This document discusses how digital images are processed by computers. It explains that a digital image is composed of a grid of pixels, where each pixel is located by its row and column and contains a numeric value or vector of values. A monochrome image stores a single value per pixel, while a color image contains multiple bands of values at each pixel location.

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 Processing digital images by a digital
computer
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3.  p = (r,c) is the pixel location indexed by row, r, and
column, c.
 I(p) = I(r,c) is the value of the pixel at location p.
 If I(p) is a single number then I is monochrome.
 If I(p) is a vector (ordered list of numbers) then I has
multiple bands (e.g., a color image).
Pixel Location: p = (r , c)
Pixel Value: I(p) = I(r , c)
Pixel : [ p, I(p)]

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7. a grid of squares,
each of which
contains a single
color
each square is
called a pixel (for
picture element)
Color images have 3 values per
pixel; monochrome images have 1
value per pixel.

9. Usually with 2-bit
quantization, the
output intensities
are mapped to
{0,85,170,255},
and with with 1-bit
quantization, the
output intensities
are taken to be
{0,255}.