Abstract:
:The variation between the actual and perceived lightness of a stimulus has strong dependency on its background, a phenomena commonly known as lightness induction in the literature of visual neuroscience and psychology. For instance, a gray patch may perceptually appear to be darker in a background while it looks brighter when the background is reversed. In the literature it is further reported that such variation can take place in two possible ways. In case of stimulus like the Simultaneous Brightness Contrast (SBC), the apparent lightness changes in the direction opposite to that of the background lightness, a phenomenon often referred to as lightness contrast, while in the others like neon colour spreading or checkerboard illusion it occurs opposite to that, and known as lightness assimilation. The White's illusion is a typical one which according to many, does not completely conform to any of these two processes. This paper presents the result of quantification of the perceptual strength of the White's illusion as a function of the width of the background square grating as well as the length of the gray patch. A linear filter model is further proposed to simulate the possible neurophysiological phenomena responsible for this particular visual experience. The model assumes that for the White's illusion, where the edges are strong and quite a few, i.e., the spectrum is rich in high frequency components, the inhibitory surround in the classical Difference-of-Gaussians (DoG) filter gets suppressed, and the filter essentially reduces to an adaptive scale Gaussian kernel that brings about lightness assimilation. The linear filter model with a Gaussian kernel is used to simulate the White's illusion phenomena with wide variation of spatial frequency of the background grating as well as the length of the gray patch. The appropriateness of the model is presented through simulation results, which are highly tuned to the present as well as earlier psychometric results.
journal_name
PeerJjournal_title
PeerJauthors
Mitra S,Mazumdar D,Ghosh K,Bhaumik Kdoi
10.7717/peerj.5626subject
Has Abstractpub_date
2018-09-25 00:00:00pages
e5626issn
2167-8359pii
5626journal_volume
6pub_type
杂志文章相关文献
PeerJ文献大全abstract::We present a new supertree method that enables rapid estimation of a summary tree on the scale of millions of leaves. This supertree method summarizes a collection of input phylogenies and an input taxonomy. We introduce formal goals and criteria for such a supertree to satisfy in order to transparently and justifiabl...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.3058
更新日期:2017-03-01 00:00:00
abstract::The active place avoidance task is a dry-arena task used to assess spatial navigation and memory in rodents. In this task, a subject is put on a rotating circular arena and avoids an invisible sector that is stable in relation to the room. Rotation of the arena means that the subject's avoidance must be active, otherw...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.1257
更新日期:2015-09-22 00:00:00
abstract::Osteogenesis imperfecta (OI) is a genetic disorder that is usually caused by disturbed production of collagen type I. Depending on its severity in the patient, this disorder may create difficulties and challenges for the dental practitioner. The goal of this article is to provide guidelines based on scientific evidenc...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.5464
更新日期:2018-08-17 00:00:00
abstract::We present a semi-empirical (PM6-based) computational method for systematically estimating the effect of all possible single mutants, within a certain radius of the active site, on the barrier height of an enzymatic reaction. The intent of this method is not a quantitative prediction of the barrier heights, but rather...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.111
更新日期:2013-07-23 00:00:00
abstract::Objectives. We wished to determine test re-test reliability and construct validity of the star-track test of manual dexterity. Design. Test re-test reliability was examined in a controlled study. Construct validity was tested in a blinded randomized crossover study. Setting. The study was performed at a university hos...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.917
更新日期:2015-04-23 00:00:00
abstract::The shifting baseline syndrome describes a gradual lowering of human cognitive baselines, as each generation accepts a lower standard of resource abundance or size as the new norm. There is strong empirical evidence of declining trends of abundance and body sizes of marine fish species reported from docks and markets....
