Multiprimary color display for liquid crystal display projectors using diffraction grating

Ajito, Takeyuki

doi:10.1117/1.602276

Cited by 26 publications

(7 citation statements)

References 11 publications

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“…[AOYO99] generates multiple narrow primaries by using a diffraction grating and a liquid crystal panel. [RC05] uses three bandpass interference mirrors to disperse light and add an extra yellow channel to an RGB projector to develop a 4-primary projector prototype.…”

Section: Related Workmentioning

confidence: 99%

Content‐Independent Multi‐Spectral Display Using Superimposed Projections

Majumder

et al. 2015

Computer Graphics Forum

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Figure 1: (a) Multi-spectral display system setup with three modified conventional 3-primary projectors, a conventional LCD 3-primary projector for comparison and a high spatial and spectral resolution spectroradiometer (SOC-730 hyperspectral camera) for measurements. (b)The candidate set of 30 primaries used for our prototype, (c) the existing r, g and b filters of the projectors, (d) the 9 filters chosen by our algorithm, (e) the 9-primaries generated by multiplying the r, g and b primaries with the 9 chosen filters. (f) and (g) show the results of our 9-primary multi-spectral display (left) when compared with a conventional 3-primary display (right). AbstractMany works focus on multi-spectral capture and analysis, but multi-spectral display still remains a challenge. Most prior works on multi-primary displays use ad-hoc narrow band primaries that assure a larger color gamut, but cannot assure a good spectral reproduction. Content-dependent spectral analysis is the only way to produce good spectral reproduction, but cannot be applied to general data sets. Wide primaries are better suited for assuring good spectral reproduction due to greater coverage of the spectral range, but have not been explored much. In this paper we explore the use of wide band primaries for accurate spectral reproduction for the first time and present the first content-independent multi-spectral display achieved using superimposed projections with modified wide band primaries. We present a content-independent primary selection method that selects a small set of n primaries from a large set of m candidate primaries where m > n. Our primary selection method chooses primaries with complete coverage of the range of visible wavelength (for good spectral reproduction accuracy), low interdependency (to limit the primaries to a small number) and higher light throughput (for higher light efficiency). Once the primaries are selected, the input values of the different primary channels to generate a desired spectrum are computed using an optimization method that minimizes spectral mismatch while maximizing visual quality. We implement a real prototype of multi-spectral display consisting of 9-primaries using three modified conventional 3-primary projectors, and compare it with a conventional display to demonstrate its superior performance. Experiments show our display is capable of providing large gamut assuring a good visual appearance while displaying any multi-spectral images at a high spectral accuracy.

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Section: Related Workmentioning

confidence: 99%

Content‐Independent Multi‐Spectral Display Using Superimposed Projections

Majumder

et al. 2015

Computer Graphics Forum

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“…Although there were few previous works on 4-primary and 7-primary color displays for larger color gamut [18,19] , the system development and evaluation of muliprimary display had been originally started by NV project. In the projection-type multiprimary display developed in NV, the images from two projectors, each of which is adapted to produce different 3-primary colors, are overlaid on the screen [ Fig.6].…”

Section: Multiprimary Display Systemmentioning

confidence: 99%

High-fidelity video and still-image communication based on spectral information: natural vision system and its applications

et al. 2006

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In addition to the great advancement of high-resolution and large-screen imaging technology, the issue of color is now receiving considerable attention as another aspect than the image resolution. It is difficult to reproduce the original color of subject in conventional imaging systems, and that obstructs the applications of visual communication systems in telemedicine, electronic commerce, and digital museum. To breakthrough the limitation of conventional RGB 3-primary systems, "Natural Vision" project aims at an innovative video and still-image communication technology with highfidelity color reproduction capability, based on spectral information. This paper summarizes the results of NV project including the development of multispectral and multiprimary imaging technologies and the experimental investigations on the applications to medicine, digital archives, electronic commerce, and computer graphics.

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“…Recently, to expand the color gamut of the display devices, multiprimary displays were developed. [2][3][4][5] However, these technologies were either developed for projection displays by using two conventional RGB projectors and six multilayer interference filters 2,3 ͑this method cannot be applied to FPDs͒, or employ the "stripe" layout 5 ͑four subpixels per pixel͒ of which geometric drawbacks are discussed in this paper in terms of CFE.…”

Section: Color Gamutmentioning

confidence: 99%

Subpixel arrangements and color image rendering methods for multiprimary displays

Kutas

Choh

Kwak

et al. 2006

J. Electron. Imaging

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Design principles are formulated to develop visually optimal multiprimary subpixel architectures. Two new hexagonal subpixel architectures optimized for multiprimary color displays are shown, each designed according to these principles. These new multiprimary pixel architectures are considered to be useful to eliminate the color fringe artifact. They are expected to yield images of better visual quality than previous three primary color architectures including the RGB stripe architecture. A new image rendering method is also formulated for multiprimary subpixel architectures. This method can be used with and without subpixel rendering. An error function is defined enabling proper chromaticity reproduction and enhanced luminance resolution.

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Multiprimary color display for liquid crystal display projectors using diffraction grating

Cited by 26 publications

References 11 publications

Content‐Independent Multi‐Spectral Display Using Superimposed Projections

Content‐Independent Multi‐Spectral Display Using Superimposed Projections

High-fidelity video and still-image communication based on spectral information: natural vision system and its applications

Subpixel arrangements and color image rendering methods for multiprimary displays

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