#### Resolution Enhancement

Resolution enhancement allows us to assemble a plurality of images
into a common image.

Map makers and photogrammeters have previously assembled images into
a mosaic in a cut-and paste (euclidean) fashion. Researchers have
more recently
done this computationally and used the more general affine
rather than euclidean model.

Since mosaicing is done
mathematically, we are free to choose a still more
sophisticated model than the
affine model, and the model that we use is the plane projective
model. Each image is positioned in terms of its 4 corners (x and y)
giving 8 degrees of freedom. Another interpretation of these 8 dof is as
follows:

- translation x
- translation y
- dilation x
- dilation y
- shear x
- shear y
- chirp x
- chirp y

The first 6 of these are the traditional affine parameters.
To better understand these first 6, an excellent reference is
the book Linear Algebra.
An automated algorithm
called
CEMENT,
or cement-mix.
Cement-mix was originally developed
to combine and mix images that are "in the same orbit"
(either video or radar, or combinations of
both) automatically.

Take a closer look at the CEMENT algorithm,
with some examples of
*video orbits* CEMENTed to stills.