Article
Biology
David H. Foster, Adam Reeves
Summary: Colour constancy refers to the ability to perceive a surface as having the same colour despite changes in illumination. This study focused on estimating the frequency of constancy failures in natural outdoor environments and found that the estimated colour appearance changed noticeably for a significant portion of the surface area in many scenes. These changes were found to be correlated with the chroma and saturation of the surfaces.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Multidisciplinary Sciences
David H. Foster
Summary: Small changes in daylight can greatly affect the reflected light and limit the visual recognition of surfaces by color. Using information-theoretic methods, it was found that the number of surfaces identifiable by color declines rapidly with the duration of illumination change.
SCIENTIFIC REPORTS
(2021)
Article
Biochemical Research Methods
Jolyon Troscianko, Daniel Osorio
Summary: The color, brightness, and pattern of an object are influenced by its surroundings, and various visual phenomena and illusions have been discovered to highlight these effects. The current explanations for these phenomena range from low-level neural mechanisms to high-level processes incorporating contextual information or prior knowledge. However, quantitative models of color appearance currently cannot account for many of these phenomena. In this study, a model based on the principle of coding efficiency was proposed to predict color appearance. The model successfully fit human behavioral performance and primate retinal ganglion responses, and also accurately predicted over 50 brightness and color phenomena. This suggests that much of color appearance can be attributed to simple mechanisms evolved for efficient coding of natural images, providing a well-founded basis for modeling vision.
PLOS COMPUTATIONAL BIOLOGY
(2023)
Editorial Material
Multidisciplinary Sciences
Alla Katsnelson
Summary: By carefully selecting hues, shapes, and textures, images can be made more accessible and understandable.
Article
Chemistry, Applied
Michela Lecca
Summary: Colour constancy refers to the ability of humans to recognize objects as the same entity even when their colors change due to illumination, and this capability is desirable in computer vision to detect objects regardless of lighting conditions. Machine colour constancy algorithms aim to achieve image representation independent of light changes, but currently available algorithms have limitations and require prior knowledge about image content. Future challenges include developing reliable MCC algorithms for unsupervised operation in various scenarios, and addressing difficulties in choosing the most appropriate MCC procedure for specific applications.
COLORATION TECHNOLOGY
(2021)
Article
Physiology
Semir Zeki
Summary: In this lecture, the author discusses their personal experience and findings on the fundamental issues in color vision since 1973. The discovery of a cortical zone outside the primary visual cortex rich in cells with chromatic properties has greatly influenced the author's views and theories on color vision. This lecture does not provide a comprehensive review but aims to summarize the changes in the author's perspectives.
EXPERIMENTAL PHYSIOLOGY
(2022)
Review
Biology
Eric Warrant, Hema Somanathan
Summary: The ability to see color at night is rare in animals, especially in vertebrates, due to the challenge of achieving sufficient visual signal-to-noise ratio in dim light. However, some insects have unique optical and neural adaptations that enable reliable color vision even in starlight. This provides advantages for nocturnal insects, particularly in discriminating night-opening flowers and may be crucial for nocturnal pollination. However, this vital ecosystem service is threatened by anthropogenic light pollution.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Editorial Material
Biochemistry & Molecular Biology
Heidi Roth, Mathias F. Wernet
Summary: The molecular genetic study of Drosophila color vision circuitry has shown that pathways previously categorized as chromatic versus achromatic actually converge. Dm8 cells with amacrine-like characteristics receive direct and indirect inputs with different spectral sensitivity tuning, forming the second stage of color opponent processing.
Article
Neurosciences
Christoph Witzel, Zoe Flack, Emma Sanchez-Walker, Anna Franklin
Summary: This study investigated the processes of coordination, adaptation, and calibration during the development of colour naming and colour constancy in preschool children. Results showed that illumination changes had a small impact on children's colour categorisation consistency, but the effects of colour term maturity and illumination-specific consistency varied significantly in this age range. The correlation between colour term maturity and illumination specific consistency suggested that colour constancy increased with colour term acquisition, depending on the type of illumination changes.
Article
Neurosciences
Jasper E. Hajonides, Anna C. Nobre, Freek van Ede, Mark G. Stokes
Summary: Recent advances have shown that it is possible to track visual colour processing using Linear Discriminant Analysis on patterns of EEG activity, reflecting sensory qualities, conforming to a parametric coding space, and being possible in multi-item displays. Decoding of visual colour is comparable in magnitude to the decoding of visual stimulus orientation.
