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Related Concept Videos

Color Vision01:24

Color Vision

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Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
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Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

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Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for...
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UV–Vis Spectroscopy of Conjugated Systems01:32

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Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
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Depth Perception and Spatial Vision01:15

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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
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Emission Spectra02:39

Emission Spectra

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When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
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Related Experiment Video

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Applying Hyperspectral Reflectance Imaging to Investigate the Palettes and the Techniques of Painters
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Spectral Color Management in Virtual Reality Scenes.

Francisco Díaz-Barrancas1, Halina Cwierz1, Pedro J Pardo1

  • 1Department of Computer and Network Systems Engineering, University of Extremadura, E06800 Mérida, Spain.

Sensors (Basel, Switzerland)
|October 7, 2020
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Summary

This study introduces a novel color management system to enhance color fidelity in virtual reality (VR) systems. The method improves realism in 3D rendered scenes, crucial for applications like virtual reality visual testing.

Keywords:
Ishihara testcolor fidelityhyperspectral texturesvirtual reality

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Area of Science:

  • Computer Graphics
  • Human-Computer Interaction
  • Color Science

Background:

  • Virtual reality (VR) systems have advanced significantly, yet visual realism, particularly color fidelity, remains a challenge.
  • Accurate color reproduction in real-time 3D rendered virtual scenes is complex due to numerous influencing factors.
  • Existing VR systems often struggle with faithful color representation, impacting user experience and application accuracy.

Purpose of the Study:

  • To introduce a novel color management system designed to improve color fidelity in real-time 3D rendered virtual reality environments.
  • To address the limitations in accurately reproducing colors within virtual scenes.
  • To enhance the visual realism and reliability of virtual reality applications.

Main Methods:

  • Developed a two-level color management system for 3D rendered scenes.
  • Level 1: Applied color management to light sources within the virtual scene.
  • Level 2: Utilized spectral techniques on hyperspectral textures of 3D objects for enhanced color fidelity.

Main Results:

  • The proposed system effectively improves color fidelity in virtual reality.
  • Demonstrated the system's capability by simulating a virtual Ishihara test for color blindness detection.
  • Achieved a higher degree of color accuracy in rendered virtual scenes.

Conclusions:

  • The developed two-level color management system offers a viable solution for enhancing color fidelity in VR.
  • Spectral techniques applied to hyperspectral textures significantly contribute to accurate color reproduction.
  • This method has potential applications in various fields requiring precise color representation, including medical diagnostics.