착시 현상

An optical illusion is characterized by visually perceived images that, at least in common sense terms, are deceptive or misleading. Therefore, the information gathered by the eye is processed by the brain to give, on the face of it, a percept that does not tally with a physical measurement of the stimulus source. A conventional assumption is that there are physiological illusions that occur naturally and cognitive illusions that can be demonstrated by specific visual tricks that say something more basic about how human perceptual systems work.

An optical illusion. Square A is exactly the same shade of grey as square B. See Same color illusion

Magic tap, which appears to float in the sky with an endless supply of water. In actuality, there is a pipe hidden in the stream of water.

영상처리를 배우면 앞 부분에서 나오는 바로 그 내용 착시입니다.

요즘 같이 잉크젯의 품질이 좋지 않던 때에는 이런 현상을 이용해서 도트수를 적게 사용하고도 이미지를 만들었었죠 -_-; (가히 보기 않좋았던)


그림 및 설명 출처 : http://en.wikipedia.org/wiki/Optical_illusion