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.6395
更新日期:2019-02-15 00:00:00
abstract::Palythoa caribaeorum is a zoanthid often dominant in shallow rocky environments along the west coast of the Atlantic Ocean, from the tropics to the subtropics. This species has high environmental tolerance and is a good space competitor in reef environments. Considering current and future scenarios in the global clima...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.4777
更新日期:2018-05-17 00:00:00
abstract::Knowledge on the precise identification of fish resources is critical for sustainable fisheries management. This study employs the DNA barcoding approach to generate a molecular taxonomic catalogue of commercially important reef fishes in the waters of Weh Island (Aceh Province), the most northerly inhabited island in...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.9641
更新日期:2020-08-05 00:00:00
abstract:Background:"Quantile-dependent expressivity" occurs when the effect size of a genetic variant depends upon whether the phenotype (e.g. adiponectin) is high or low relative to its distribution. We have previously shown that the heritability (h2 ) of adiposity, lipoproteins, postprandial lipemia, pulmonary function, and ...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.10099
更新日期:2020-10-14 00:00:00
abstract::The present study evaluated the level of support and satisfaction among parents of stillborn babies in Australian hospitals. One-hundred and eighty-nine mothers and fathers completed an online survey designed by the researcher based on the guidelines designed by the Perinatal Society of Australia and New Zealand. Supp...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.1049
更新日期:2015-06-25 00:00:00
abstract:Background:The circadian clock not only participates in regulating various stages of plant growth, development and metabolism, but confers plant environmental adaptability to stress such as drought. Pseudo-Response Regulators (PRRs) are important component of the central oscillator (the core of circadian clock) and pla...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.9936
更新日期:2020-09-25 00:00:00
abstract::Based on concordant differences in male advertisement call, tadpole morphology, and absence of haplotype sharing in the barcoding 16S mitochondrial DNA, we describe here a new species of spotted leaf frog of the genus Phasmahyla from Atlantic Forest, State of Rio de Janeiro, Southeast Brazil. The new species is most s...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.4900
更新日期:2018-05-30 00:00:00
abstract:Aims:The study aimed to explore factors contributing to body weight change over time in gastric cancer patients after gastrectomy, in order to find risk factors to implement nutritional intervention beforehand. Methods:A cohort of gastric cancer patients who were treated with gastrectomy from January to March 2019 at ...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.9390
更新日期:2020-07-10 00:00:00
abstract::The reliability of finite element analysis (FEA) in biomechanical investigations depends upon understanding the influence of model assumptions. In producing finite element models, surface mesh resolution is influenced by the resolution of input geometry, and influences the resolution of the ensuing solid mesh used for...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.988
更新日期:2015-06-02 00:00:00
abstract::Agriculture is one of the main drivers of land conversion, and agriculture practices can impact on microbial diversity. Here we characterized the phyllosphere fungal diversity associated with Carménère grapevines under conventional and organic agricultural management. We also explored the fungal diversity present in t...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.5715
更新日期:2018-10-29 00:00:00
abstract:BACKGROUND:Parasites are essential components of natural communities, but the factors that generate skewed distributions of parasite occurrences and abundances across host populations are not well understood. METHODS:Here, we analyse at a seascape scale the spatiotemporal relationships of parasite exposure and host bo...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.3675
更新日期:2017-08-17 00:00:00
abstract:Background:Endometriosis (EMs) is a non-malignant gynecological disease, whose pathogenesis remains to be clarified. Recent studies have found that hypoxia induces epithelial-mesenchymal transition (EMT) as well as epigenetic modification in EMs. However, the relationship between EMT and demethylation modification unde...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.9950
更新日期:2020-09-15 00:00:00
abstract::Although mosquito microbiota are known to influence reproduction, nutrition, disease transmission, and pesticide resistance, the relationship between host-associated microbial community composition and geographical location is poorly understood. To begin addressing this knowledge gap, we characterized microbiota assoc...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.6168
