Accuracy of parameters for initial detections. Upper panels: ratio between the measured semimajor axis length and the input effective radii (a_out/R_e, in) for the mock galaxies as a function of their mean effective SB in the r′ band (). Lower panels: difference between the input magnitudes (m_in) and the measured magnitudes (m_out). Left and right panels: comparisons when using SE and MTO, respectively. The blue (MTO) and red (SE) lines correspond to the running means of the measurements with a filter size of = 1 mag arcsec⁻². Shaded areas around the running means show the median absolute deviation from the means with the corresponding colors. The gray and black symbols in the right panels correspond to the objects that are only detected using MTO and to the objects detected using both methods, respectively.