Article
Neurosciences
Ippei Negishi, Keizo Shinomori
Summary: The study revealed that color in a visual scene affects luminance contrast perception, with lower saturation colors having a stronger suppressive effect on luminance-driven brain activity. This effect was observed throughout the visual cortices, indicating that color information impacts luminance information processing from early to later visual areas.
FRONTIERS IN NEUROSCIENCE
(2021)
Article
Computer Science, Hardware & Architecture
Francesco Leccese, Michele Rocca, Giacomo Salvadori, Merve Oner, Chiara Burattini, Fabio Bisegna
Summary: This study analyzed 57 laptop displays in terms of luminance, luminance ratio, and contrast non-uniformity. The results showed significant luminance variability among different displays, with most meeting requirements but some not meeting recommended luminance ratios. Researchers also developed a simplified graph for rapid evaluation of display performance.
Article
Psychology
Zhicheng Lin, Qi Ma, Yang Zhang
Summary: Studies in vision, psychology, and neuroscience often require precise measurements of luminance and color in visual stimuli presented on digital screens. However, traditional equipment for such measurements is expensive and difficult to use. In this study, researchers introduce an open-source software package called PsyCalibrator, which utilizes consumer hardware to make luminance/color measurement and gamma calibration accessible and flexible. Validation results demonstrate that the measurements obtained using PsyCalibrator show excellent accuracy and low variances compared to professional, high-cost photometers.
ADVANCES IN METHODS AND PRACTICES IN PSYCHOLOGICAL SCIENCE
(2023)
Article
Neurosciences
Christopher DiMattina
Summary: The study found that observers are more sensitive to luminance differences defined by textures compared to uniform luminance steps. When segmenting natural texture boundaries, the presence of masking step boundaries had little effect on segmentation performance. This suggests that the visual system contains mechanisms well suited to detecting surface boundaries that are robust to interference from luminance differences arising from luminance steps like those formed by cast shadows.
Article
Green & Sustainable Science & Technology
Alexandru Viorel Rusu, Catalin Daniel Galatanu, Gheorghe Livint, Dorin Dumitru Lucache
Summary: The main quality concern in street lighting is the luminance distribution, and the standard BS EN 13201-3 specifies the calculation of average luminance for observers in the center of each lane. This paper proposes a solution for measuring average luminance from outside the carriageway, validated through simulations and field measurements. The study found that different lighting arrangements may require different measurement methods, and a correction function was proposed for cases where differences in measurements were found.
Article
Optics
Garimagai Borjigin, Hideki Kakeya
Summary: A novel autostereoscopic display using inclined interleaved linear Fresnel lens arrays is designed and evaluated, providing different high-resolution stereoscopic image pairs to two viewers simultaneously through time-division quadruplexing. The lens array's inclination enlarges the viewing zone horizontally, enabling two viewers to have specific views without interference. This allows for direct manipulation style interaction and collaboration while maintaining eye contact, without the need for special goggles.
Article
Optics
Patrick Candry, Patrick De Visschere, Kristian Neyts
Summary: A new line element for a 3-dimensional Riemannian color space is developed, which takes into account both the first and second stage of color vision based on psychophysical color discrimination models. The line element is expressed in a contrast space and incorporates visual adaptation effects. It demonstrates better overall predictability of threshold ellipsoids compared to other color difference metrics.
Article
Psychology, Mathematical
Daiichiro Kuroki
Summary: This study introduces a new jsPsych plugin for setting different onset times for stimuli and evaluates the synchronization with display refresh. Results show reduced variability across browser-computer combinations with the plugin, but a relatively large variability in SOAs between visual and audio stimuli.
BEHAVIOR RESEARCH METHODS
(2021)
Article
Construction & Building Technology
Daniel Bishop, J. Geoffrey Chase
Summary: This study introduces a low-cost custom luminance imaging device that can provide comparable accuracy and performance to higher-cost technologies, reducing the cost barrier for luminance imaging and improving lighting design and practices.
Article
Energy & Fuels
Ignacio Garcia, Carlos Saenz, Begona Hernandez, Rafael Garcia, Jose Luis Torres
Summary: A full sky High Dynamic Range imaging system based on a Single-Lens Reflex camera with a fisheye lens was constructed and calibrated using a sky scanner luminance meter. With calibration data sets obtained under stable sky conditions, the system achieved high accuracy and precision in luminance estimation. The study also demonstrated the effectiveness of using a Spectrally Matched Luminance (SML) predictor for improved results.
Article
Optics
Shuo Cao, Haowen Ma, Chao Li, Ruyi Zhou, Yutong Sun, Jingnan Li, Juan Liu
Summary: This paper proposes a method that utilizes a dual neural network model to address the challenges posed by aberration in the integral imaging microlens array (MLA) and the degradation of 3D image quality. The proposed method achieves high-quality integral imaging 3D display by effectively correcting MLA aberration and enhancing image quality.
Article
Materials Science, Multidisciplinary
Yingqi Ren, Yang Guo, Yao Cheng, Yaoqing Chu, Yongzheng Fang, Yufeng Liu, Jingshan Hou, Zhifu Liu
Summary: This paper introduces a SiO2-PC-ETPTA-based e-ink that achieves electrophoresis-driven modulation of structural color with the addition of rGO. It improves coloration, ink rheology, and electrochromic response time, which is significant for e-ink design in reflective displays.
Article
Engineering, Electrical & Electronic
Yiming Huang, Haisong Xu, Zhengnan Ye, Yuemin Li, Minhang Yang, Weige Lv
Summary: This paper proposes a content independent luminance and detail enhancement method for HDR images, which significantly improves the perceptual quality of images under ambient illumination.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY
(2023)
Article
Optics
Chao Chen, Xiuguo Chen, Zhongwen Xia, Jiacheng Shi, Sheng Sheng, Wen Qiao, Shiyuan Liu
Summary: In this study, a self-designed imaging Mueller matrix ellipsometer (IMME) was proposed for the characterization of pixelated nanogratings in 3D displays. The experimental results showed that the measurement data obtained by IMME matched well with theoretical results, and the extracted structural parameters and orientations were consistent with SEM measurement results.
Article
Engineering, Civil
Haofeng Hu, Shuping Xu, Yazhuo Zhao, Hongyi Chen, Shiyao Yang, Hedong Liu, Jingsheng Zhai, Xiaobo Li
Summary: In this article, an effective underwater image enhancement method is introduced to improve image quality by correcting color distortion, enhancing contrast, and enriching details. The method classifies underwater images into no-color-cast and color-cast images, and applies adaptive color correction approaches for different color shifts. Luminance information is enhanced and details are enriched, followed by the fusion of corrected color information to output improved quality images.
IEEE JOURNAL OF OCEANIC ENGINEERING
(2023)