Researcher:
Akşit, Kaan

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PhD Student

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Kaan

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Akşit

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Akşit, Kaan

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2011 - 201518

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Researcher Of Publications: search.filters.isAuthorOfPublication.6c42199d-a466-4b46-a4ad-9d89a280925a

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Now showing 1 - 10 of 18
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    Light engine and optics for HELIUM3D auto-stereoscopic laser scanning display
    (IEEE, 2011) Willman, Eero; Baghsiahi, Hadi; Day, Sally E.; Selviah, David R.; Fernandez, F. Anibal; N/A; Department of Electrical and Electronics Engineering; N/A; Department of Electrical and Electronics Engineering; Department of Electrical and Electronics Engineering; Akşit, Kaan; Ölçer, Selim; Erden, Erdem; Chellappan, Kishore Velichappattu; Ürey, Hakan; PhD Student; Other; Master Student; Researcher; Faculty Member; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; College of Engineering; Graduate School of Sciences and Engineering; College of Engineering; College of Engineering; N/A; N/A; N/A; N/A; 8579
    This paper presents a laser-based auto-stereoscopic 3D display technique and a prototype utilizing a dual projector light engine. The solution described is able to form dynamic exit pupils under the control of a multi-user head-tracker. A prototype completed recently is able to provide a glasses-free solution for a single user at a fixed position. At the end of the prototyping phase it is expected to enable a multiple user interface with an integration of the pupil tracker and the spatial light modulator.
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    Head-worn mixed reality projection display application
    (Association for Computing Machinery, 2014) Kade, Daniel; N/A; Department of Media and Visual Arts; Department of Electrical and Electronics Engineering; Akşit, Kaan; Özcan, Oğuzhan; Ürey, Hakan; PhD Student; Faculty Member; Faculty Member; Department of Media and Visual Arts; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; College of Social Sciences and Humanities; College of Engineering; N/A; 12532; 8579
    The main goal of this research is to develop a mixed reality (MR) application to support motion capture actors. This application allows seeing and exploring a digital environment without occluding the actor's visual field. A prototype is built by combining a retro-reflective screen covering surrounding walls and a headband consisting of a laser scanning projector with a smartphone. Built-in sensors of a smartphone provide navigation capabilities in the digital world. The integrated system has some unique advantages, which are collectively demonstrated for the first time: (i) providing fixed field-ofview (50o in diagonal), fixed retinal images at full-resolution, and distortion-free images that are independent of the screen distance and shape; (ii) presenting different perspectives to the users as they move around or tilt their heads, (iii) allowing a focus-free and calibration-free display even on non-flat surfaces using laser scanning technology, (iv) enabling multiple users to share the same screen without crosstalk due to the use of retro-reflectors, and (v) producing high brightness pictures with a projector of only 15 lm; due to a high-gain retro-reflective screen. We demonstrated a lightweight, comfortable to wear and low cost head-mounted projection display (HMPD) which acts as a stand-a-lone mobile system. Initial informal functionality tests have been successfully performed. The prototype can also be used as a 3D stereo system using the same hardware by additionally mounting polarized glasses and an active polarization rotator, while maintaining all of the advantages listed above.
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    Super stereoscopy 3D glasses for more realistic 3D vision
    (IEEE Computer Society, 2014) N/A; N/A; N/A; Department of Electrical and Electronics Engineering; Akşit, Kaan; Niaki, Amir Hossein Ghanbari; Eldeş, Osman; Ürey, Hakan; PhD Student; Master Student; Master Student; Faculty Member; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; N/A; N/A; 8579
    This paper introduces a new major twist on stereoscopic displays, where users suffer less from the accommodation-vergence conflict with the help of improved monocular parallax. Our method provides two different views to each eye by using special apertures equipped with color filters. The design can be embedded into conventional stereoscopic glasses or special contact lenses. Subjective tests verified that the accommodation-vergence conflict is avoided to a large degree. The technique is also applicable to multi-view 3DTV displays in general.
