Engineering

Engineers design color-changing compression bandage

Compression therapy is a standard form of treatment for patients who suffer from venous ulcers and other conditions in which veins struggle to return blood from the lower extremities. Compression stockings and bandages, wrapped ...

Engineering

Changing the color of 3-D printed objects

3-D printing has come a long way since the first "rapid prototyping" patent was rejected in 1980. We've evolved from basic designs to a wide range of highly-customizable objects. Still, there's a big issue: once objects are ...

Energy & Green Tech

Nanoparticles give solar panels a green color

Researchers from AMOLF, the University of Amsterdam (UvA) and the Energy research Centre of the Netherlands (ECN) have developed a technology to create efficient bright green colored solar panels. Arrays of silicon nanoparticles ...

Computer Sciences

Attractive names of paint colors as delivered by a neural network

x(Tech Xplore)—Many people walking through the paint department of a store will be thinking of just that, picking up some paint with names like Comfy Cabbage or Sand Dune and getting out. If you are Janelle Shane, though, ...

Engineering

Medically monitoring premature babies with cameras

Researchers at EPFL and CSEM have developed a contactless and wireless camera system to continuously monitor the vital signs of premature babies. This system could replace skin sensors, which cause false alarms nearly 90% ...

Computer Sciences

Double filters allow for tetrachromatic vision in humans

(Tech Xplore)—A team of researchers at the University of Wisconsin has developed a pair of glasses that allows the wearer to have tetrachromatic vision. In their paper uploaded to the arXiv preprint sever, the group describes ...

Engineering

Tattoo-like skin health monitor needs no batteries

(Tech Xplore)—An international team of researchers has developed an ultra-thin health monitoring device that affixes to the skin like a patch and looks somewhat like a tattoo. As they note in their paper published in the ...

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Color

Color or colour (see spelling differences) is the visual perceptual property corresponding in humans to the categories called red, green, blue and others. Color derives from the spectrum of light (distribution of light power versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors. Color categories and physical specifications of color are also associated with objects, materials, light sources, etc., based on their physical properties such as light absorption, reflection, or emission spectra. By defining a color space, colors can be identified numerically by their coordinates.

Because perception of color stems from the varying spectral sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance.

The science of color is sometimes called chromatics, colorimetry, or simply color science. It includes the perception of color by the human eye and brain, the origin of color in materials, color theory in art, and the physics of electromagnetic radiation in the visible range (that is, what we commonly refer to simply as light).

This text uses material from Wikipedia, licensed under CC BY-SA