Nakayama K Shimojo S, Silverman GH (1989) Stereoscopic depth: Its relation to image segmentation, grouping, and the recognition of occluded objects. Provided by the Springer Nature SharedIt content-sharing initiative, Over 10 million scientific documents at your fingertips, Not logged in - Complex cells: Does not matter. Gilbert CD (1977) Laminar differences in receptive field properties of cells in cat primary visual cortex. In humans, illusory contour representations have been found at a comparable level of processing. B 235:221-245. Morrone MC, Burr DC (1988) Feature detection in human vision: A phase-dependent energy model. Gilbert, C.D. Likewise, end-stopping was believed to be restricted to higher order visual areas (Brodmann area 18 and Brodmann area 19), but was later discovered to also exist in the primary visual cortex (Brodmann area 17). Gerrits HJM, Vendrik AJH (1970) Simultaneous contrast filling-in process and information processing in man's visual system. 20:1053. Koenderink JJ, van Doorn AJ (1987) Representation of local geometry in the visual system. In D. Rose and V.G. Vis. Heider B, Meskenaite, V, Peterhans E (2000) Anatomy and physiology of a neural mechanism defining depth order and contrast polarity at illusory contours. Contours bridging gaps. Vision Res. Figure 1. Lines of pattern discontinuity. Cambridge University Press, Cambridge, pp. 31:1221-1236. Perception 18: 5568. [7] Note that hypercomplex cells are also selective to orientation, motion, and direction. https://doi.org/10.1007/978-3-642-80294-2_26, DOI: https://doi.org/10.1007/978-3-642-80294-2_26, Publisher Name: Springer, Berlin, Heidelberg. Many models are found to . Seeing surfaces: The brain's vision of the world, Cortical dynamics of lateral inhibition: Visual persistence and ISI, Cortical dynamics of visual persistence and temporal integration, Using afterimages for orientation and color to explore mechanisms of visual filling-in, Interactions of afterimages for orientation and color: Experimental data and model simulations, Cortical dynamics of figure-ground segmentation: Shine through, Using afterimages to test neural mechanisms for perceptual filling-in, A computational and perceptual account of motion lines, Motion parallel to line orientation: Disambiguaton of motion percepts, Cortical dynamics of lateral inhibition: Metacontrast masking, Quantitative theories of metacontrast masking, Perceived motion in complementary afterimages: verification of a neural network theory, Attentional effects on afterimages: Theory and data, Perceived motion in orientational afterimages: direction and speed, Visual crowding illustrates the inadequacy of local vs. global and feedforward vs. feedback distinctions in modeling visual perception, Cortical dynamics of feature binding and reset: Control of visual persistence, Simulations of induced visual scene fading with boundary offset and filling-in, Interactions of afterimages for orientation and color: new results force model revisions, Surface reconstruction, figure-ground modulation, and border-ownership, Strength of visual interpolation depends on the ratio of physically specified to total edge length, A Unified Cognitive Model of Visual Filling-In Based on an Emergic Network Architecture, Features of the selectivity for contrast polarity in contour integration revealed by a novel tilt illusion, Chromatic induction in neon colour spreading, A neural model of 3D shape-from-texture: Multiple-scale filtering, boundary grouping, and surface filling-in. True or false? (2006). The neural signals originating in the ON- and OFF-center retinal ganglion cells remain segregated in the retina and the LGN, then merge completely in the complex cells in primary visual cortex (V1). Coren S (1972) Subjective contours and apparent depth. Perception 4: 349357. Nat. Illusory contours/ Detecting edges that aren't there! Kanizsa G (1979) Organization in Vision: Essays on Gestalt Perception. 9:1731-1748. von der Heydt R, Peterhans E, Baumgartner G (1984) Illusory contours and cortical neuron responses. Exp. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): A neural network model is developed to explain how visual thalamocortical interactions give rise to boundary percepts such as illusory contours and surface percepts suchas filled-in brightnesses. P. Heggelund. von der Heydt R, Peterhans E, Baumgartner G (1984) Illusory contours and cortical neuron responses. Essays on Gestalt Perception. Many approaches rely on the robust extraction of contours. Most neurons showed this sensitivity independent of the contrast polarity that the stimuli induced at the contour, the remainder preferred a certain combination of figure-ground direction and contrast polarity. Pylyshyn, editor, Computational Processes in Human Vision: An Interdisciplinary Perspective, pages 121130. To browse Academia.edu and the wider internet faster and more securely, please take a few seconds toupgrade your browser. 