更新日期:2019-01-09 00:00:00
abstract::Engaging in effortful self-control can sometimes impair people's ability to resist subsequent temptations. Existing research has shown that when chronic dieters' self-regulatory capacity is challenged by prior exertion of effort, they demonstrate disinhibited eating and altered patterns of brain activity when exposed ...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.6550
更新日期:2019-02-28 00:00:00
abstract::The mitochondrial genome (mitogenome) sequence of the tree frog Polypedates megacephalus (16,473 bp) was previously reported as having the unusual characteristic of lacking the ND5 gene. In this study, a new mitogenome of P. megacephalus (19,952 bp) was resequenced using the next-generation sequencing (NGS) and standa...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.7415
更新日期:2019-08-01 00:00:00
abstract::Seasonality impacts species distributions through changes of the environmental conditions that affect the presence of individuals at a given place. Although the dynamics of cave microclimates are well known, only a few studies have evaluated the effects of such dynamics on non-strictly cave species. Here we assessed i...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.3169
更新日期:2017-05-10 00:00:00
abstract::Pseudogymnoascus destructans (Pd), the causative agent of white-nose syndrome in bats (WNS), has led to dramatic declines of bat populations in eastern North America. In the spring of 2016, WNS was first detected at several locations in Washington State, USA, which has prompted the need for large scale surveillance ef...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.8141
更新日期:2020-01-20 00:00:00
abstract:Background:Current and future changes in rainfall amount and frequency may particularly impact annual plants in desert ecosystems. The winter annual Echinops gmelinii Turcz. is widely distributed in the desert habitats of northern China and is a dominant pioneer annual plant following sand stabilization in the Tengger ...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.8159
更新日期:2019-11-29 00:00:00
abstract::Background. Eucryptodiran turtles from the Late Jurassic (mainly Kimmeridgian) deposits of the Jura Mountains (Switzerland and France) are among the earliest named species traditionally referred to the Plesiochelyidae, Thalassemydidae, and Eurysternidae. As such, they are a reference for the study of Late Jurassic euc...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.369
更新日期:2014-05-13 00:00:00
abstract:Background:The enriched environment (EE) is a laboratory housing model that emerged from efforts to minimize the impact of environmental conditions on laboratory animals. Recently, we showed that EE promoted positive effects on behavior and cortisol levels in zebrafish submitted to the unpredictable chronic stress (UCS...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.5136
更新日期:2018-07-05 00:00:00
abstract:Introduction:Whole-metagenome sequencing can be a rich source of information about the structure and function of entire metagenomic communities, but getting accurate and reliable results from these datasets can be challenging. Analysis of these datasets is founded on the mapping of sequencing reads onto known genomic r...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.6174
更新日期:2019-01-30 00:00:00
abstract::Among helminth parasites, Paragonimus (zoonotic lung fluke) gains considerable importance from veterinary and medical points of view because of its diversified effect on its host. Nearly fifty species of Paragonimus have been described across the globe. It is estimated that more than 20 million people are infected wor...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.484
更新日期:2014-08-12 00:00:00
abstract::Purple Broccoli (Brassica oleracea L. var italica) attracts growing attention as a functional food. Its purple coloration is due to high anthocyanin amounts. Light represents a critical parameter affecting anthocyanins biosynthesis. In this study, 'Purple Broccoli', a light-responding pigmentation cultivar, was assess...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.8870
更新日期:2020-05-05 00:00:00
abstract::Several data loggers deployed to monitor temperature and humidity of Crocodylus acutus (American crocodile) nests in South Florida could not be located after hatching. One badly damaged data logger was retrieved, providing insight into the possible fate of the others. Using a taphonomic approach, we identified numerou...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.8577
更新日期:2020-02-17 00:00:00
abstract::Chronostratigraphic correlation of terrestrial Early Cretaceous biotas in China is highly problematic due to the lack of marine deposits, few absolute dates, and limited number of index fossils. This often leaves vertebrate faunas as one of the few potential tools for a preliminary biostratigraphy. Taxonomic identity ...
journal_title:PeerJ
pub_type: 杂志文章
doi:10.7717/peerj.6229
更新日期:2019-01-15 00:00:00