Article
Chemistry, Multidisciplinary
Ningxin Li, Aisha Okmi, Tara Jabegu, Hongkui Zheng, Kuangcai Chen, Alexander Lomashvili, Westley Williams, Diren Maraba, Ivan Kravchenko, Kai Xiao, Kai He, Sidong Lei
Summary: Biomimetic artificial vision is gaining attention, especially in the development of neuromorphic electronic devices, artificial intelligence, and microrobotics. However, the current research lacks color recognition, the most critical vision function, due to the downsizing challenges of existing color sensing devices. In this study, we present a van der Waals semiconductor-enabled vertical color sensing structure that focuses on compact device profile and accurate color recognition capability. Additionally, we introduce chromatic aberration correction to the color sensor hardware, simplifying the design of optical lens systems and further reducing the size of artificial vision systems. The scalability and practical potentials of our developed device architecture are demonstrated by a multiple pixel prototype device in this research.
Article
Optics
Chao Chen, Zonghua Zhang, Feng Gao, Huaiwen Wang
Summary: A flexible correction method is proposed for improving the performance of a color-encoded fringe projection system. The method establishes the relationship between depth information and pixel deviations among color channels using discrete markers and orthogonal fringe patterns on a white plate, and corrects the color-encoded fringe patterns affected by lateral chromatic aberration for three-dimensional reconstruction. Compared to traditional methods, the proposed method is more flexible and convenient.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
Qi Lu, Yifan Ding, Wei Wang, Shijie Liu, Min Xu
Summary: This study designs a superachromat lens that achieves five-color correction in the 600-1600 nm waveband by combining the lens power of three thin lenses. The study derives the lens power combination conditions for the three lenses, introduces a metric to verify the correction, and proposes a method to improve the model's refractive index fitting accuracy. By iterating through ecofriendly glass materials, the study obtains 113 initial structures and selects the optimal structure through optimization. The research provides a theoretical basis and guidance for designing broadband superachromats with more color correction and smaller chromatic focal shift, and develops a broadband interferometer based on these theories.
Article
Chemistry, Analytical
Yuzhuo Zhang, Yaqin Sun, Nan Gao, Zhaozong Meng, Zonghua Zhang
Summary: This study proposed a phase target method based on projector radial chromatic aberration measurement and calibration to improve the color fringing issue in a color fringe projection 3D measurement system. Experimental results showed that the proposed method effectively measured and calibrated the radial chromatic aberration of the projector, leading to improved projection quality.
Article
Optics
Seonyoung Yoon, Youngshin Kwak, Hyosun Kim
Summary: This study systematically investigated the influences of ambient chromaticity, ambient luminance, and display luminance on the perceived neutral point of a display. The results showed that the surround ratio had a greater effect on the display neutral point perception than the absolute intensity of each factor. The perceived display neutral point changed from the adapted white to different neutral points as the surround ratio decreased. In addition, the correlated color temperatures of the perceived display neutral points were also influenced by the ambient lighting conditions.
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
Materials Science, Multidisciplinary
Jingjing Mao, Zhihui Wu, Xinhao Feng
Summary: In this study, a novel method was proposed to correct the chromatic aberration of scanned wood grain and restore the objective color information of real wood grain. The experimental results showed that the correction effectively reduced the color difference between scanned and measured wood grain, providing more accurate color information for wood grain reproductions.
Article
Biochemical Research Methods
Shrilekha Vedhakrishnan, Maria Vinas, Sara Aissati, Susana Marcos
Summary: Visual simulators were used to simulate center-near aspheric multifocal contact lenses (MCLs) of different additions, and the visual performance with simulated MCLs was found to be approximately 20% better than with real MCLs. The study revealed that the profile of MCLs and the interactions with the eye's optics contribute significantly to visual performance.
BIOMEDICAL OPTICS EXPRESS
(2021)
Article
Ophthalmology
Timothy J. Gawne, Rafael Grytz, Thomas T. Norton
Summary: The distribution of short-wavelength sensitive cones in the human eye is sufficient for them to work together with longer wavelength cones to detect defocus and guide emmetropization using chromatic signals. This feature may be an evolutionarily ancient adaptation in many mammalian species.
