Light measurement device(LMD) — A device used to measure light, luminance, color, or color temperature. LMDs can include luminance meters, photometers, spectro-radiometers, photodiodes, etc. depending upon the requirements for the measurement.
Designated eye position(DEP) — Locations in space, usually not normal to the center of the screen, for which autostereoscopic displays and some stereoscopic displays are usually designed to obtain the best stereo image quality. (See Figure 6.)
Designated eye position (DEP)
Interpupillary distance(IPD) — The distance between the centers of the two pupils while watching infinity. IPD can range from 55 to 75 millimeters for adults, but the average is usually taken to be 65 mm.
3D luminance—The luminance perceived by a viewer while watching a 3D display with its specific viewing method. Its unit is cd/m2.
3D contrast ratio — The luminance ratio of the full screen white and full screen black perceived by the viewer while watching a 3D display with its specific viewing method. 3D contrast ratio is unit-less.
3D crosstalk — Extra images, seen by a certain eye of the viewer when watching a 3D display, that should not be seen.
System crosstalk—An optical performance of a 3D display (for example, the light leakage caused by the optical component or electronic device, etc.). System crosstalk can be measured by light measurement devices (LMD). System crosstalk is unit-less.
Viewercrosstalk — Viewer crosstalk causes the viewer to see multiple ghost images. The phenomenon of the multiple ghost images comes from a pixel by pixel issue of the local image pair. It can be quantified. In general, viewer crosstalk can be obtained by the product of system crosstalk and co-location image contrast, and reduced by an algorithm of crosstalk cancellation method. Viewer crosstalk is unit-less.
Inter-ocular crosstalk — The 3D crosstalk perceived by a viewer. Inter-ocular crosstalk could come from system crosstalk, viewer crosstalk, the inconsistence of 3D cues, etc. Inter-ocular crosstalk can be called ghost image on 3D display as well. Inter-ocular crosstalk can not be measured by an LMD. Its value should be determined by ergonomic test. Inter-ocular crosstalk is unit-less.
Inter-ocular luminance difference — The luminance difference perceived by the viewer’s eyes, when the viewer watches a 3D display using its specific viewing method and with the same condition of the left/right images.
3D viewing angle — The maximum angle at which a display can be viewed with acceptable stereopsis performance using the 3D display’s specific viewing method. Please refer to Fig.7 for an example of the 3D viewing angle in the horizontal direction.
3D viewing angle in the horizontal direction Symbols :
Related Documents Robert Patterson, “Human factors of 3-D displays”, Journal of the SID 151/11 2007,pp281-291.
Robert Patterson, Alan S. Boydstun, Jason A. Rogers, Lisa M. Tripp, “Stereoscopic Depth Perception and Interocular Luminace Difference”, SID 2009
A. Hanazato, M. Okui, I. Yuyama, “Subjective Evaluation of Cross Talk Disturbance in Stereoscopic Displays”, SID 2000, p288~291.
Kuo-Chung Huang, Kuen Lee, C. H. Tsai, “Measurement of Contrast Ratio for 3D Display”, Proc. of SPIE 4080, Jul. 2000.
Kuo-Chung Huang, Kuen Lee, C. H. Tsai, “A study of how crosstalk affects stereopsis in stereoscopic displays”, Proc. of SPIE Stereoscopic Displays and Virtual Reality Systems X, vol. 5006, pp.247-253, Jan. 2003.
Janusz Konrad, Bertrand Lacotte, Eric Dubois, “Cancellation of Image Crosstalk in Time-Sequential Displays of Stereoscopic Video”, IEEE Transactions on Image Processing, vol. 9, no. 5, May 2000.
James s. Lipscomb, Wayne L. Wooten, “Reducing Crosstalk between Stereoscopic views”, Proc. of SPIE, 1994. vol.2177, pp.92-96.
Kuo-Chung Huang, Chou-Lin Wu, Ching-Chiu Liao and Kuen-Lee, “3D display measurement for DEP”, IMID 2009.
Kuo-Chung Huang, Lang-Chin Lin, Kuen Lee, Hoang-Yan Lin, “The status of 3D display measurement standard”, 3DSA 2009.
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