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An afterimage in general is an optical illusion that refers to an image continuing to appear after exposure to the original image has ceased. Prolonged viewing of the colored patch induces an afterimage of the complementary color (for example, yellow color induces a bluish afterimage).
A stimulus consistently produces the same afterimage, which is dependent on the stimulus intensity and contrast, the time of fixation, and the retinal adaptation state. Physiological afterimages are usually the complementary color of the original stimulus ( negative afterimage ), while palinoptic afterimages are usually the same color as the ...
Under a phenomenon known as the ‘negative picture illusion’, a negative image can be briefly experienced by the human visual system where an afterimage persists subsequent to a prolonged gaze. Film negatives usually have less contrast, but a wider dynamic range, than the final printed positive images.
This theory also explains negative afterimages; once a stimulus of a certain color is presented, the opponent color is perceived after the stimulus is removed because the anabolic and catabolic processes are reversed. For example, red creates a positive (or excitatory) response while green creates a negative (or inhibitory) response.
The observer then perceives a cyan (or magenta) square on the blank sheet. This complementary color afterimage is more easily explained by the trichromatic color theory (Young–Helmholtz theory) than the traditional RYB color theory; in the opponent-process theory, fatigue of pathways promoting red produces the illusion of a cyan square. [39]
This is known as negative frequency dependence—an evolutionary principle where having a rare trait is considered more appealing and advantageous for survival. #20 I Think My Beard Looks Good ...
What does it mean to refinance a mortgage? Refinancing is a process of trading in your current mortgage to another lender for lower rates and better terms than your current loan. With a refinance ...
Image credits: gnomeplanet "Embarrassment is a light form of shame, a universal emotion designed to inhibit anti-social behavior," psychoanalyst and AEDP psychotherapist Hilary Jacobs Hendel told ...