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Optical Illusions

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Optical illusions. Illusioni ottiche. Illusions d'optique. Illusions d'optique. Illusioni. Ebbinghaus Illusion - The Illusions Index. Crane, T., and French, C., 2016.

Ebbinghaus Illusion - The Illusions Index

The Problem of Perception. In: Zalta, E. N., ed. The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, CSLI, Stanford University. Doherty, M.J., Tsuji, H., & Phillips, W.A. (2008). Doherty, M. Julesz, B., 1971. Impossible Triangle - The Illusions Index. The Impossible Triangle (also known as the Penrose Triangle or the Impossible Tribar) was first created by Oscar Reutersvärd (1915 - 2002), a Swedish graphic artist known as the ‘father of the impossible figure’.

Impossible Triangle - The Illusions Index

It is anecdotally, but widely reported that he created it in 1934, aged 18 while doodling as a student in his Latin class. The illusion was independently discovered later and popularised by Lionel Sharples Penrose (1898 -1972), a British psychiatrist, geneticist, and mathematician, and his son Sir Roger Penrose (1931 -), a British mathematician, physicist and philosopher of science. Penrose and Penrose published the illusion in the British Journal of Psychology in 1958. The Penrose Triangle is an impossible figure (or impossible object or undecidable figure): it depicts an object which could not possibly exist. It is impossible for the Impossible Triangle to exist because in order for it to exist rules of Euclidean geometry would have to be violated. Optical Illusions And Pictures. Optical Illusions and Visual Phenomena.

Illusions. Perception puzzles, Visual Perception, Optical illusions and Paradoxes. This page illustrates that our visual perception cannot always be trusted.

Perception puzzles, Visual Perception, Optical illusions and Paradoxes

The components of an object can distort the perception of the complete object. Our mind is the final arbiter of truth. Most optical illusions are the result of 1) incongruent design elements at opposite ends of parallel lines, 2) influence of background patterns on the overall design, 3) adjustment of our perception at the boundaries of areas of high contrast, 4) afterimages resulting from eye movements or from kinetic displays, or 5) inability to interpret the spatial structure of an object from the context provided by the picture. The Parthenon Optical illusions have been studied for millenia. Perpetually ascending staircase. The red squares are the same color in the upper part and in the lower part of the "X" The diagonal lines are parallel.

There are no gray spots at the corners of the squares. Stairway between corners of a flat square. 2010 Finalists « Best Illusion of the Year Contest. Optical Illusions, Videos, Images, Brain Teasers and more! Good Morning and Happy Monday to everyone!

Optical Illusions, Videos, Images, Brain Teasers and more!

Hope the weekend was good and you had a Happy Father’s Day! Today’s optical illusion is remarkable one because it is going to force anyone that sees it to really look at it and use their imagination! So, what do you all see because you are supposed to see a Native American sitting on a horse right next to his village, and there is a beautiful rainbow overhead, which really adds something to the picture. However, that is not all that people are going to see, and their eyes and brain are immediately going to take this picture and start seeing other things in it. There is one very obvious animal in this picture, but the others are not so easy to find, but oh the fun you are going to have trying to find all the animals, and good luck finding them!

Want to see another great optical illusion? Sunday is here, which means one more day of the weekend to enjoy! 35 Insane Optical Illusions That Will Make You Question Your Sanity - distractify. These squares are actually the same exact color.

35 Insane Optical Illusions That Will Make You Question Your Sanity - distractify

Hold your finger over the boundary between the two shapes and see them change. Source: americanscientist.org The Cornsweet illusion exploits the brain's lateral inhibition, which creates more contrast between the two objects when they have different colored edges. Cross your eyes and you should be able to see a familiar face. Stare at this lady's nose for 10 seconds, then blink rapidly while looking at a light surface. These cars look like they're different sizes... Source: neatorama.com but in reality they're all the same.

The Ponzo illusion works because our brain judges an object’s size based its perceived distance. These dots seem to change color and orbit the center. Source: reddit.com Similarly, stare at the cross in the center and watch the blank spot. This park in Paris looks like it has a giant 3D globe... But it's actually completely flat. Which orange circle looks bigger?