Galfit fitting by a single component and a combination of two components. The top panel shows the exponential profile study for the galaxy AGC 242175 in our LSB galactic sample, and the bottom panel shows the two-component (exponential + Sérsic) study for it. From left to right are the SDSS r-band image, the final model of the galaxy, and the residual image formed by subtracting the final model from the r-band image, respectively.