The Operation of Humans vs. Computers Essay -- Computer Science

The comparison of how earthly concern and computers operate is an integral part of inquiry in Cognitive Psychology. This search discusses how this comparison allows us to turn ways in which clements and computers ar similar into the development of useful computational models. These enhance our understanding of human perception in more detailed and quantitative ways which handed-down research would not allow. It contrasts this by describing ways in which humans and computers are different, highlighting how such(prenominal) models may have limited application, and must be kept in perspective. The field of opthalmic perception is one which has make good use of computational models to advance its knowledge, and so is a formal exemplar.One of the first instances of using a computational model to research visual perception was in response to the classic problem how does the visual system know that the varied appearance of a coloured muster up is a property of the surface rather t han its illumination? (Gordon, 2004, p. 187). Both prop and McCann (1971) and Horn (1974) suggested that the key distinction is that the effect of a channelise in illumination is gradual, whereas changes that are because of an objects edges are abrupt. To investigate, they recorded widening differences from two adjacent detectors which sample lightness values. They found that the difference in output on a uniform surface with a change in illumination was small and insignifi potbellyt, whereas when the detectors were on either side of a boundary between two surfaces of different lightness, there was a monolithic difference in output. This suggests that our visual system uses a similar method to detect important changes in surfaces properties and distinguish them from transitory changes in illumin... ...em such as vision, it is important not to oversimplify the idea to the point where a model is no longer representative of how the brain is working.Works CitedDreyfus, H. L. (1972 ). What computers cant do A critique of artificial reason. New York harpist & Row.Gordon, I. E. (2004). Theories of visual perception (3rd ed.). Hove Psychology Press.Horn, B. K. (1974). Determining lightness from an image. Computer fine art and Image Processing. 3, 277-299.Land, E. H. & McCann, J. J. (1971). Lightness and retinex theory. Journal of the Optical Society of America, 61, 1-11.Marr, D. (1982). Vision A computational investigation into the human representation and processing of visual information. San Francisco, CA W. H. Freeman.Marr, D. & Hildreth, E. (1980) Theory of edge detection. Proceedings of the Royal Society of London, Series B, 207, 187-217.