Article
Optics
J. B. Ohland, Y. Zobus, U. Eisenbarth, B. Zielbauer, D. Reemts, V Bagnoud
Summary: This article revisits the use of off-axis parabolic telescopes in high-intensity laser systems and proposes a suitable setup for fast and repeatable alignment.
Article
Optics
Yue Wang, Jiarui Lei, Jianfeng Zheng, Xulongoi Wang, Miao Cheng, Ming Liu, Junan Zhang, Weibin Chen, Xiaoyao Hu, Weizhong Gu, Shiwei Guo, Xiaobo Hu, Zhigang Gao, Dong Liu
Summary: A microscope requires careful assembly, alignment, and testing due to its complex lenses. Chromatic aberration correction is important but can increase weight and cost. However, this paper proposes an algorithm that shifts some correction tasks to post-processing, achieving higher-quality images without changing hardware or optical parameters.
Article
Optics
Zilong Zhang, Rongsheng Lu
Summary: The dispersion objective is a crucial device for chromatic confocal sensor (CCS), affecting the measurement range and maximum measurement slope. This paper presents two initial structures of dispersion objectives based on doublet lenses for CCS, suitable for large dispersion range and high NA design, respectively. Through categorizing doublet lenses by optical power distribution and glass material distribution, combined with different dispersion types, 36 doublet lens structures were obtained for sensor design optimization. The analysis showed that different dispersion types have varying effects on dispersion range and NA, leading to the construction of two optimal initial structures for different sensor requirements.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Optics
Miao Xu, Yating Liu, Ye Yuan, Hongbo Lu, Longzhen Qiu
Summary: This work demonstrates an adaptive liquid lens using a novel transparent electrically responsive fluid, DBA. The DBA liquid lens with a hemispherical piano-convex shape can change its curvature according to various input voltages. The proposed DBA liquid lens exhibits high optical transmittance, good thermal stability, and excellent imaging property.
Review
Chemistry, Applied
Ralph W. Pridmore
Summary: Complementary colors play significant roles in color appearance and vision, with specific functions categorized into color mixture, color constancy, and color perception.
COLOR RESEARCH AND APPLICATION
(2021)
Article
Ophthalmology
George D. Kymionis, Jaeryung Kim, Myrsini Petrelli, Michael A. Grentzelos, Kattayoon Hashemi, Georges Wagnieres
Summary: The study found that the higher the RI of the IOL, the higher the external surface reflections, with IOLs made of high RI materials having over three times higher reflectivity compared to those with low RI. Ultraviolet or blue light filtering did not show significant correlation with external reflectance.
JOURNAL OF REFRACTIVE SURGERY
(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
Biology
Malin Thyselius, Yuri Ogawa, Richard Leibbrandt, Trevor J. Wardill, Paloma T. Gonzalez-Bellido, Karin Nordstrom
Summary: The ability to observe and pursue small moving objects is crucial for survival in animals. This study used an indoor arena to investigate the pursuit behavior of male E. tenax hoverflies. The findings suggest that these hoverflies do not strictly rely on heuristic rules based on angular size or speed to determine when to start pursuit. The pursuit behavior can be divided into two stages: rapid interception to decrease distance in the first stage, and maintaining proximity without capture in the second stage.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Camilla R. Sharkey, Jorge Blanco, Nathan P. Lord, Trevor J. Wardill
Summary: The evolutionary history of visual genes in beetles is different from other well-studied insect orders. Beetles have lost the commonly conserved short-wavelength (SW) insect opsin gene, but have duplicated the ancestral ultraviolet (UV) and long-wavelength (LW) opsins to expand spectral sensitivity. The jewel beetles, a diverse and colorful family of beetles, have complex spectral sensitivity and use color cues for mate and host detection. This study is the first to test opsin spectral tuning mechanisms in beetles.
MOLECULAR BIOLOGY AND EVOLUTION
(2023)
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)