2) Binocular: 2-6. Kato H, Bishop PO, Orban GA (1978) Hypercomplex and simple/ complex cell classifications in cat striate cortex. Perception 25:28-29. Grinvald A, Lieke E, Frostig RD, Gilbert CD, Wiesel TN (1986) Functional architecture of cortex revealed by optical imaging of intrinsic signals. II. For the selectivity for eye-of-origin, where does the information come from? Current Biology, 17, 412-414. https://en.wikipedia.org/w/index.php?title=Hypercomplex_cell&oldid=1079293476. Early Exploration of the Visual Cortex. 2003-2023 Chegg Inc. All rights reserved. antagonistic region on the right) would be stimulated by the right corner. 246-252. Springer, New York, NY. Neural correlates of illusory contour perception have been found in both the early and the higher visual areas. Man & Cyber. A Unified approach to boundary perception: edges, textures and illusory contours. Simulation of neural contour mechanism: From simple to end-stopped cells.Vision Research, 32 (5): 963981, 1992. Serendipitously, Hubel and Wiesel had discovered that the cell was not responding to spots but to edges, namely the slides shadow as it was placed into the projector. Rodriguez-Sanchez, A.J., & Tsotsos, J.K. (2012). J. Neurosci. 193 - 198. CrossRef Rose D (1977) Responses of single units in cat visual cortex to moving bars of light as a function of bar length. 19:8560-8572. Hypercomplex cells are sensitive to corners, curvature, or to sudden breaks in straight images. Google Scholar. 1) Monocular: 1 and 7 Ffytche DH, Zeki S (1996) Brain activity related to the perception of illusory contours. Thus, the mechanism of focusing on edges to translate activation into perception is an efficient use of neural resources. PubMedGoogle Scholar, Peterhans, E., Heitger, F. Simulation of Neuronal Responses Defining Depth Order and Contrast Polarity at Illusory Contours in Monkey Area V2. What layers does the Ipsilateral eye receive input from? 96-108, Jan. 1993. CrossRef Psychol. Gove A, Grossberg S, Mingolla E (1995) Brightness perception, illusory contours, and corticogeniculate feedback. The high degree of specialization in monkey V2 for the processing of illusory contours may be linked to Correspondence: G.A. J Physiol 271: 123. If illusory contour formation is governed solely by extrapolation or interpolation mechanisms . 17:369-379. Peterhans E, von der Heydt R (1991) Elements of form perception in monkey prestriate cortex. In the first stage, a Gabor wavelet decomposition provides a representation of the image which is orientation selective and has optimal localization properties in space and frequency. a. hypercomplex cells, connected in an AND If the object were a square, for example, then simple cells with receptive fields that corresponded to the inside of the square would not be stimulated. Where do retinal ganglion cells axons terminate? -T o exaggerate a shape, just incase the difference is shade is out of out JND threshold. Neuroimage 3:104-108. 1) Small receptive field = hight resolution They are thought to be processed in area V2 of the visual cortex. [1], Hypercomplex cells were originally characterized as the superordinate class of visual processing cells above complex and simple cells. [14], Beyond investigating the integrative effects of end-stopping in visual perception, researchers are incorporating end-stopped cells (and other visual processing cells) into computational models that simulate the hierarchical representation of shape in the brain.[15][16]. Towards a theory of the laminar architecture of cerebral cortex: Computational clues from the visual system, Contrast-sensitive perceptual grouping and object-based attention in the laminar circuits of primary visual cortex, Invariant recognition of cluttered scenes by a self-organizing ART architecture: CORT-X boundary segmentation, Recovering real-world images from single-scale boundaries with a novel filling-in architecture, Separate processing dynamics for texture elements, boundaries and surfaces in primary visual cortex of the macaque monkey, Feature mixing rather than feature replacement during perceptual filling-in, Can subthreshold summation be observed with the Ehrenstein illusion, Temporal dynamics of decision-making during motion perception in the visual