As shown in Figure 6, each of the three control points has three
parameters specifying its position and tangent. Some of these are
locked leaving six free parameters. These parameters are further
subject to hard constraints (see Figure 6) to enforce physically realizable
dot shapes.
Our goal is now to recover the parameters for all dots such that
each of the separated CMY channels is reproduced as accurately as
possible, subject to a number of regularization constraints. Specifi-
cally, for each channel we minimize the following energy function: