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 قسمتی از متن .ppt : 

Digital Image Processing

Image Enhancement in the Spatial Domain

It Makes all the difference whether one sees darkness through the light or brightness through the shadows.

David Lindsay

Lecturer : Ali Rezaee

2

Image Enhancement in the Spatial Domain

The result of Enhancement is application oriented

Spatial Domain Works on pixels’ values

Algorithms apply to a neighborhood of pixels

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Image Enhancement in the Spatial Domain

g( x, y ) = T [ f( x, y ) ]

f is first image pixels values

g is desire image pixels values

T is Transform operation

Pixel wise Measure

Applying to neighborhood of pixel

Types of neighborhood : square, circle estimate,...

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Image Enhancement in the Spatial Domain

Enhancement by Point Processing

Simple 1x1 Neighborhood

s = T( r )

Where r, s are gray level of input and desire images in pixel ( x, y )

r = f( x, y); s = g( x, y )

Mask Processing or Filtering