Systematic Structural Analysis of Optical Illusion Art and Application in Graphic Design with Autism Spectrum Disorder
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Fibonacci Number
Fibonacci number From Wikipedia, the free encyclopedia • Have questions? Find out how to ask questions and get answers. • • Learn more about citing Wikipedia • Jump to: navigation, search A tiling with squares whose sides are successive Fibonacci numbers in length A Fibonacci spiral, created by drawing arcs connecting the opposite corners of squares in the Fibonacci tiling shown above – see golden spiral In mathematics, the Fibonacci numbers form a sequence defined by the following recurrence relation: That is, after two starting values, each number is the sum of the two preceding numbers. The first Fibonacci numbers (sequence A000045 in OEIS), also denoted as Fn, for n = 0, 1, … , are: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, ... (Sometimes this sequence is considered to start at F1 = 1, but in this article it is regarded as beginning with F0=0.) The Fibonacci numbers are named after Leonardo of Pisa, known as Fibonacci, although they had been described earlier in India. [1] [2] • [edit] Origins The Fibonacci numbers first appeared, under the name mātrāmeru (mountain of cadence), in the work of the Sanskrit grammarian Pingala (Chandah-shāstra, the Art of Prosody, 450 or 200 BC). Prosody was important in ancient Indian ritual because of an emphasis on the purity of utterance. The Indian mathematician Virahanka (6th century AD) showed how the Fibonacci sequence arose in the analysis of metres with long and short syllables. Subsequently, the Jain philosopher Hemachandra (c.1150) composed a well-known text on these. -
Susceptibility to Size Visual Illusions in a Non-Primate Mammal (Equus Caballus)
animals Brief Report Susceptibility to Size Visual Illusions in a Non-Primate Mammal (Equus caballus) Anansi Cappellato 1, Maria Elena Miletto Petrazzini 2, Angelo Bisazza 1,3, Marco Dadda 1 and Christian Agrillo 1,3,* 1 Department of General Psychology, University of Padova, 35131 Padova, Italy; [email protected] (A.C.); [email protected] (A.B.); [email protected] (M.D.) 2 Department of Biomedical Sciences, University of Padova, Via Bassi 58, 35131 Padova, Italy; [email protected] 3 Padua Neuroscience Center, University of Padova, Via Orus 2, 35131 Padova, Italy * Correspondence: [email protected] Received: 30 July 2020; Accepted: 13 September 2020; Published: 17 September 2020 Simple Summary: Visual illusions are commonly used by researchers as non-invasive tools to investigate the perceptual mechanisms underlying vision among animals. The assumption is that, if a species perceives the illusion like humans do, they probably share the same perceptual mechanisms. Here, we investigated whether horses are susceptible to the Muller-Lyer illusion, a size illusion in which two same-sized lines appear to be different in length because of the spatial arrangements of arrowheads presented at the two ends of the lines. Horses showed a human-like perception of this illusion, meaning that they may display similar perceptual mechanisms underlying the size estimation of objects. Abstract: The perception of different size illusions is believed to be determined by size-scaling mechanisms that lead individuals to extrapolate inappropriate 3D information from 2D stimuli. The Muller-Lyer illusion represents one of the most investigated size illusions. Studies on non-human primates showed a human-like perception of this illusory pattern. -
In This Research Report We Will Explore the Gestalt Principles and Their Implications and How Human’S Perception Can Be Tricked
The Gestalt Principles and there role in the effectiveness of Optical Illusions. By Brendan Mc Kinney Abstract Illusion are created in human perception in relation to how the mind process information, in this regard on to speculate that the Gestalt Principles are a key process in the success of optical illusions. To understand this principle the research paper will examine several optical illusions in the hopes that they exhibit similar traits used in the Gestalt Principles. In this research report we will explore the Gestalt Principles and their implications and how human’s perception can be tricked. The Gestalt Principles are the guiding principles of perception developed from testing on perception and how human beings perceive their surroundings. Human perception can however be tricked by understanding the Gestalt principles and using them to fool the human perception. The goal of this paper is to ask how illusions can be created to fool human’s perception using the gestalt principles as a basis for human’s perception. To examine the supposed, effect the Gestalt Principles in illusions we will look at three, the first being Rubin’s Vase, followed by the Penrose Stairs and the Kanizsa Triangle to understand the Gestalt Principles in play. In this context we will be looking at Optical Illusion rather than illusions using sound to understand the Gestalt Principles influence on human’s perception of reality. Illusions are described as a perception of something that is inconsistent with the actual reality (dictionary.com, 2015). How the human mind examines the world around them can be different from the actuality before them, this is due to the Gestalt principles influencing people’s perception. -
The Psychological Intersection of Motion Picture, the Still Frame, and Three-Dimensional Form