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    Novel 3D displays using micro-optics and MEMS
    (Ieee, 2012) Department of Electrical and Electronics Engineering; N/A; N/A; Ürey, Hakan; Akşit, Kaan; Eldeş, Osman; Faculty Member; PhD Student; Master Student; Department of Electrical and Electronics Engineering; College of Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; 8579; N/A; N/A
    A portable projector can be built using a MEMS raaster scanner and laser light sources. Three recently developed technologies are reviewed: mixed-polarization based stereoscopic display, Gabor superlens based autostereoscopic display, and interaction using retroreflectors.
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    MEMS scanners and emerging 3D and interactive Augmented Reality display applications
    (Institute of Electrical and Electronics Engineers (IEEE), 2013) Department of Electrical and Electronics Engineering; Department of Electrical and Electronics Engineering; N/A; N/A; N/A; N/A; Ürey, Hakan; Holmstrom, Sven; Baran, Utku; Akşit, Kaan; Hedili, M. Kıvanç; Eldeş, Osman; Faculty Member; Researcher; Master Student; PhD Student; Master Student; Master Student; Department of Electrical and Electronics Engineering; College of Engineering; College of Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; 8579; N/A; N/A; N/A; N/A; N/A
    MEMS scanners have advanced rapidly during the last 20 years thanks to the excellent mechanical and optical properties offered by silicon. They have been used in various display and imaging products. The performance of high resolution and high frequency MEMS laser scanners is close to meeting the demands of full HD displays (120 million pixels per second). Important performance metrics and the performance of various electromagnetic, electrostatic, and piezoelectric actuated MEMS scanners developed in our group are reviewed and recent improvements in the piezoelectric actuated resonant MEMS scanner is presented. Second part of the paper is about some of the emerging 3D and interactive Augmented-Reality display applications enabled by pico-projectors using MEMS scanners. Those technologies are expected to play an important role in the future of human-computer interface.
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    Paper no 15.1: augmented reality and 3D displays using pico-projectors
    (Blackwell Publishing, 2013) N/A; N/A; N/A; Department of Electrical and Electronics Engineering; Akşit, Kaan; Eldeş, Osman; Hedili, M. Kıvanç; Ürey, Hakan; PhD Student; Master Student; Master Student; Faculty Member; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; N/A; N/A; 8579
    Pico-projectors based on ME MS scanners and RGB lasers provide a powerful platform for not only mobile projectors but also for various 3D display architectures and augmented reality. First part of the paper discusses two recently developed 3D display techniques: a stereoscopic display using only one pico-projector passive polarized glasses and an autostereoscopic multiuser multiview display using an array of pico-projectors. Second part of the paper discusses various augmented reality applications enabled by a pico-projector and a special micro-optical screen. Those technologies can be expected to play an important role in the future of human-computer interface.
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    Improved 3D with super stereoscopy technique
    (Blackwell Publishing, 2014) N/A; N/A; Department of Electrical and Electronics Engineering; Akşit, Kaan; Niaki, Amir Hossein Ghanbari; Ürey, Hakan; PhD Student; Master Student; Faculty Member; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; N/A; 8579
    This paper introduces a new major milestone on stereoscopic displays, where users no longer suffer from the accommodation-vergence conflict problem with a perfected monocular parallax. Our method provides multiple views to a single eye by using special apertures equipped with filters in front of the user's eyes in which the design is embedded into conventional stereoscopic glasses or special stereoscopic contact lenses. Thus, visual fatigue originated from accommodation-vergence conflict is avoided. Through informal subjective tests, we have shown that the depth perception, accommodation, and vergence of the eyes can be enhanced. The technique is also capable of converting multi-view displays to Super Multi-View (SMV) displays.
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    Single and multi-user head tracked glasses-free 3D displays
