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3
Image Transforms
3.1 Introduction
According to the Merriam-Webster dictionary, transform in its broadest sense
means “change in the external form or in the inner nature.” Continuing,
mathematical transform means: “to change to a different form having the
same value.” In this chapter, we are focusing on the image transforms.
Usually, an image is represented as a function of two spatial variables
and represented as
. The intensity at a particular point in an image is
the value taken by the function
at that spatial location. This domain
of representation is most common for image storage and display. Since an
image is a representation ...