I have always wondered why we see pictures the way that we do and why is the life behind a lens so fascinating? As defined by Casper J. Erkrelens, "A picture is a powerful medium for inducing the illusion that one perceives a three-dimensional space." It is first important to discuss how we see an image. Reflection of light is the short answer. The reflection of light enters the eye through the pupil, which is the focused by the cornea and the lens. This then hits the retina where the visual receptors, rods and cones, are. This then travels to the brain for processing. What is so interesting about a photograph is that how familiar we are with a setting determines our perception of an image. Shape and relative size are cues for distance from the photographer to the object.
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