MOMENTUM, MOMENT, EPIPHANY: THE PSYCHOLOGICAL INTERSECTION OF MOTION PICTURE, THE STILL FRAME, AND THREE-DIMENSIONAL FORM by MARK GERSTEIN B.A. The University of Chicago, 1986 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Fine Arts in the School of Visual Arts and Design in the College of Arts and Humanities at the University of Central Florida Orlando, Florida Spring Term 2018 ABSTRACT My journey from Hollywood Film production to a Fine Arts practice has been shaped by theory from Philosophy of Mind, Cognitive Psychology, Film, and Art, leading me to a new visual vocabulary at the intersection of motion picture, the still image, and three-dimensional form. I create large mixed media collages by projecting video onto photographs and sculptural forms, breaking the boundaries of the conventional film frame and exceeding the dynamic range of typical visual experience. My work explores emotional connections and fissures within family, and hidden meanings of haunting memories and familiar places. I am searching for an elusive type of perceptual experience characterized by an instantaneous shift in perspective—an “aha” moment of epiphany when suddenly I have the overpowering feeling that I am both seeing and aware that I am seeing. ii To Lori, Joshua and Maya, for your infinite patience and unconditional love. iii ACKNOWLEDGMENTS I want to take this opportunity to acknowledge all my Studio Art colleagues who have so graciously tolerated my presence in their sandbox over these last few years. In particular, I want to thank my Thesis Committee: Carla Poindexter, my chair, for her nuanced critique, encouragement and unwavering belief in the potential of my work, and ability to embrace the seemingly contradictory roles of mentor and colleague; Jo Anne Adams, for her attention to detail and narrative sensibility that comes from our shared background in the film industry; and Ryan Buyssens, for showing me the possibilities of technology and interactivity, and reminding me to never lose sight of the meaning in my art. -
Computer-Aided Generation of Escher-Like Sky and Water Tiling Patterns
Computer-Aided Generation of Escher-like Sky and Water Tiling Patterns Kokichi Sugihara∗ Meiji University, 4-21-1 Nakano, Nakano-ku, Tokyo 164-8525, Japan [email protected] Abstract Dutch graphic artist M. C. Escher created many interesting prints based on tiling patterns. A typical example of such a print is Sky and Water I, in which a bird at the top deforms gradually towards the bottom and melts away into the background, while a fish gradually appears from the background. This paper presents an interactive system for creating Escher-like Sky and Water tiling patterns. In this system, a user supplies two figures, and the system places deformed copies of them in such a way that, from top to bottom, one figure gradually disappears into the background, while the other figure gradually appears from the background. The system combines tiling, morphing, and figure-ground reversal. The user can also specify the density of and a global pattern for the tiling. Keywords: tiling, morphing, Escher, figure-ground reversal, optical illusion. AMS MSC Code: 68U05 1 Introduction M. C. Escher (1898{1972), a Dutch graphic artist, created many interesting works based on tiling. A typical class of tiling art is based on isohedral tiling, in which identical tiles are placed so that the plane is covered without gaps or overlaps and each tile is surrounded in the same manner. For this class of tiling, possible patterns can be enumerated using a group-theoretic approach, and the complete list of 17 symmetry groups and the complete list of 93 types of incidence structure for tile boundaries have been constructed [6, 10]. -
Vision Biological Vision and Image Processing
Vision Stefano Ferrari Universit`adegli Studi di Milano [email protected] Methods for Image processing academic year 2016–2017 Biological vision and image processing I The human visual perception results from a chain of processing tasks, often cooperating with other perceptual activities. I Image processing is a discipline (mainly) based on mathematical and statistical concepts, with constraints imposed by the image acquisition technology. I The study of the human vision is useful for more than one reason: I the output of some processes is targeted for the vision of a human user; I the operation of the organs devoted to the acquisition and perception of images can inspire the development of similar artificial devices; moreover, the performance of image processing algorithms have to be compared; I some known mulfunctioning of the biological apparatus do not affect the image processing devices. Stefano Ferrari| Methods for Image processing| a.a. 2016/17 1 . Eye I cornea I sclera I pupil I iris I lens I choroid I retina I fovea I blind spot Blind spot: close the left eye, sta- re to the cross, come closer to the screen till the spot disappears. Distribution of the receptors on the retina On the retina, two kinds of receptors can be found: I cones; I rods. I Cones: I about 7 millions; I perception of details and rapid changes; I sensitive to colors; I sensitive in high illuminance conditions (photopic vision). I Rods: I about 100 millions; I provide a large scale vision; I sensitive in low illuminance conditions (scotopic vision). Stefano Ferrari| Methods for Image processing| a.a. -
Optical Illusions and Effects on Clothing Design1