Article
Computer Science, Software Engineering
Krzysztof Wolski, Fangcheng Zhong, Karol Myszkowski, Rafal K. Mantiuk
Summary: This paper introduces a model and contrast enhancement algorithm that can improve the accuracy of binocular depth cues under low brightness, allowing high-quality stereoscopic images to be displayed even at very low luminance.
ACM TRANSACTIONS ON GRAPHICS
(2022)
Article
Ecology
Lucy Hayes, Christoph Grueter
Summary: Many bee species exhibit flower constancy, especially social bees that use communication about food sources. A study aimed to understand the benefits of flower constancy in social bees and how these benefits depend on foraging conditions. Results showed that flower constancy alone was not successful, but when combined with communication, it considerably improved the foraging performance of bee colonies, especially in environments with abundant high-quality food sources and weak competition. The findings suggest that flower constancy can be an adaptive strategy in social bees and anthropogenic changes in foraging landscapes may affect bees with different levels of flower constancy differently.
JOURNAL OF ANIMAL ECOLOGY
(2023)
Article
Behavioral Sciences
Laurie J. Mitchell, Fabio Cortesi, N. Justin Marshall, Karen L. Cheney
Summary: Researchers have found that Barrier Reef anemonefish use ultraviolet color patterns to signal submissiveness. Fish with lower ultraviolet skin reflectance are more likely to win in dominance contests, while those with higher reflectance are more likely to lose. Juvenile subordinates benefit by signaling their submissiveness with a naturally higher ultraviolet skin reflectance, which reduces aggression from larger, more-dominant fish and aids with social group integration.
BEHAVIORAL ECOLOGY
(2023)
Article
Psychology, Developmental
Rebecca Wedge-Roberts, Stacey Aston, Ulrik Beierholm, Robert Kentridge, Anya Hurlbert, Marko Nardini, Maria Olkkonen
Summary: This study investigates the differences in color constancy between children and adults. It finds that 6-11-year-old children perform better than adults on a color constancy object selection task, and their performance decreases with age. This may indicate the development of cognitive strategies used to overcome automatic color constancy mechanisms.
DEVELOPMENTAL SCIENCE
(2023)
Article
Ophthalmology
Saif Aldeen AlRyalat, Ruba Muhtaseb, Taher Alshammari
Summary: This study evaluated the accuracy of diagnosing and staging diabetic retinopathy and macular oedema among protonopic, deutronopic and tritanopic ophthalmologists. Results showed that color blindness is associated with lower accuracy in staging diabetic retinopathy and macular oedema, particularly among protonopic graders.
Article
Biology
Shelby E. Temple, Martin J. How, Samuel B. Powell, Viktor Gruev, N. Justin Marshall, Nicholas W. Roberts
Summary: Polarization vision is common in nature, with some marine species, particularly cephalopods, having evolved highly acute discrimination thresholds. Studies have traditionally used artificial sources of polarized light, but this research investigated octopuses' ability to detect polarization contrasts in more ecologically relevant conditions. The study found that the ability to detect polarization contrasts varied consistently with the level of linear polarization, showcasing the functional advantage that these thresholds may confer in behaviorally relevant contexts.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Wen-Sung Chung, Nyoman D. Kurniawan, N. Justin Marshall
Summary: This study compares the neuroanatomy of diurnal and nocturnal coastal and deep-sea octopods, revealing that their habits and habitats are linked to characteristic changes in brain structure. The differences between solitary and social life are reflected in the formation of multiple compartments in the vertical lobe, resembling the cortex of vertebrates.
Article
Biochemistry & Molecular Biology
Daniel Osorio, Francois Menager, Christopher W. Tyler, Anne-Sophie Darmaillacq
Summary: European cuttlefish control the expression of about 30 pattern components to produce a range of body patterns by integrating low-level sensory cues and matching visual features in the background.
