Articles tagged with Color
Researchers from Osaka City University found a single kind of opsin in a photoreceptor cell achieves UV and visible light discrimination in the fish pineal organ. This discovery challenges the long-held belief that multiple kinds of color opsins are required for color detection.
Researchers at Johns Hopkins University have successfully grown human retinas in a dish, providing insights into how cells enable color vision. The study found that thyroid hormone plays a crucial role in determining the fate of these cells, with implications for understanding and potentially treating eye diseases.
Researchers used human retinal tissue grown from stem cells to discover how cone photoreceptors develop, leading to insights into eye diseases like color blindness. Thyroid hormone signaling regulated the growth of blue-detecting cones first, followed by red- and green-detecting ones.
A team of researchers has created a systematic method to produce defects with desired optical properties in SiC, enabling its potential use in quantum computing. They discovered three previously unreported signatures and found that producing defects follows a pattern.
New evidence supports the idea that fruits develop eye-catching colors to attract animal dispersers. Fruits eaten by mammals have higher reflectance in the green spectrum, while those dispersed by birds reflect more in the red. The study also found a link between fruit color and environmental factors such as UV light.
Researchers developed a neural-network model that perceives contextual optical illusions like humans, advancing knowledge of human visual system. The model includes feedback connections between neurons, which improve artificial vision by addressing context-dependent weaknesses.
Zebra finches partition hues from red to orange into two discrete categories, similar to human color perception. The birds' ability to distinguish between colors suggests a cognitive shortcut to reduce ambiguity in decision-making.
A team at the University of Washington has developed a sustainable method to remove color from dyes in water using a sponge-like material created from wood pulp and palladium. This process can alter the dye structure and change its color to clear, allowing plants to grow normally again.
Researchers at the University of Cincinnati studied wolf spiders' color vision, finding they are sensitive to green light but don't have a favorite color. Their eyes adapt to changing seasons, allowing them to see contrast against colored backgrounds.
A new study by Cornell University neuroscientists suggests that cognitive bias can be a major obstacle to saving money. The researchers found that people tend to spend more brain power on earning than saving, leading to warped time perception and making it harder to prioritize saving over earning.
Researchers have developed a new approach to invisibility cloaking based on manipulating light frequency, making objects invisible under broadband illumination. This technology could be used for secure data transmissions, sensing, and telecommunications.
Researchers discovered that zebrafish use a near-360 degree view to detect threatening silhouettes in black-and-white and seek out food by detecting UV light scattering. Their unique four-color vision system is unlike any other vertebrate, with half of their neurons dedicated to eyes that are substantial metabolic investments.
A San Francisco State University study reveals that many ethnic minorities are not utilizing US national forests and grasslands, despite living nearby. The research highlights the need for improved outreach and understanding of minority groups' needs to promote sustainable use of these public lands.
A new compression bandage developed by MIT engineers features pressure-sensing photonic fibers that change color in response to pressure. This allows caregivers to gauge the optimal pressure and adjust the bandage accordingly.
A new study found that darker and multicolour clothes are preferred by women with higher BMIs, while men with larger BMIs opt for black or white garments. Clothing size is also closely related to BMI and waist circumference.
Researchers at City, University of London found that colour processing cells in the brain are crucial for interpreting colours in natural images, and that transitions between colours do not significantly contribute to perceived colourfulness. The study's findings support the importance of individual colours in determining what we see.
A new study based on the TV series First Dates found that singles wear more black than red on first dates. Black was associated with increased attractiveness and perceived fashion sense, while red was linked to increased sexual receptivity.
A novel algorithm has been proposed to simulate the color appearance of objects under chromatic illuminants, addressing the fundamental question of human color perception. The algorithm successfully simulated differences in color appearance for #theDress image, which sparked debate over its colors online.
Researchers found that visually-evoked auditory response (vEAR) is more common than other types of synaesthesia, affecting up to 21% of the population. The study suggests a connection between vEAR and physiological factors such as raised cortical excitability in the brain.
A groundbreaking study found that people can correctly identify others' feelings up to 75% of the time by analyzing subtle changes in blood flow color around the nose, eyebrows, cheeks, or chin. Computer algorithms developed from the research accurately recognize human emotion via face color with up to 90% accuracy.
