Titlebook: Levels of Perception; Laurence Harris,Michael Jenkin Book 2003 Springer Science+Business Media New York 2003 attention.calculus.computer.n

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Levels of Brightness Perceptionrs such as simultaneous brightness contrast. A second, mid-level mechanism aims to achieve lightness constancy with respect to spatially varying illumination such as shading, shadows, highlights and transparency. The cost in this case is an enhancement of errors in brightness judgement.