Complete mergeability and amodal completion.

When image fragments are taken to correspond to the visible portions of a single occluded object, the object is said to 'amodally complete' behind the occluder. Kellman and Shipley (Kellman, P. J., & Shipley, T. F. (1991). A theory of visual interpolation in objective perception. Cognitive Psychology, 23, 144-221) argued that when the virtual contour extensions of such image fragments subtend an obtuse or right angle, the contours are 'relatable' and therefore complete. However, edge and surface relatability are neither necessary nor sufficient for completion to be perceived (Tse, P. U. (1999) Volume completion. Cognitive Psychology). Evidence is offered that completion is not driven directly by image cues such as contour relatability, but is driven, rather, by intermediate representations, such as volumes that are inferred from global image cue relationships. Evidence suggests that several factors, none of which is necessary for amodal completion to occur, contribute to the perceived strength of amodal completion, including similarity of pattern or substance, proximity, and good volume continuation or complete mergeability. Two partially occluded volumes are completely mergeable when they can be extended into occluded space along the trajectory defined by their visible surfaces such that they merge entirely with each other. Mergeability is not measurable in the image because it describes an inferred relationship among volumes that must themselves be inferred from the image.

[1]  David G. Lowe,et al.  Three-Dimensional Object Recognition from Single Two-Dimensional Images , 1987, Artif. Intell..

[2]  K Nakayama,et al.  Stereoscopic Depth: Its Relation to Image Segmentation, Grouping, and the Recognition of Occluded Objects , 1989, Perception.

[3]  Peter Ulric Tse,et al.  Volume Completion , 1999, Cognitive Psychology.

[4]  F ATTNEAVE,et al.  The quantitative study of shape and pattern perception. , 1956, Psychological bulletin.

[5]  G. Butterworth,et al.  Michotte's experimental phenomenology of perception , 1994 .

[6]  J HOCHBERG,et al.  The psychophysics of form: reversible-perspective drawings of spatial objects. , 1960, The American journal of psychology.

[7]  R. van Lier.  Investigating global effects in visual occlusion: from a partly occluded square to the back of a tree-trunk. , 1999, Acta psychologica.

[8]  S Shimojo,et al.  The Theory of the Curvature-Constraint Line for Amodal Completion , 1995, Perception.

[9]  G. Kanizsa,et al.  Organization in Vision: Essays on Gestalt Perception , 1979 .

[10]  F. Boselie,et al.  A good-continuation model of some occlusion phenomena , 1992, Psychological research.

[11]  K Nakayama,et al.  Experiencing and perceiving visual surfaces. , 1992, Science.

[12]  Harry G. Barrow,et al.  Interpreting Line Drawings as Three-Dimensional Surfaces , 1980, Artif. Intell..

[13]  Max Wertheimer,et al.  Untersuchungen zur Lehre von der Gestalt , .

[14]  Jaakko Hintikka,et al.  On the Logic of Perception , 1969 .

[15]  J. Wagemans,et al.  From images to objects: Global and local completions of self-occluded parts , 1999 .

[16]  Shinsuke Shimojo,et al.  Visual surface representation: a critical link between lower-level and higher level vision , 1995 .

[17]  M K Albert,et al.  Parallelism and the Perception of Illusory Contours , 1993, Perception.

[18]  S. Sutherland.  Seeing things , 1989, Nature.

[19]  Rob van Lier,et al.  Investigating global effects in visual occlusion: from a partly occluded square to the back of a tree-trunk. , 1999 .

[20]  David G. Lowe,et al.  Perceptual Organization and Visual Recognition , 2012 .

[21]  Donald D. Hoffman,et al.  Parts of recognition , 1984, Cognition.

[22]  P J Kellman,et al.  Surface Completion Complements Boundary Interpolation in the Visual Integration of Partly Occluded Objects , 1997, Perception.

[23]  A. Sekuler.  Local and Global Minima in Visual Completion: Effects of Symmetry and Orientation , 1994, Perception.

[24]  P U Tse,et al.  Amodal Completion in the Absence of Image Tangent Discontinuities , 1998, Perception.

[25]  Amodal completion: Simplicity is not the explanation , 1986 .

[26]  J. Feldman.  The role of objects in perceptual grouping. , 1999, Acta psychologica.

[27]  A. Michotte,et al.  Les compléments amodaux des structures perceptives , 1964 .

[28]  Thomas O. Binford,et al.  Inferring Surfaces from Images , 1981, Artif. Intell..

[29]  M. Wertheimer.  Untersuchungen zur Lehre von der Gestalt. II , 1923 .

[30]  David L. Waltz,et al.  Understanding Line drawings of Scenes with Shadows , 1975 .

[31]  P U Tse,et al.  Illusory Volumes from Conformation , 1998, Perception.

[32]  F. Boselie,et al.  A critical discussion of Kellman and Shipley's (1991) theory of occlusion phenomena , 1992, Psychological research.

[33]  E. Leeuwenberg,et al.  Coding theory of visual pattern completion. , 1981, Journal of experimental psychology. Human perception and performance.

[34]  Donald D. Hoffman,et al.  Salience of visual parts , 1997, Cognition.

[35]  P. Kellman,et al.  A theory of visual interpolation in object perception , 1991, Cognitive Psychology.

[36]  R van Lier,et al.  Integrating Global and Local Aspects of Visual Occlusion , 1994, Perception.

[37]  Stephen E. Palmer,et al.  Local and Global Processes in Visual Completion , 1994 .

[38]  E. Leeuwenberg,et al.  Competing global and local completions in visual occlusion. , 1995, Journal of experimental psychology. Human perception and performance.