  In the context of nucleon structure, the Wigner distribution has been
commonly used to visualize the phase-space distribution of quarks and gluons
inside the nucleon. However, the Wigner distribution does not allow for a
probabilistic interpretation because it takes negative values. In pursuit of a
positive phase-space distribution in QCD, we introduce the Husimi distribution
and demonstrate its advantages via a simple one-loop example. We also comment
on a possible connection to the semiclassical approach to saturation physics at
small-$x$.
