LCD masks for spatial augmented reality

Smithwick, Quinn; Reetz, Daniel; Smoot, Lanny

doi:10.1117/12.2035091

Cited by 6 publications

(4 citation statements)

References 1 publication

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“…This is a promising approach and its realization depends on the availability of high frequency (>480 Hz) and highly transparent LCD displays. Smithwick et al built a closely related solution for window-size transparent displays [21].…”

Section: Hardware-based Solutionsmentioning

confidence: 99%

SmartColor: Real-time color correction and contrast for optical see-through head-mounted displays

Hincapié-Ramos

Ivanchuk

Sridharan

et al. 2014

2014 IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

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Users of optical see-through head-mounted displays (OHMD) perceive color as a blend of the display color and the background. Color-blending is a major usability challenge as it leads to loss of color encodings and poor text legibility. Color correction aims at mitigating color blending by producing an alternative color which, when blended with the background, more closely approaches the color originally intended. To date, approaches to color correction do not yield optimal results or do not work in real-time. This paper makes two contributions. First, we present QuickCorrection, a realtime color correction algorithm based on display profiles. We describe the algorithm, measure its accuracy and analyze two implementations for the OpenGL graphics pipeline. Second, we present SmartColor, a middleware for color management of userinterface components in OHMD. SmartColor uses color correction to provide three management strategies: correction, contrast, and show-up-on-contrast. Correction determines the alternate color which best preserves the original color. Contrast determines the color which best warranties text legibility while preserving as much of the original hue. Show-up-on-contrast makes a component visible when a related component does not have enough contrast to be legible. We describe the SmartColor's architecture and illustrate the color strategies for various types of display content.

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Section: Hardware-based Solutionsmentioning

confidence: 99%

SmartColor: Real-time color correction and contrast for optical see-through head-mounted displays

Hincapié-Ramos

Ivanchuk

Sridharan

et al. 2014

2014 IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

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“…By creating a mask pattern of transparency, OST-HMDs generate a black background in the mask area, blocking environment light and providing the occlusion effect. Certain methods use a high-speed switcher to frequently alternate between the virtual content and the real scene, achieving full or partial occlusion [22], [23], [24]. Their approaches, however, usually make the entire solutions impractical for daily use.…”

Section: Related Workmentioning

confidence: 99%

Color Contrast Enhanced Rendering for Optical See-Through Head-Mounted Displays

Zhang

Wang

Peng

et al. 2022

IEEE Trans. Visual. Comput. Graphics

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“…We previously presented a switching dual layer display in which the foreground display contained opaque emissive content on a transparent field, independent of the content on the background display. 10 We rapidly switched between two states: (1) the foreground transparent LCD panel presenting its content with the background display presenting a white field acting as a global backlight and ( 2) the foreground display presenting the content mask with the background display presenting its content. The foreground display's pixels exhibit controllable color, luminance, and opacity but require and depend upon the background display.…”

Section: Temporally Multiplexed Content and Masksmentioning

confidence: 99%

“…This requires transparent displays capable of high frame rates to switch between content and mask without flicker. We previously presented a switching dual layer display in which the foreground display contained opaque emissive content on a transparent field, independent of the content on the background display . We rapidly switched between two states: (1) the foreground transparent LCD panel presenting its content with the background display presenting a white field acting as a global backlight and ( 2) the foreground display presenting the content mask with the background display presenting its content.…”

Section: Introductionmentioning

confidence: 99%

A switched emissive transparent display with controllable per‐pixel opacity

Smithwick

2016

J Soc Info Display

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An emissive transparent display with per-pixel opacity employs rapid synchronized switching of a transparent display and transparent backlight between content with a scattering luminous backlight, and masks with a clear unlit backlight. A 144 fps transparent LCD panel is used in conjunction with a transparent backlight and controllably diffusive smartglass screen. The display is capable of producing opaque emissive content on a transparent field for novel display and compact spatial augmented reality applications.Author Keywords transparent display; opaque; emissive; switching; transparent backlight ObjectiveMany futuristic display concepts from action and sci-fi movies involve transparent displays with colorfully emissive yet opaque content; we have interest in physically creating such displays. Such a display would also be useful in allowing synthetic characters to be placed amongst physical objects a real-world scene, i.e. a compact Pepper's Ghost. In these cases, the ability to control opacity in a transparent display is important, otherwise the content or character would be also appear semi-transparent and low contrast against bright busy background environments.Practical implementation of such a display is difficult since each pixel of such a display would need not only a color, e.g. R: red, G: green, B:blue components, and emissive luminance/brightness, e.g. R,G,B= [0, 1, ... , 255], but also an absorption/opacity, e.g. α= [0,1, ..., 255]. This would be considered a color transparent emissive display with real-world optical alpha (or per-pixel variable transparency). Current displays' pixels control only two out of the three variables. For example, the pixels of a transparent LCD panel vary color and opacity, but not emissive luminance; LCD panels to not generate their own light. Similarly, transparent OLEDs may vary color and luminance, but do not control opacity; OLEDs do not modulate background light. As a result, content displayed on current transparent displays are low-contrast and semi-transparent. We need pixels that can vary in color, luminance and opacity (e.g.RGBα), and the display must be able to accept such four data component signals (or six data component with an independent alpha channel for each color channel). Typical video signals have only three data components (RGB).Since common displays are only able to control two out of the three desired variables of luminance, color and opacity, we temporally multiplex opaque-emissive content (color and luminance) and transparency with absorbing masks (color and transparency). We employ rapid synchronized switching of a transparent LCD display and transparent backlight between displayed content with scattering-luminous backlight, and displayed mask with a transparent -nonluminous backlight states. To implement this scheme, a 120 fps (or greater) transparent LCD panel can be used in conjunction with a variety of transparent backlights. BackgroundWe have previously presented displays which can control each pixel's color, luminance, and opacity...

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LCD masks for spatial augmented reality

Cited by 6 publications

References 1 publication

SmartColor: Real-time color correction and contrast for optical see-through head-mounted displays

SmartColor: Real-time color correction and contrast for optical see-through head-mounted displays

Color Contrast Enhanced Rendering for Optical See-Through Head-Mounted Displays

A switched emissive transparent display with controllable per‐pixel opacity

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