03-1 - Basic intensity transforms

03-1 - Basic intensity transforms - 4/28/2008 Basic...

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4/28/2008 1 Basic intensity transforms by Gleb V. Tcheslavski: gleb@ee.lamar.edu 1 Spring 2008 ELEN 4304/5365 DIP Preliminaries The techniques to be discussed are implemented in the spatial domain: the plane containing the pixels Therefore we operate domain: the plane containing the pixels. Therefore, we operate directly on pixels of an image. The spatial domain processes will be denoted as [ ] (, ) gxy T f xy = 2 Spring 2008 ELEN 4304/5365 DIP The input image The output image An operator on f defined over a neighborhood of a point (x,y)
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4/28/2008 2 Preliminaries The point (x,y) is at an arbitrary location in the image. A small region contains the point and its neighborhood. Typically, a rectangular neighborhood much smaller than the image and centered at (x,y) is selected. Spring 2008 ELEN 4304/5365 DIP 3 The neighborhood is moved from pixel to pixel to generate the output according to the transformation. The neighborhood together with the operator form a spatial filter. Preliminaries The smallest possible neighborhood is of size 1x1 pixels. Therefore, g depends only on the value of f at a single point (x,y). T becomes an intensity ( gray level or mapping ) transformation function of the form () sT r = Intensity of g at a point (x,y) Intensity of f
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This note was uploaded on 12/08/2010 for the course ELEN 4304 taught by Professor Staff during the Spring '08 term at Lamar University.

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03-1 - Basic intensity transforms - 4/28/2008 Basic...

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