Functional Image Analysis and Its Research of Application
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DOI: 10.25236/iccpb.2018.045
Author(s)
Xin Sui, Yi Sui
Corresponding Author
Yi Sui
Abstract
The concept of function has existed for a long time in ancient times. At first, people studied functions, but calculated them repeatedly against the analytic formula of functions. Later, the famous French mathematician Descartes introduced the plane rectangular coordinate system, which consists of two number axes. The two axes are perpendicular to each other, the origin coincides and the unit length is equal. Traditionally, the number axis of lead is called y axis, the horizontal number axis is called X axis, the top of Y axis is in the positive direction, and the right of X axis is in the positive direction. From then on, every point on the plane can be represented by the coordinates of the plane rectangular coordinate system.
Keywords
Function, Number, Coincides, Direction