Image processing

A digital image is made up of pixels which each have a numerical value associated with the pixel colour. When we process an image we change the pixel values.
Median – removes noise
Mean – smooths the image
Edge finding – finds the edge fan object
Spreading pixel values – adjusts contrast

Some background ideas
http://en.m.wikibooks.org/wiki/A-level_Physics_(Advancing_Physics)/Digital_Processing
http://www.colorado.edu/physics/phys1230/phys1230_fa12/DigiColor.pdf
http://www.steves-digicams.com/knowledge-center/brightness-contrast-saturation-and-sharpness.html
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