Article
Biology
Amy Streets, Hayley England, Justin Marshall
Summary: Stomatopod crustaceans, or mantis shrimps, have a wide range of spectral sensitivity but poor spectral discrimination. They may utilize a different method of color processing, interpreting color as a parallel pattern of photoreceptor activation.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Biology
Naomi F. Green, Emily Guevara, Daniel C. Osorio, John A. Endler, N. Justin Marshall, Misha Vorobyev, Karen L. Cheney
Summary: This study explores the threshold changes in color discrimination for fish species and highlights the importance of considering different factors in color vision models. It provides valuable insights into the nonlinearities of photoreceptors and post-receptoral mechanisms in fish.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Biology
Karen L. Cheney, Jemma Hudson, Fanny de Busserolles, Martin Luehrmann, Abigail Shaughnessy, Cedric van den Berg, Naomi F. Green, N. Justin Marshall, Fabio Cortesi
Summary: Vision is crucial for animals to survive and navigate. This study provides detailed information on the visual system of Picasso triggerfish through behavioral experiments and molecular anatomy. The study reveals that Picasso triggerfish have high visual resolution and express only a subset of visual opsin genes.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Biology
Lily G. Fogg, Fabio Cortesi, David Lecchini, Camille Gache, N. Justin Marshall, Fanny de Busserolles
Summary: This study investigates the visual development of the coral reef fish family using transcriptomics. The results show that the holocentrids are well adapted to photopic conditions initially and invest more in their scotopic visual system as they settle on the reef. By adulthood, they have well-developed scotopic vision and show upregulation of phototransduction genes.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Behavioral Sciences
Laurie J. Mitchell, Fabio Cortesi, N. Justin Marshall, Karen L. Cheney
Summary: Researchers have found that Barrier Reef anemonefish use ultraviolet color patterns to signal submissiveness. Fish with lower ultraviolet skin reflectance are more likely to win in dominance contests, while those with higher reflectance are more likely to lose. Juvenile subordinates benefit by signaling their submissiveness with a naturally higher ultraviolet skin reflectance, which reduces aggression from larger, more-dominant fish and aids with social group integration.
BEHAVIORAL ECOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Lily G. Fogg, Fabio Cortesi, Camille Gache, David Lecchini, N. Justin Marshall, Fanny de Busserolles
Summary: This study investigated the effects of short-term exposure to unnatural light conditions on the retina of juvenile and adult convict surgeonfish. The results showed phenotypic plasticity in the retina, with the most significant changes observed under constant dim light.
Article
Multidisciplinary Sciences
Sian Vincent Venables, Christian Drerup, Samuel B. Powell, N. Justin Marshall, James E. Herbert-Read, Martin J. How
Summary: In shallow water, caustics can hinder visual perception for animals, but some animals have evolved polarization vision to counteract this. This study is the first to demonstrate that polarization vision reduces the negative impacts of dynamic illumination on visual perception.
Article
Biochemistry & Molecular Biology
Sara. M. M. Stieb, Fabio Cortesi, Luiz Jardim de Queiroz, Karen. L. L. Carleton, Ole Seehausen, N. Justin Marshall
Summary: This study investigates the expression of visual pigment gene (opsin) in coral reef fishes and finds that algivorous species with orange/red colors exhibit high expression of long-wavelength-sensitive (lws) opsin. This enhances their ability to detect algae and orange/red-colored conspecifics, possibly enabling social signalling.
Article
Multidisciplinary Sciences
Wen-Sung Chung, Alejandra Lopez-Galan, Nyoman D. Kurniawan, N. Justin Marshall
Summary: This study provides the first detailed description of the neuroanatomical features of a tropical and diurnal cuttlefish and investigates ontogenetic changes in its visual and learning centers. Comparisons with other cuttlefish species are made to construct a connectivity map of the cuttlefish brain. The findings reveal brain anatomy differences and previously unknown neural connections associated with camouflage, motor control, and chemosensory function.
Article
Biochemical Research Methods
Jolyon Troscianko, Daniel Osorio
Summary: The color, brightness, and pattern of an object are influenced by its surroundings, and various visual phenomena and illusions have been discovered to highlight these effects. The current explanations for these phenomena range from low-level neural mechanisms to high-level processes incorporating contextual information or prior knowledge. However, quantitative models of color appearance currently cannot account for many of these phenomena. In this study, a model based on the principle of coding efficiency was proposed to predict color appearance. The model successfully fit human behavioral performance and primate retinal ganglion responses, and also accurately predicted over 50 brightness and color phenomena. This suggests that much of color appearance can be attributed to simple mechanisms evolved for efficient coding of natural images, providing a well-founded basis for modeling vision.
PLOS COMPUTATIONAL BIOLOGY
(2023)
Editorial Material
Environmental Sciences
Donald F. Boesch, Just Cebrian, Vanessa F. Fonseca, Stephen C. Landers, N. Justin Marshall
FRONTIERS IN MARINE SCIENCE
(2023)