International Journal of Science Culture and Sport (IntJSCS) June 2015 : 3(2) ISSN : 2148-1148 Doi : 10.14486/IJSCS272 Optical Illusions and Effects on Clothing Design1 Saliha AĞAÇ*, Menekşe SAKARYA** * Associate Prof., Gazi University, Ankara, TURKEY, Email: [email protected] ** Niğde University, Niğde, TURKEY, Email: [email protected] Abstract “Visual perception” is in the first ranking between the types of perception. Gestalt Theory of the major psychological theories are used in how visual perception realizes and making sense of what is effective in this process. In perception stage brain takes into account not only stimulus from eyes but also expectations arising from previous experience and interpreted the stimulus which are not exist in the real world as if they were there. Misperception interpretations that brain revealed are called as “Perception Illusion” or “Optical Illusion” in psychology. Optical illusion formats come into existence due to factors such as brightness, contrast, motion, geometry and perspective, interpretation of three-dimensional images, cognitive status and color. Optical illusions have impacts of different disciplines within the study area on people. Among the most important types of known optical illusion are Oppel-Kundt, Curvature-Hering, Helzholtz Sqaure, Hermann Grid, Muller-Lyler, Ebbinghaus and Ponzo illusion etc. In fact, all the optical illusions are known to be used in numerous area with various techniques and different product groups like architecture, fine arts, textiles and fashion design from of old. In recent years, optical illusion types are frequently used especially within the field of fashion design in the clothing model, in style, silhouette and fabrics. The aim of this study is to examine the clothing design applications where optical illusion is used and works done in this subject. -
The Retina the Retina the Pigment Layer Contains Melanin That Prevents Light Reflection Throughout the Globe of the Eye
The Retina The retina The pigment layer contains melanin that prevents light reflection throughout the globe of the eye. It is also a store of Vitamin A. Rods and Cones Photoreceptors of the nervous system responsible for transforming light energy into the electrical energy of the nervous system. Bipolar cells Link between photoreceptors and ganglion cells. Horizontal cells Provide inhibition between bipolar cells. This is the mechanism of lateral inhibition which is important to edge detection and contrast enhancement. Amacrine cells Transmit excitatory signals from bipolar to ganglion cells. Thought to be important in signalling changes in light intensity. Neural circuitry About 125 rods and 5 cones converge on each optic nerve fibre. In the central portion of the fovea there are no rods. The ratio of cones to optic nerves in the fovea is one. This increases the visual acuity of the fovea. Rods and Cones Photosensitive substance in rods is called rhodopsin and in cones is called iodopsin. The Photochemistry of Vision Rhodopsin and Iodopsin Cis-retinal +Opsin Light sensitive Light Trans-retinal Opsin Light insensitive This is a reversible reaction Cis-retinal +Opsin Light sensitive Vitamin A In the presence of light, the rods and cones are hyperpolarized mv t Hyperpolarizing potential lasts for upto half a second, leading to the perception of fusion of flickering lights. Receptor potential – rod and cone potential Hyperpolarizing receptor potential caused by rhodopsin decomposition. Hyperpolarizing potential lasts for upto half a second, leading to the fusion of flickering lights. Light and dark adaptation in the visual system The eye is capable of vision in conditions of light that vary greatly in intensity The eye adapts dynamically to lighting conditions Light and Dark Adaptation We are able to see in light intensities that vary greatly. -
Understanding Optical Illusions
Understanding Optical Illusions Mohit Gupta What are optical illusions? Perception: I see Light (Sensing) Truth: But this is an ! Oracle Optical Illusion in Nature Image Courtesy: http://apollo.lsc.vsc.edu/classes/met130/notes/chapter19/graphics/infer_mirage_road.jpg A Brightness Illusion Different kinds of illusions • Brightness and Contrast Illusions • Twisted Cord Illusions • Color Illusions • Perspective Illusions • Relative Motion Illusions • Illusions of Expressions Lightness Constancy Our Vision System tries to compensate for differences in illumination Why study optical illusions? • Studying how brain is fooled teaches us how it works “Illusions of the senses tell us the truth about perception” [Purkinje] • It makes us happy : Al Seckel Simultaneous Contrast Illusions Low-level Vision Explanation Negative Positive Photo-receptors Photo-receptors Receptive Fields in the Retina - Inhibitory Excitatory Light - + - Light - Low-level Vision Explanation - - - + - - + - Positive - - Negative Gradient Gradient High-level Vision Explanation: Context Less Incident More Incident Illumination Illumination Higher Perceived Lower Perceived Reflectance Reflectance Brightness = Reflectance * Incident Illumination The Hermann grid illusion The Hermann grid: Low level Explanation - - + - - Lateral Inhibition The Hermann grid illusion Focus on one intersection Why does the illusion disappear? Receptive fields are smaller near the fovea (center) of the eye The Waved Grid: No illusion! Scintillating Grids: Straight and Curved Adelson’s checkerboard -
A Defence of Separatism
