Researcher:
Soomro, Shoaib Rehman

Job Title

PhD Student

First Name

Shoaib Rehman

Last Name

Soomro

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Soomro, Shoaib Rehman

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Now showing 1 - 10 of 12

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Towards mobile 3D telepresence using had-worn devices and dual-purpose screens
(Ieee, 2018) N/A; N/A; N/A; Department of Electrical and Electronics Engineering; Soomro, Shoaib Rehman; 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
Head-mounted displays and augmented reality headsets are emerging as the future of human-computer interaction. Such devices can display high resolution 3D images and use on-board cameras to capture the surroundings of the user. However, capturing the user who is wearing the device to facilitate 3D telepresence is not possible with such headsets. Here we propose and demonstrate a new integrated platform to provide mobile 3D telepresence experience using a head-worn device and a dual-purpose passive screen. At the core of this telepresence architecture, we use a portable multi-layered passive screen which facilitates the stereoscopic 3D display using a pair of head-worn projectors and at the same time, captures the multi-perspective views of the user on a head-worn camera through reflections of the screen. The screen contains retroreflective material for stereo image display and an array of convex mirrors for 3D capture. The 3D telepresence is demonstrated using an experimental setup where a local-user wearing the developed head-worn device perceives the 3D images on the dual-purpose screen, while the captured perspective views of user-1 are rendered as stereo viewpoints and showed to the user-2 on a virtual reality headset.
Metadata only
Next generation augmented reality displays
(IEEE, 2018) N/A; N/A; N/A; N/A; N/A; Department of Electrical and Electronics Engineering; Hedili, M. Kıvanç; Ulusoy, Erdem; Kazempourradi, Seyedmahdi; Soomro, Shoaib Rehman; Ürey, Hakan; Master Student; Researcher; Researcher; PhD Student; Faculty Member; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; N/A; N/A; Graduate School of Sciences and Engineering; College of Engineering; N/A; N/A; N/A; N/A; 8579
Wearable AR/VR displays have a long history and earlier efforts failed due to various limitations. Advances in various sensors, optical technologies, and computing technologies renewed the interest in this area. AR glasses can be the new computing platform and potentially replace smart phones but there are some challenges ahead. We have been working on various wearable display architectures and here we summarize our efforts on laser MEMS scanning displays, head-mounted projectors, and holographic near-eye displays
Open Access
Augmented reality 3d display using head-mounted projectors and transparent retro-reflective screen
(Society of Photo-optical Instrumentation Engineers (SPIE), 2017) Department of Electrical and Electronics Engineering; Soomro, Shoaib Rehman; Ürey, Hakan; Faculty Member; Department of Electrical and Electronics Engineering; College of Engineering; N/A; 8579
A 3D augmented reality display is proposed that can provide glass-free stereo parallax using a highly transparent projection screen. The proposed display is based on a transparent retro-reflective screen and a pair of laser pico projectors placed close to the viewer's head. The retro-reflective screen directs incident light towards its source with little scattering so that each of the viewer's eyes only perceives the content projected by the associated projector. Each projector displays one of the two components (left or right channel) of stereo content. The retro-reflective nature of screen provides high brightness compared to the regular diffused screens. The partially patterned retro-reflective material on clear substrate introduces optical transparency and facilitates the viewer to see the real-world scene on the other side of screen. The working principle and design of the proposed see-through 3D display are presented. A tabletop prototype consisting of an in-house fabricated 60x40cm(2) see-through retro-reflective screen and a pair of 30 lumen pico-projectors with custom 3D printed housings is demonstrated. Geometric calibration between projectors and optimal viewing conditions (eye box size, eye-to-projector distance) are discussed. The display performance is evaluated by measuring the brightness and crosstalk for each eye. The screen provides high brightness (up to 300 cd/ m2 per eye) using 30 lumens mobile projectors while maintaining the 75% screen transparency. The crosstalk between left and right views is measured as < 10% at the optimum distance of 125-175 cm, which is within acceptable range.
Open Access
Retro-reflective characteristics of transparent screen for head mounted projection displays
(Optical Society of America (OSA), 2016) Department of Electrical and Electronics Engineering; Soomro, Shoaib Rehman; Ürey, Hakan; Faculty Member; Department of Electrical and Electronics Engineering; College of Engineering; N/A; 8579
Retro-reflective features of microbeads based transparent screen are explored. Analytical expression of reflection cone is formulated and experimentally validated. Screen luminance for different viewing conditions is calculated when used with HMPD.
Open Access
Wearable augmented reality displays
(Optical Society of America (OSA), 2017) Department of Electrical and Electronics Engineering; Soomro, Shoaib Rehman; Ulusoy, Erdem; Ürey, Hakan; Faculty Member; Department of Electrical and Electronics Engineering; College of Engineering; N/A; 111927; 8579
Wearable augmented reality displays and associated light efficient screens are presented. We review three recent developments in augmented reality displays: head-mounted projection display, retro-reflective augmented reality screen and light efficient 3D augmented reality display.
Open Access
Light-efficient augmented reality 3D display using highly transparent retro-reflective screen
(Optical Society of America (OSA), 2017) Department of Electrical and Electronics Engineering; Ürey, Hakan; Soomro, Shoaib Rehman; Faculty Member; Department of Electrical and Electronics Engineering; College of Engineering; 8579; N/A