Researchers at Duke University discovered that hogfish sense light with their skin, which differs from eye-based vision. The skin's unique ability allows it to detect changes in brightness or wavelength, such as moving shadows or light fluctuations, enabling the fish to adapt its color pattern accordingly.
Researchers miniaturized dual-frequency combs on a single chip using a single laser, enabling real-time sensing and spectroscopy in field environments. The device can detect a broad range of chemicals with high precision, paving the way for commercialization in the future.
New research by Northeastern University scientists isolates pigment granules from squid skin to create ultra-thin films with rich colors. These materials could be used for adaptive coloration and camouflage applications.
Red-fronted lemurs demonstrate an ability to recognize individuals of their own species from photographs, with females showing a stronger response than males. The animals' capacity for cross-modal recognition suggests that they use both sight and smell to differentiate between conspecifics and heterospecifics.
Researchers develop polymers that can change colors like structural color in nature, enabling smart decorations and anti-counterfeiting measures. The new materials use inkjet printing technology to produce a wide range of colors, including blue, green, orange, and red.
Scientists discovered a complex color vision circuit in mice involving the M5 cell, which may process color information and lead to new treatments for humans. This finding expands our understanding of color vision and its relationship with other types of vision.
Researchers from University of Turku successfully induced a functional analogue of synaesthesia in the brain using hypnosis. The study confirms previous results and shows that hypnosis can rapidly trigger visual hallucinations and induce a form of synaesthesia, offering new insights into cognitive neuroscience.
Researchers have developed a stacked color sensor using perovskites, which improves colour recognition and light sensitivity. This allows for more accurate image capture and enables the creation of smaller pixel sizes, potentially leading to higher spatial resolution in various analysis technologies.
Researchers have found a way to expand the printable color spectrum with a novel nanostructure system that broadens colors while maintaining high resolution. The new silicon nanostructures can print an art piece with a 121% expanded color gamut, higher color saturation and resolution.
A new study compares celebrities from People magazine's World's Most Beautiful lists in 1990 and 2017, revealing increased representation of darker skin types and older age groups. The researchers found that traditional beauty standards are evolving as people become more exposed to diverse cultures and media influences.
A team of scientists has developed a new method for producing non-iridescent, bright structural colors inspired by the iridescence of bird feathers. The process uses a simple one-pot reverse emulsion technique to create supraballs with high color saturation and brightness.
Research across over 100 languages reveals a consistent pattern of language divide towards warmer and cooler colors. The findings suggest that human languages prioritize labeling warm colors consistently due to their prevalence in foreground scenes.
Scientists have made a breakthrough in producing ultra-pure green light for high-resolution displays, exceeding 97-99% of the Rec.2020 standard. The new technology uses simple room-temperature processes and inexpensive materials, paving the way for low-cost industrial production.
Research on Medaka fish reveals dynamic seasonal changes in color perception, with variations in behavior, light response, and gene expression. This phenomenon may not be limited to Medaka and could be widely observed in various animals, including humans.
Researchers at Lomonosov Moscow State University have designed a simple technique to quantify soil color using a low-cost digital device, such as an office scanner. This method reduces errors in soil mapping and organic carbon estimation, increasing accuracy.
Researchers in the Netherlands have created efficient green solar panels using soft imprint lithography, which scatter green light and maintain a 10% power reduction. The technology has potential to widen solar panel use as an architectural design element.
A study found that western fence lizards preferentially flee from dark blue T-shirts over other colors, suggesting they respond to the color itself rather than its detectability. The researchers suggest that this could have implications for animal conservation and ecotourism, where human clothing color may affect animal behavior.
Recent technological advances enable researchers to study animal coloration more comprehensively. The authors of a review article highlight recent progress and set out key questions for the future, shedding light on evolutionary processes and the intricacies of function.
Animals use color in diverse ways, including for reproduction and predator-prey interactions, with species-specific purposes in mind. Mantis shrimp have four times as many colour receptors as humans, allowing them to perceive ultraviolet light.
