Comparison of the results of three image-reduction methods using 12 individual images, for the galaxy SUCD1. All three crops have a FOV of 2.4′ × 2.4′ and normal sky orientation. The IRAF result is shown in the upper left, THELI v2 in the upper right, and THELI v3 in the second row. The foreground stars in these frames have a FWHM variation of ±0.1″ while the S/N shows an increase by more than 10% and 50% for the THELI v2 and THELI v3, respectively, compared to IRAF. The actual reduced IRAF image size is approximately three times larger than the presented crop, while for THELI it is 20 times larger.