20 papers · ranked by Valyu relevance
Christopher W. Tyler
This overview discusses the nature of perceptual illusions with particular reference to the theory that illusions represent the operation of a sensory code for which there is no meaningful ground truth against which the illusory percepts can be compared, and therefore there are no illusions as such. This view…
Chrysa Retsa, Ana Hernando Ariza, Nathanael W. Noordanus, Lorenzo Ruffoni + 2 more
Geometrical optical illusion (GOIs) are mismatches between physical stimuli and perception. GOIs provide an access point to study the interplay between sensation and perception, yet there is scant quantitative investigation of the extent to which different GOIs rely on similar or distinct brain mechanisms. We addressed…
Haz Sameen Shahgir, Khondker Salman Sayeed, Abhik Bhattacharjee, Wasi Uddin Ahmad + 2 more
Models Authors: ['Haz Sameen Shahgir' 'Khondker Salman Sayeed' 'Abhik Bhattacharjee' 'Wasi Uddin Ahmad' 'Yue Dong' 'Rifat Shahriyar'] The advent of Vision Language Models (VLM) has allowed researchers to investigate the visual understanding of a neural network using natural language. Beyond object classification and…
Semir Zeki, Zachary F Hale, Ahmad Beyh, Samuel E Rasche
There are different definitions of axioms, but the one that seems to have general approval is that axioms are statements whose truths are universally accepted but cannot be proven; they are the foundation from which further propositional truths are derived. Previous attempts, led by David Hilbert, to show that all of…
Nicholas J. Wade, Dejan Todorović, David Phillips, Bernd Lingelbach
The term geometrical-optical illusions was coined by Johann Joseph Oppel (1815-1894) in 1855 in order to distinguish spatial distortions of size and orientation from the broader illusions of the senses. We present a translation of Oppel’s article and a commentary on the material described in it. Oppel did much more…
Richard Wiseman, Will Houstoun
Past research has used the phi phenomenon to create the illusion of one object moving through another. This article presents three optical illusions that are conceptually similar, yet little known within academic psychology. Two of the illusions have been developed within the magic community and involve the performer…
Chris W. Bao, Emma Martin, Basilis Zikopoulos, Arash Yazdanbakhsh
The population receptive field (pRF) in vision reflects the functional receptive field arising from millions of overlapping single receptive fields across visual areas and eccentricities. pRFs are typically estimated with fMRI to gain insight into visual processing. Alternative methods of pRF estimation, such as using…
Caterina Berardo, Ruben Holland, Alina Schaffer, Alvaro Lopez Caicoya + 3 more
'Alvaro Lopez Caicoya' 'Katja Liebal' 'Paola Valsecchi' 'Federica Amici'] Optical illusions have long been used in behavioural studies to investigate the perceptual mechanisms underlying vision in animals. So far, three studies have focused on ungulates, providing evidence that they may be susceptible to some optical…
H. A. Sedgwick
Perception” Authors: ['H. A. Sedgwick'] J. J. Gibson's ground theory of space perception is contrasted with Descartes’ theory, which reduces all of space perception to the perception of distance and angular direction, relative to an abstract viewpoint. Instead, Gibson posits an embodied perceiver, grounded by gravity…
Shinozaki, Taiga, Tomoki Doi, Amane Watahiki + 2 more
Humans are susceptible to optical illusions, which serve as valuable tools for investigating sensory and cognitive processes. Inspired by human vision studies, research has begun exploring whether machines, such as large vision language models (LVLMs), exhibit similar susceptibilities to visual illusions. However…
Alain Goriely
One of the oldest and most enduring myths in human history is the belief that the Parthenon was cleverly designed with various curved structures and sizes in order to correct optical illusions, and therefore appear straight and regular. The myth has its origin in the writings of Vitruvius more than 2,000 years ago and…
Elias L. Khalil
Many researchers use the term “context” loosely to denote diverse kinds of reference points. The issue is not about terminology but rather about the common conflation of one kind of reference points, such as rules of perception, which is responsible for optical illusions, with another kind, known as “context” or…
Yutaka Nishiyama
Hermann discovered the grid illusion in 1870, but its cause has remained a mystery for more than 150 years. In 1960, Baumgartner proposed a hypothesis for the illusion based on neural receptive fields, but Geier presented a counterexample in 2008. In 1994, Spillmann devised the scintillating grid illusion, an…
Ruggero Micheletto, Maria Fernanda Avila-Ortega
We studied the influence of mechanical vibrotactile signals in the acoustic range to the visual perception of flickering images. These images are shown on a CRT screen intermittent at about 75 Hz, without external perturbations are perceived as constant and stable. However, if presented together with a controlled…
Benedetta Franceschiello, Alessandro Sarti, Giovanna Citti
Geometrical optical illusions have been object of many studies due to the possibility they offer to understand the behaviour of low-level visual processing. They consist in situations in which the perceived geometrical properties of an object differ from those of the object in the visual stimulus. Starting from the…
Sergey I. Bozhevolnyi
The Poggendorff illusion in its classical form of parallel lines interrupting a transversal is viewed from the perspective of being related to the everyday experience of observing the light refraction in water. It is argued that, if one considers a transversal to be a light ray in air and the parallel lines to form an…
Weixiang Jiang, Cheng‐Wei Qiu, Tiancheng Han, Shuang Zhang + 1 more
'Tie Jun Cui'] Abstract: The creation of wave-dynamic illusion functionality is of great interests to various scientific communities, which can potentially transform an actual perception into the precontrolled perception, thus empowering unprecedented applications in the advanced-material science, camouflage, cloaking…
Victor Rodriguez-Lopez, Carlos Dorronsoro, Johannes Burge
Interocular differences in image blur can cause dramatic misperceptions of the distance and three-dimensional direction of moving objects. This new illusion—the reverse Pulfrich effect—is caused by the optical conditions induced by monovision, a common correction for presbyopia. Fortunately, anti-Pulfrich monovision…
Victor Rodriguez-Lopez, Benjamin Chin, Johannes Burge
The Pulfrich Effect is an illusion characterized by the misperception of the depth and 3D direction of moving objects. Interocular luminance differences cause the Classic Pulfrich effect; the darker image is processed more slowly. Interocular blur differences cause the Reverse Pulfrich effect; the blurrier image is…
Cherlyn J Ng, Randolph Blake, Martin S Banks, Duje Tadin + 1 more
Stereovision is the ability to perceive fine depth variations from small differences in the two eyes’ images. Using adaptive optics, we show that even minute optical aberrations that are not clinically correctable, and go unnoticed in everyday vision, can affect stereo acuity. Hence, the human binocular system is…