    (IEEE, 2013) Surman, Phil; Day, Sally; Benjamin, Joshua; Jain, Kuber; Chen, Hao; N/A; Department of Electrical and Electronics Engineering; Akşit, Kaan; Ürey, Hakan; PhD Student; Faculty Member; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; 8579
    This paper describes two head tracked displays; both provide glasses-free 3D (autostereoscopic) to viewers by producing pairs of exit pupils where the left and right stereo images are directed to the appropriate viewers' eyes under the control of a head tracker. The first display is single viewer where exit pupils are formed by a pair of picoprojectors whose position moves in accordance with the viewer's head position. Light is reflected back to the viewer's eyes using a retroreflecting screen. The second display is multi-user and is laser-based. A Gabor superlens screen is scanned with a vertical illumination column that acts as the backlight for a direct-view liquid crystal display (LCD). The emergent beam directions are controlled by a spatial light modulator (SLM) such that they land on the viewers' left and right eyes alternately. For each display the principle of operation, the display hardware and the results are presented here.
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    Head-mounted mixed reality projection display for games production and entertainment
    (Springer London Ltd, 2015) Kade, Daniel; N/A; Department of Electrical and Electronics Engineering; Department of Media and Visual Arts; Akşit, Kaan; Ürey, Hakan; Özcan, Oğuzhan; PhD Student; Faculty Member; Faculty Member; Department of Electrical and Electronics Engineering; Department of Media and Visual Arts; KU Arçelik Research Center for Creative Industries (KUAR) / KU Arçelik Yaratıcı Endüstriler Uygulama ve Araştırma Merkezi (KUAR); Graduate School of Sciences and Engineering; College of Engineering; College of Social Sciences and Humanities; N/A; 8579; 12532
    This research presents a mixed reality (MR) application that is designed to be usable during a motion capture shoot and supports actors with their task to perform. Through our application, we allow seeing and exploring a digital environment without occluding an actor's field of vision. A prototype was built by combining a retroreflective screen covering surrounding walls and a headband consisting of a laser scanning projector with a smartphone. Built-in sensors of a smartphone provide navigation capabilities in the digital world. The presented system was demonstrated in an initially published paper. Here, we extend these research results with our advances and discuss the potential use of our prototype in gaming and entertainment applications. To explore this potential use case, we built a gaming application using our MR prototype and tested it with 45 participants. In these tests, we use head movements as rather unconventional game controls. According to the performed user tests and their feedback, our prototype shows a potential to be used for gaming applications as well. Therefore, our MR prototype could become of special interest because the prototype is lightweight, allows for freedom of movement and is a low-cost, stand-alone mobile system. Moreover, the prototype also allows for 3D vision by mounting additional hardware.
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    Portable 3D laser projector using mixed polarization technique
    (Ieee-Inst Electrical Electronics Engineers Inc, 2012) Viswanathan, Selvan; Freeman, Mark O.; N/A; N/A; Department of Electrical and Electronics Engineering; Akşit, Kaan; Eldeş, Osman; Ürey, Hakan; PhD Student; Master Student; Faculty Member; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; N/A; 8579
    This paper introduces a new twist on stereoscopic displays-one that has similarities to existing methods in that it utilizes both polarization and color to present different stereo 3D perspectives to each eye, but by combining the use of polarization and color, it avoids weaknesses associated with previous methods. This new method is named Mixed Polarization 3D. Color imbalance artifacts associated with anaglyph methods of 3D are avoided by alternating the colors presented to each eye. Flicker, associated with polarization-sequential 3D, or the need to increase the frame rate to at least 120 Hz to avoid this perceived flicker, is avoided in mixed polarization 3D by presenting both eyes with 3D information in every single frame. It is particularly aimed at use in scanned laser projectors where all three primary colors (R, G, B) are already polarized and simultaneously displayed. Like other polarization-based approaches, it requires the use of a polarization-preserving screen and inexpensive passive polarization glasses. The 3D display needs just a single handheld mobile projector coupled with an active polarization rotator, thus the image registration problems with two projectors is avoided.