| Cornsweet Illusion - The History | | | | an illusory effect at time. Visual Illusions are |
| Tom Cornsweet, in 1960, founded Cornsweet | | | | intentionally framed to bluff the mind. |
| Illusion. A form of Optical Illusion, it is also known | | | | The Correlations |
| as Craik-O'Brien-Cornsweet Illusion or | | | | This Illusion is considered quite similar in style to |
| Craik-Cornsweet Illusion, as Craik and O'Brien had | | | | Mach Bands, except for the following two vital |
| also worked towards it in the past. | | | | differences:o In Mach Bands, the illusionary effect |
| The Concept | | | | is limited only to the part close to the intensity |
| In Cornsweet Illusion, a small color effect is given, | | | | gradient. However, in the Cornsweet Illusion, the |
| which imparts a contrasting illusionary effect to | | | | defining divisions influence the perception of the |
| the large area associated with it. The effect is | | | | total area attached to it.o In this Illusion, the area |
| called illusionary, because in reality the area is not | | | | close to the light part of the side appears lighter |
| affected. For example, a colored square is divided | | | | than the area close to the dark part of the side. |
| into two sections with the help of a perpendicular, | | | | This is just the opposite of the usual contrast |
| horizontal, or diagonal demarcation of very light | | | | effects of Mach Bands. |
| color. When viewed, one section will appear darker | | | | Application |
| in comparison to the other one. In reality | | | | The Cornsweet Illusion is used to in graphic |
| however, both the sections were at the same | | | | designing and the related applications for creating |
| contrast level. | | | | attractive and appealing visual effects. The |
| The main purpose of Visual Illusion, including | | | | knowledge of this illusion is also helpful in certain |
| Cornsweet Illusion is to understand and show the | | | | illumination-oriented fields, like radiology. If unaware |
| way human eye and brain process visual | | | | of the concepts, the specialists may misread the |
| information. In Optical Illusion, the brain uses the | | | | x-ray images. |
| contours of shapes in order to apply impact to | | | | The Artists |
| the regions around. This takes place as the nerve | | | | Key artists in the area of Cornsweet Illusions, |
| impulses are transmitted through the visual cortex | | | | include Giuseppe Arcimboldo (Italian - 1527-93), |
| in the brain. The retina in the eye perceives the | | | | M.C. Escher (Dutch - 1898-1972), Salvador Dali |
| images according to the luminance observed. | | | | (Spanish - 1904-1989), Marcel Duchamp (French |
| Therefore, basically, the brain interprets things | | | | American - 1887-1968), and Oscar |
| based on a set of limited parameters, resulting in | | | | Reutersvärd (Swedish 1915-2002). |