Visual illusions, their causes, characteristics and applications (1922)
Luckiesh, Matthew, b. 1883 · New York, D. Van Nostrand company · leaf 73
58 VISUAL ILLUSIONS The reader may readily construct an extensive variety of illusions of contrast; in fact, contrast plays a part in most geometrical-optical illusions. The … Fig. 21. — Owing to perspective the right angles appear oblique and vice versa. contrasts may be between existing lines, areas, etc., or the im^ination may supply some of them. Illusions of Perspective. — As the complexity of figures/is increased the number of possible illusions Y Fig. 22. — Two…
Optical illusions
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