Integral Imaging Display with Eye Tracking Sensor

Hong¹,

Shin²,

Lee³

et al. 2014

Journal of information and communication convergence engineerin

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In this paper, in order to solve the problems of a narrow viewing angle and the flip effect in a three-dimensional (3D) integral imaging display, we propose an improved system by using an eye tracking method based on the Kinect sensor. In the proposed method, we introduce two types of calibration processes. First process is to perform the calibration between two cameras within Kinect sensor to collect specific 3D information. Second process is to use a space calibration for the coordinate conversion between the Kinect sensor and the coordinate system of the display panel. Our calibration processes can provide the improved performance of estimation for 3D position of the observer's eyes and generate elemental images in real-time speed based on the estimated position. To show the usefulness of the proposed method, we implement an integral imaging display system using the eye tracking process based on our calibration processes and carry out the preliminary experiments by measuring the viewing angle and flipping effect for the reconstructed 3D images. The experimental results reveal that the proposed method extended the viewing angles and removed the flipping images compared with the conventional system.

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Integral imaging with improved depth of field by use of amplitude-modulated microlens arrays

Cited by 126 publications

References 22 publications

Depth estimation in Integral Imaging based on a maximum voting strategy

Depth estimation in Integral Imaging based on a maximum voting strategy

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

Viewing Angle-Improved 3D Integral Imaging Display with Eye Tracking Sensor

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