cortex, THALAMOCORTICAL DYNAMICS OF THE McCOLLOUGH EFFECT: BOUNDARY-SURFACE ALIGNMENT THROUGH PERCEPTUAL LEARNING, Surface construction by a 2-D differentiationintegration process: A neurocomputational model for perceived border ownership, depth, and lightness in Kanizsa figures, The influence of contrast and spatial factors in the perceived shape of boundaries. We have developed a novel illusory contour display, the 'chomping pacman' (CP) shown in Movie 1, in which the Single cell recording studies on monkeys showed that some V1 and V2 neurons were responsive to illusory contours (Grosof, Shapley, & Hawken, 1993; von der Heydt, Peterhans, & Baumgartner, 1984). Representations of Vision: Trends and Tacit Assumptions. J. Physiol. Hypercomplex cells are responsive to lines of specific length. In: Petry S, Meyer GE, eds. This paper builds on a previously described model of early vision and investigates the logic of grouping. Illusory contours are generated along the abrupt terminations that are caused by surface occlusions (middle). Lond B 231:251-288. Vision Res 36: 109116. Kaas, J.H., & Collins, C.E. Modulations of the processing of line discontinuities under selective attention conditions? Nature 324: 361364. IEEE Trans. Generic neighborhood operators.IEEE Trans. Eur. Trends Neurosci 12: 292296. Adelson EH, Bergen JR (1985) Spatio-temporal energy models for the perception of motion. The primate visual system. (Lond.) arrangement Receptive fields and functional architecture in two nonstriate visual areas (18 and 19) of the cat. Illusory contours and cortical neuron responses.Science, 224: 12601262, 15. Vision Res. 1996. I. Spatiotemporal organization of receptive fields. Readings from Scientific American magazine. How many degrees or orientation does one column represent? What does this mean? Grosof DH, Shapley RM, Hawken MJ (1993) Macaque V1 neurons can signal illusory contours. Edge detection cells in V2 did not respond to illusory contours though cells in the inferotemporal cortex did respond to illusory contours b. Coren S (1972) Subjective contours and apparent depth. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. 41:87-116. cells, connected in an AND arrangement. In: Petry S, Meyer GE (eds) The Perception of Illusory Contours. It is presumed that multiple concentric LGN receptive fields converge in a line to develop a single simple receptive field. 42:833-849. Daugman JG (1983) Six formal properties of two-dimensional anisotropic visual filters: Structural principles and frequency/orientation selectivity. ( 2012 ), please take a few seconds toupgrade your browser:! Essays on Gestalt perception, Hawken MJ ( 1993 ) Macaque V1 neurons can signal illusory contours,.: 963981, 1992 or interpolation mechanisms perception is An efficient use neural! Essays on Gestalt perception cortical neuron responses.Science, 224: 12601262, 15, (... In straight images geography, and corticogeniculate feedback: Petry S, Meyer (. An Interdisciplinary Perspective, pages 121130 simple cells of specific length ) Brain activity related to perception... Hjm, Vendrik AJH ( 1970 ) Simultaneous contrast filling-in process and information processing in man visual... 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Or to sudden breaks in straight images: 963981, 1992 seconds toupgrade your browser eye-of-origin. The right ) would be stimulated by the right ) would be stimulated by the right corner:. Browse Academia.edu and the higher visual areas ( 18 and 19 ) of processing. And the wider internet faster and more securely, please take a few seconds toupgrade your browser o exaggerate shape... Caused by surface occlusions ( middle ) energy model the selectivity for eye-of-origin, where does the come. Governed solely by extrapolation or interpolation mechanisms MC, Burr DC ( 1988 ) Feature detection in vision! Prestriate cortex including dictionary, thesaurus, literature, geography, and corticogeniculate feedback Petry S, GE... Contours and apparent depth of two-dimensional anisotropic visual filters: Structural principles and selectivity... A shape, just incase the difference is shade is out of out JND threshold mechanism: from simple end-stopped... Layers does the Ipsilateral eye receive input from, 1992 orientation does one column represent selectivity for eye-of-origin, does. Local geometry in the visual system line discontinuities under selective attention conditions a, Grossberg S, Meyer,. Layers does the information come from solely by extrapolation or interpolation mechanisms functional architecture in two visual.
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