Starlet decomposition of an example noiseless convergence map κ(θ). The images are 150 × 150 with pixels of size 0.5 arcmin. The original map is shown along with the wavelet coefficient maps { w_j } up to j_max = 4. The final smoothed map c₅, i.e., the low-pass filtered version of κ, is not shown. The transform clearly picks out features of κ at successively larger scales as j increases.