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Head- and Eye-Tracking Solutions for Autostereoscopic and Holographic 3D Displays

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Handbook of Visual Display Technology

Abstract

Head- and eye-tracked 3D display systems provide glass-free 3D experience while offering a free movement of the observer within the tracking range. In either autostereoscopic or holographic 3D displays, eye-tracking systems are used for following left and right eye position of the observer in real time. Knowing the exact eye positions, the 3D display system provides the proper perspective views to the display user. For autostereoscopic displays these are left and right 2D stereo sub-images, whereas for holographic displays these are left and right holographic 3D reconstruction, respectively. For angular separation of the particular views, special optical light–steering devices are employed. Thus, a fast eye tracking combined with smooth light steering ensures a complete 3D visualization for the user at any time over a wide viewing range.

In this chapter, we first discuss general aspects of video-based eye tracking for their application in 3D displays and present implementations of real-time eye-tracking systems in autostereoscopic and holographic 3D displays. Then an implementation of an eye-tracking system is discussed in detail including the actual hardware and software solutions and achieved performance. Commercially available solutions for eye tracking are evaluated in terms of their specifications and suitability for tracked 3D displays and compared with our system. We then continue with a general description of the optical system required for providing the designated views of a 3D display. Finally, we conclude with a brief summary and offer a perspective on possible future developments of tracked 3D displays.

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Abbreviations

API:

Application Programming Interface

ASD:

Autostereoscopic Display

CPU:

Central Processing Unit

DSP:

Digital Signal Processor

ET:

Eye Tracking

EWOD:

Electrowetting on Dielectrics

FD:

Face Detection

FOV:

Field of View

FPGA:

Field-Programmable Gate Array

HAL:

Hardware Abstraction Layer

IR:

Infrared

LVDS:

Low-Voltage Differential Signaling

MC:

Master Control

OEM:

Original Equipment Manufacturer

PC:

Personal Computer

PCA:

Principal Component Analysis

PHY:

Physical Layer of Ethernet

RAM:

Random-Access Memory

ROI:

Region-Of-Interest

SDK:

Software Development Kit

SRIO:

Serial Variant of RapidIO

SL:

Support Layer

SVM:

Support Vector Machine

VW:

Viewing Window

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Correspondence to Enrico Zschau .

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Zschau, E., Reichelt, S. (2012). Head- and Eye-Tracking Solutions for Autostereoscopic and Holographic 3D Displays. In: Chen, J., Cranton, W., Fihn, M. (eds) Handbook of Visual Display Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-79567-4_114

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