Problem: Drift
copy of first image
(xn,yn)
(x1,y1)
–add
another copy of first image at the end
–this
gives a constraint: yn = y1
–there
are a bunch of ways to solve this problem
•add displacement of (y1 – yn)/(n - 1) to each image after the first
•compute a global warp: y’ = y + ax
•run a big
optimization problem, incorporating this constraint
–best solution,
but more complicated
–known as “bundle
adjustment”