电子科发女学光电科学与工程学院 SCHOOL OF OPTOELECTRONIC SCIENCE AND ENGINEERING OF UESTC 3.1 Background Image enhancement using processes performed in the Spatial domain resulting in images in the Spatial domain. We can written as g(x,y)=T f(x,y) where f(x,y)is an original image,g(x,y)is an output and T[.]is a function defined in the area around (x,y).Image enhancement using processes performed in the Spatial domain resulting in images in the Spatial domain. We can written as g x y T f x y ( , ) ( , ) =   where f(x,y) is an original image, g(x,y) is an output and T[.] is a function defined in the area around (x,y). 3.1 Background