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Human Visual System

Human Visual System In many image processing applications, the objective is to help a Human observer perceive the Visual information in an image. Therefore, it is important to understand the Human Visual System . The Human Visual System consists mainly of the eye (image sensor or camera), optic nerve (transmission path), and brain (image information processing unit or computer). It is one of the most sophisticated image processing and analysis systems. Its understanding would also help in the design of efficient, accurate and effective computer/machine vision systems. Cross-section of the Human Eye Cross-section of the Human Eye Nearly spherical with a diameter of 20 mm (approx.). Cornea --- Outer tough transparent membrane, covers anterior surface. Sclera --- Outer tough opaque membrane, covers rest of the optic globe. Choroid --- Contains blood vessels, provides nutrition.

the focal length. ... • The sampling process may be viewed as partitioning the real xy plane with a grid whose vertices are elements in the Cartesian product Z x Z, where Z is the set of integers. • If ∆x and ∆y are separation of grid points in the x and y directions,

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