1 / 22

Fulldome Display Specifications: A Proposal

Fulldome Display Specifications: A Proposal. Ed Lantz President Visual Bandwidth, Inc. ed@visualbandwidth.com. Fulldome Standards Summit L’Hemispheric CIUDAD DE LAS ARTES Y LAS CIENCIAS Valencia, Spain July 7-8, 2004. Fulldome Systems. Single Projector (Fisheye).

dexter
Download Presentation

Fulldome Display Specifications: A Proposal

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fulldome Display Specifications: A Proposal • Ed Lantz • President • Visual Bandwidth, Inc. • ed@visualbandwidth.com Fulldome Standards SummitL’HemisphericCIUDAD DE LAS ARTES Y LAS CIENCIASValencia, SpainJuly 7-8, 2004

  2. Fulldome Systems Single Projector(Fisheye) Multi-Projector Edge-Blended

  3. Edge-Blended Projection Polar Source is Split Into Sub-Frames and Edge-Blended Sub Frame 1 Sub Frame 2 Sub Frame 3 Sub Frame 4

  4. Many Projection Configurations Five Projectors Six Projectors Seven Projectors

  5. Plethora of Projector Technologies • DLP - Digital Light Processor • LCoS - Liquid Crystal on Silicon • CRT - Cathode Ray Tube • Scanned Laser • GLV - Grating Light Valve

  6. IPS Display Specification Standard: Goals • First-cut specifications for displays only • Should expand to include image generator specs • Ultimate spec must be a collaborative effort • Independent of screen diameter & reflectivity • Should be similar to shopping for video projector • System level specifications • We’re interested in what would be measured on dome, not individual projector performance

  7. Brightness Measurements Display Brightness (fL) = Screen Reflectance * Light Output (lumens)/Screen Area (sq. ft.)

  8. Brightness/Color Uniformity Measurements Bpp (%) = (Bmax – Bmin)/Bavg * 100

  9. Blend Uniformity Measurement

  10. Color Uniformity 1931 CIE x,y Chromaticity Diagram Courtesy LEDtronics, Inc.

  11. Color Uniformity and delta E MacAdam ellipses shown on the CIE 1931 (x,y) chromaticity diagram at 10x magnification [Wyszecki 1982]

  12. Color Uniformity - conclusion Do we want to ask our industry to purchase and utilize spectrophotometers? Perhaps not. For now we can be assured of first-order color uniformity by requiring Color Uniformity and Blend Uniformity specifications to hold for all three primary colors in addition to white. This technique makes the assumption that the RGB primaries on all projectors are well matched at the factory.

  13. Resolution

  14. Resolution 50% MTF Requirement for Defining CRT Resolution

  15. Contrast Ratio

  16. Instantaneous Contrast (IPS Test Pattern)

  17. Color Gamut

  18. Frame Rate

  19. Gamma

  20. References [Wyszecki 1982] G. Wyszecki & W.S. Stiles, Color Science: Concepts and Methods, Quantitative Data and Formulae, John Wiley & Sons, New York, 1982 [Halsted 1993] Charles P. Halsted, “Brightness, Luminance, and Confusion,” Society for Information Display, March 1993, http://www.crompton.com/wa3dsp/light/lumin.html

  21. In Planning: SIGGRAPH 2005  Fulldome Venue Los Angeles Convention Center

  22. Please review this spec and provide your feedback for our proceedings!Thank you. • Ed Lantz • President • Visual Bandwidth, Inc. • ed@visualbandwidth.com

More Related