We propose and demonstrate a light efficient 3D display using a highly transparent desktop-size augmented reality screen. The display consists of a specially designed transparent retro-reflective screen and a pair of low power pico-projectors positioned close to the viewer’s eyes to provide stereo views. The transfer screen is an optically clear sheet partially patterned with retro-reflective microspheres for high optical gain. The retro-reflective material buried in the screen reflect incident light back towards the projectors with narrow scattering angle and facilitates the viewer to perceive a very bright content. The tabletop prototype mainly consists of an in-house fabricated large AR screen (60x40cm2) and a pair of laser scanning 30 lumen pico-projectors. The display is tested for different viewing configurations, different display parameters such as retro-reflective coefficient, eye-box size, polarization maintainability, stereo crosstalk and brightness. The AR prototype display provides 75% optical transparency, exceptional brightness (up to 1000 cd/m2 when viewed through beam-splitters and 350 cd/m2 with bare eyes) and negligible crosstalk in 3D mode (<5% and <1% when viewed through beam-splitters and polarizers respectively) for the working distance of up to 2 meters.
Open Access
Dual purpose passive screen for simultaneous display and imaging
(Society of Photo-optical Instrumentation Engineers (SPIE), 2017) Department of Electrical and Electronics Engineering; Soomro, Shoaib Rehman; Ulusoy, Erdem; Eralp, Muhsin; Ürey, Hakan; Faculty Member; Department of Electrical and Electronics Engineering; College of Engineering; N/A; 111927; N/A; 8579
Advanced imaging and display techniques are widely explored for realistic content capture and visualization but cannot fully follow the miniaturization and mobility trends in technology. Wide field-of-view displays require large surfaces and image capture requires separate installation of cameras having separate footprints and perspective views. Here we propose a novel, portable dual purpose passive screen that can simultaneously facilitate display and imaging with unprecedented features and performance. The optical design of the screen is presented. A prototype of the dual-purpose screen paired with a camera and a low power mobile projector is demonstrated. The developed screen has size of 28x21cm(2) to facilitate capture of eye contacted perspective view and displays high-quality images with high-brightness (>100cd/m(2)) using only 15 lumen pico projector.
Open Access
Next generation augmented reality displays
(Institute of Electrical and Electronics Engineers (IEEE), 2018) Department of Electrical and Electronics Engineering; Ürey, Hakan; Soomro, Shoaib Rehman; Hedili, M. Kıvanç; Ulusoy, Erdem; Kazempourradi, Seyedmahdi; Faculty Member; Master Student; Department of Electrical and Electronics Engineering; College of Engineering; 8579; N/A; N/A; 111927; N/A
Wearable AR/VR displays have a long history and earlier efforts failed due to various limitations. Advances in various sensors, optical technologies, and computing technologies renewed the interest in this area. AR glasses can be the new computing platform and potentially replace smart phones but there are some challenges ahead. We have been working on various wearable display architectures and here we summarize our efforts on laser MEMS scanning displays, head-mounted projectors, and holographic near-eye displays.
Open Access
Decoupling of real and digital content in projection-based augmented reality systems using time multiplexed image capture
(Society for Imaging Science and Technology (IS_T), 2017) Department of Electrical and Electronics Engineering; Soomro, Shoaib Rehman; Ulusoy, Erdem; Ürey, Hakan; Faculty Member; Department of Electrical and Electronics Engineering; College of Engineering; N/A; 111927; 8579
Projection-based augmented reality systems overlay digital information directly on real objects, while at the same time use cameras to capture the scene information. A common problem with such systems is that cameras see the projected image besides the real objects to some degree. This crosstalk reduces the object detection and digital content registration abilities. The authors propose a novel time sharing-based technique that facilitates the real and digital content decoupling in real time without crosstalk. The proposed technique is based on time sequential operation between a MEMS scanner-based mobile projector and rolling shutter image sensor. A MEMS mirror-based projector scans light beam in raster pattern pixel by pixel and completes full frame projection over a refresh period, while a rolling shutter image sensor sequentially collects scene light row by row. In the proposed technique, the image sensor is synchronized with scanning MEMS mirror and precisely follows the display scanner with a half-period lag to make the displayed content completely invisible for camera. An experimental setup consisting of laser pico projector, an image sensor, and a delay and amplifier circuit is developed. The performance of proposed technique is evaluated by measuring the crosstalk in captured content and sensor exposure limit. The results show 0% crosstalk in captured content up to 8 ms sensor exposure. High capture frame rate (up to 45 fps) is achieved by cyclically triggering a 3.2 MP, 60 fps CMOS sensor and using a 60 Hz pico projector. © 2017 Society for Imaging Science and Technology.
Open Access
Visual acuity response when using the 3D head-up display in the presence of an accommodation-convergence conflict
(Taylor _ Francis, 2019) Department of Electrical and Electronics Engineering; Ürey, Hakan; Soomro, Shoaib Rehman; Faculty Member; Department of Electrical and Electronics Engineering; College of Engineering; Graduate School of Sciences and Engineering; 8579; N/A
Visual discomfort and fatigue due to accommodation-convergence (AC) conflict in stereoscopic displays has been widely reported, but little is known about its impact on visual acuity, particularly when automotive three-dimensional (3D) head-up displays (HUDs) are involved. This paper presents a study on the visual acuity response when an indigenously developed 75% transparent retroreflective screen is used as a windshield 3D HUD. The simulated optical collimation technique was used to provide the virtual content at a farther depth (i.e. on the road while driving). Two user test experiments were performed. The first test was performed under the see-through condition, where the real scene (i.e. roadside view) was perceived through the 3D HUD, while the second test was performed under the simulated collimation condition, where a stereo-collimated virtual content was projected on the HUD at a farther depth. The results showed a slightly declining trend (from 20/20 to 20/25) in visual acuity response when the HUD screen was placed between the viewer and the scene. An inverse relation between the amount of AC conflict and visual acuity was observed under the simulated collimation condition. The >100 cm user-to-screen distance was found to be comfortable, providing the highest acuity response.