3 Image Enhancement 3.4 Fundamentals of spatial filtering >Spatial filters vs.frequency filters 1)one-to-one correspondence in many cases 2)Spatial filters offer considerably more versatility because they can be used also for nonlinear filtering,something we cannot do in the frequency domain 第3章第2页 3 Image Enhancement 第3章 第2页 3.4 Fundamentals of spatial filtering Spatial filters vs. frequency filters 1) one-to-one correspondence in many cases 2) Spatial filters offer considerably more versatility because they can be used also for nonlinear filtering, something we cannot do in the frequency domain