A Defence of Separatism by Boyd Millar A thesis submitted in conformity with the requirements for the degree of Doctor of Philosophy Graduate Department of Philosophy University of Toronto © Copyright by Boyd Millar (2010) A Defence of Separatism Boyd Millar Doctor of Philosophy Graduate Department of Philosophy University of Toronto 2010 Abstract Philosophers commonly distinguish between an experience’s intentional content—what the experience represents—and its phenomenal character—what the experience is like for the subject. Separatism —the view that the intentional content and phenomenal character of an experience are independent of one another in the sense that neither determines the other—was once widely held. In recent years, however, separatism has become increasingly marginalized; at present, most philosophers who work on the issue agree that there must be some kind of necessary connection between an experience’s intentional content and phenomenal character. In contrast with the current consensus, I believe that a particular form of separatism remains the most plausible view of the relationship between an experience’s intentional content and phenomenal character. Accordingly, in this thesis I explain and defend a view that I call “moderate separatism.” The view is “moderate” in that the separatist claim is restricted to a particular class of phenomenal properties: I do not maintain that all the phenomenal properties instantiated by an experience are independent of that experience’s intentional content but only that this is true of the sensory qualities instantiated by that experience. I argue for moderate separatism by appealing to examples of ordinary experiences where sensory qualities and intentional content come apart. -
Informing Computer Vision with Optical Illusions
Informing Computer Vision with Optical Illusions Nasim Nematzadeh David M. W. Powers Trent Lewis College of Science and Engineering College of Science and Engineering College of Science and Engineering Flinders University Flinders University Flinders University Adelaide, Australia Adelaide, Australia Adelaide, Australia [email protected] [email protected] [email protected] Abstract— Illusions are fascinating and immediately catch the increasingly detailed biological characterization of both people's attention and interest, but they are also valuable in retinal and cortical cells over the last half a century (1960s- terms of giving us insights into human cognition and perception. 2010s), there remains considerable uncertainty, and even some A good theory of human perception should be able to explain the controversy, as to the nature and extent of the encoding of illusion, and a correct theory will actually give quantifiable visual information by the retina, and conversely of the results. We investigate here the efficiency of a computational subsequent processing and decoding in the cortex [6, 8]. filtering model utilised for modelling the lateral inhibition of retinal ganglion cells and their responses to a range of Geometric We explore the response of a simple bioplausible model of Illusions using isotropic Differences of Gaussian filters. This low-level vision on Geometric/Tile Illusions, reproducing the study explores the way in which illusions have been explained misperception of their geometry, that we reported for the Café and shows how a simple standard model of vision based on Wall and some Tile Illusions [2, 5] and here will report on a classical receptive fields can predict the existence of these range of Geometric illusions. -
A Neural Model of the Scintillating Grid Illusion: Disinhibi- Tion and Self-Inhibition in Early Vision
LETTER Communicated by Sidney Lehky A Neural Model of the Scintillating Grid Illusion: Disinhibi- tion and Self-Inhibition in Early Vision Yingwei Yu Downloaded from http://direct.mit.edu/neco/article-pdf/18/3/521/816498/neco.2006.18.3.521.pdf by guest on 24 September 2021 [email protected] Yoonsuck Choe [email protected] Department of Computer Science, Texas A&M University, College Station, Texas 77843-3112, U.S.A A stationary display of white discs positioned on intersecting gray bars on a dark background gives rise to a striking scintillating effect—the scin- tillating grid illusion. The spatial and temporal properties of the illusion are well known, but a neuronal-level explanation of the mechanism has not been fully investigated. Motivated by the neurophysiology of the Limulus retina, we propose disinhibition and self-inhibition as possible neural mechanisms that may give rise to the illusion. In this letter, a spa- tiotemporal model of the early visual pathway is derived that explicitly accounts for these two mechanisms. The model successfully predicted the change of strength in the illusion under various stimulus conditions, indicating that low-level mechanisms may well explain the scintillating effect in the illusion. 1 Introduction The scintillating grid illusion consists of bright discs superimposed on in- tersections of orthogonal gray bars on a dark background (see Figure 1A; Schrauf, Lingelbach, & Wist, 1997). In this illusion, illusory dark spots are perceived as scintillating within the white discs. Several important prop- erties of the illusion have been discovered and reported inrecent years. (1) The discs that are closer to a fixation show less scintillation (Schrauf et al., 1997), which might be due to the fact that receptive fields in the periphery are larger than those in the fovea.