Computer Vision: Mosaics

Problem: Drift

Solution

•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”

(x1,y1)

copy of first image

(xn,yn)