Pearson coefficient of galaxy ellipticity measurements with three methods (CNN; REGAUSS, Rowe et al. 2015; model fitting, Sheldon 2015) as a function of the true magnitude and galaxy S/N. Gray histograms show the galaxy distributions. Galaxies with S/N > 50 sit in the bin of 45–50. The REGAUSS method exhibits failures in feature measurement (on highly noisy or highly elliptical sources), resulting in the rejection of approximately 55% of the sources. These galaxies are excluded from the ρ calculation in the “moments-based” method, while they are included in the “model-based” and “CNN” methods.