Examples of parameter spaces used to filter dwarf galaxy candidates. These four panels show the clearest separations we could empirically determine for our data between known dwarf galaxies from the literature (green points) and their nearest neighbors assumed to be non-dwarfs (red points). Top-left: Mean effective surface brightness, < μ_g >_e vs. apparent magnitude, m_g in the g band. Top-right: log(R₁₀₀/R₉₀) vs. log(m_g) in the g band. Bottom-left: Mean effective surface brightness, < μ_r >_e vs. m_r in the r band. Bottom-right: R₉₀/R₇₅ vs. m_i in the i band. The solid black line in each panel indicates the selection boundary we applied to filter out likely non-dwarf objects while preserving the majority of known dwarfs. The lines follow the relations B.5, B.7, B.1, and B.12, respectively.