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Evaluation of Color Difference Models for Wide Color Gamut and High Dynamic Range.
J Imaging
December 2024
Federal Research Center "Computer Science and Control" of the Russian Academy of Sciences, 119333 Moscow, Russia.
Color difference models (CDMs) are essential for accurate color reproduction in image processing. While CDMs aim to reflect perceived color differences (CDs) from psychophysical data, they remain largely untested in wide color gamut (WCG) and high dynamic range (HDR) contexts, which are underrepresented in current datasets. This gap highlights the need to validate CDMs across WCG and HDR.
View Article and Find Full Text PDFSex differences in the human brain related to visual motion perception.
Biol Sex Differ
November 2024
Department of Neurosurgery of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310029, China.
Article Synopsis
- - Previous research indicates that males can perceive visual motion direction more quickly than females, prompting an investigation into whether the middle temporal visual complex (MT+) is responsible for these differences in perception duration.
- - Using ultra-high field MRI, the study involved 95 participants to assess sex-related variations in brain structure and activity in the MT+ region, revealing that males have larger gray matter volume and enhanced spontaneous activity in the left MT+.
- - The results highlight significant sex differences in brain structure and function, specifically in the MT+ area, which are associated with motion perception abilities, suggesting that these neural characteristics may contribute to the different temporal thresholds for motion discrimination between genders.
The influence of "advancing" and "receding" colors on figure-ground perception under monocular and binocular viewing.
Atten Percept Psychophys
November 2024
Department of Psychology, University of Georgia, Athens, GA, 30602, USA.
Research on figure-ground perception has consistently found that red images are more likely to be perceived as figure/nearer, yet the mechanisms behind this are not completely clear. The primary theories have pointed to optical chromatic aberrations or cortical mechanisms, such as the antagonistic interactions of the magno-/parvocellular (M/P) systems. Our study explored this color-biased figure-ground perception by examining the duration for which a region was perceived as figure under both binocular and monocular conditions, using all combinations of red, blue, green, and gray.
View Article and Find Full Text PDFVisual Acuity Thresholds in Preterm Newborns: An Experimental Study.
Children (Basel)
August 2024
Physiotherapy Departament, Faculdade Ciências da Saúde do Trairi, Universidade Federal do Rio Grande do Norte (UFRN), Santa Cruz 59200-000, Brazil.
Article Synopsis
- Visual acuity is important for neurological development in infants, especially preterm ones in NICUs, as it helps them differentiate shapes and objects.
- A study conducted on 42 preterm infants assessed their visual acuity using specialized cards, finding an average acuity of 0.32 cycles per degree at around 32 weeks of corrected gestational age.
- Results showed no correlation between visual acuity and gestational age, birth weight, or respiratory support, but did reveal that more days of phototherapy were associated with lower visual acuity.
Psychophysics of neon color spreading: Chromatic and temporal factors are not limiting.
Vision Res
October 2024
Department of Psychology, College of Science, Northeastern University, Boston, MA, USA. Electronic address:
Neon color spreading (NCS) is an illusory color phenomenon that provides a dramatic example of surface completion and filling-in. Numerous studies have varied both spatial and temporal aspects of the neon-generating stimulus to explore variations in the strength of the effect. Here, we take a novel, parametric, low-level psychophysical approach to studying NCS in two experiments.
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