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  1.  8
    Surface Construction by a 2-D Differentiation–Integration Process: A Neurocomputational Model for Perceived Border Ownership, Depth, and Lightness in Kanizsa Figures.Naoki Kogo, Christoph Strecha, Luc Van Gool & Johan Wagemans - 2010 - Psychological Review 117 (2):406-439.
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    Invariants Versus Non-Accidental Properties as Information Used in Affine Pattern Matching.Johan Wagemans, A. De Troy, Luc Van Gool, Wood Jr & D. H. Foster - 1993 - Bulletin of the Psychonomic Society 31:385.
    A series of experiments was performed in which subjects indicated whether two four-dot patterns were the same, although possibly viewed from different directions, or different, paired at random . Analyses of responses times and error rates suggest that the subjects' performance in this affine matching task is based on non-accidental properties such as convexity, parallelism, collinearity, and proximity, rather than on real affine invariants such as the ratio of triangular areas.
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    Qualitative Cues in the Discrimination of Affine-Transformed Minimal Patterns.Helja T. Kukkonen, David H. Foster, Jonathan R. Wood, Johan Wagemans & Luc Van Gool - 1996 - In Enrique Villanueva (ed.), Perception. Ridgeview. pp. 195-206.
    An important factor in judging whether two retinal images arise from the same object viewed from different positions may be the presence of certain properties or cues that are 'qualitative invariants' with respect to the natural transformations, particularly affine transformations, associated with changes in viewpoint. To test whether observers use certain affine qualitative cues such as concavity, convexity, collinearity, and parallelism of the image elements, a 'same-different' discrimination experiment was carried out with planar patterns that were defined by four points (...)
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