Scientists at Rice University have created a method for printing and rewriting color images by utilizing structural colors, which are determined by the selective reflections of certain colors at specific angles. The technique uses a single, colorless ink and can generate high-resolution images with excellent durability.
Scientists create user-interactive electronic skin that changes color in response to subtle strain levels, enabling potential uses in robotics, prosthetics, and wearables. Graphene-based flexible electronics make the technology possible with a reduced level of mechanical strain.
Researchers have developed a new technology to create inexpensive full-color 2-D and 3-D holograms that are far more realistic, brighter and can be viewed at wider angles than current holograms. The applications for this technology could be wide-ranging, from currency and identification badges to amusement rides and advertisements.
A Northwestern University study has engineered a cost-effective laser design that outputs multi-color lasing, offering potential benefits in optical fibers, medical imaging, and sensing applications. The new technology allows for stable multi-modal nanoscale lasing with fine control over color and intensity.
Researchers discovered a new mechanism for processing color information in honeybees, which could improve color constancy in imaging systems. The study found that the bees' ocelli contain two color receptors that can detect ambient light color, allowing them to discount naturally colored illumination and perceive true colors.
A recent study published in the Proceedings of the Royal Society Biological Sciences found that humans have a unique type of color vision that excels at detecting socially significant color variation. This ability is crucial for spotting facial color changes, such as blushing, which convey social cues.
Researchers at Hokkaido University developed a gold compound that turns invisible when ground into a fine powder, emitting only infrared light. The substance's unique property has significant implications for bioimaging and the creation of invisible security inks.
Researchers from the University of Exeter used online computer games to test animal camouflage and colour vision. They found that trichromats, like humans, outperformed dichromats in finding camouflaged prey, but dichromats improved faster over time.
A new study reviews EU and US food colouring legislation to find ways to reduce regulatory barriers to international trade. Key findings include differing rules on colour additives, labelling requirements, and natural vs synthetic colours.
A study of 35 popular phone-based sleep apps found that most help users set sleep-related goals and track their sleep patterns, but few provide general information about sleep or its benefits. The analysis suggests that there is room for improvement in the development of these apps to educate users about the importance of sleep.
Researchers found that people who saw 'the dress' in a shadow perceived it as gold and white, while those under artificial light saw it as black and blue. Lifestyle factors such as sleep schedule also influenced color perception.
Researchers found that Japan has unique color terms like 'mizu' and 'kon', while the US uses words like 'teal' and 'lavender'. The study reveals differences in color language between modern societies, highlighting the evolution of color terminology through interaction.
Researchers discovered frogs can distinguish color in extreme darkness, making it crucial for finding escape routes. Frogs use their color vision to select food in low-light conditions, unlike humans.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences have developed the first flat lens that works across a continuous bandwidth of colors, from blue to green. This breakthrough enables new applications in imaging, spectroscopy, and sensing.
Researchers developed a new blue-phase liquid crystal that can enable televisions and computer screens to pack more pixels into the same space while reducing power consumption. The material can achieve a resolution density of up to 1500 pixels per inch, which triples the sharpness of today's TVs.
Researchers develop nonpolluting method to dye textiles with structural colors using 3D colloidal crystals, producing a range of colors that remain bright after washing.
Two groups of jumping spiders, Habronattus and Maratus, have evolved rare color vision to see reds, yellows and oranges. They use different mechanisms, with Habronattus employing a red filter and Maratus relying on ultraviolet, blue and green sensitive cells.
Scientists have traced back 200 million years of eye evolution in turtles and crocodiles, discovering that their adaptations led to the loss of color vision. Turtles developed reduced color vision for freshwater habitats, while crocodiles adapted for dim light.
Researchers found that trichromat females have higher body mass indices and increased infant survival rates among their group members. This suggests a selective advantage for trichromatic females in providing nutrition and care to their offspring during times of food scarcity.
Scientists at KIT replicate nanostructures that produce vibrant colors independent of viewing angle, suitable for textile, packaging and cosmetic industries. The innovation could replace toxic pigments with sustainable alternatives.
A study by SISSA researchers found that our brains use color to guide food choices, with red foods being perceived as more calorie-dense. The visual system's trichromatic nature and evolutionary history support this preference.