Comparison Hα images of V1094 Sco processed in standard HRSDI (top panel) and modified HRSDI (bottom panel). First three columns: same color scales. Column 1: residual images after the low-order correction in HRSDI. Column 2: same image as Col. 1, but with two injected fake planets at the radius of 0.1′′ and 0.35′′ (red circles). Column 3: residual images after the high-order correction (PCA). Column 4: corresponding S/N maps. The orange dashed circle is of radius r = 0.3′′, and the magenta cross indicates the star center. The FWHM of the V1094 Sco dataset is ~150 mas (6 spaxels across). Compared with standard HRSDI, modified HRSDI can effectively remove stellar emission after low-order correction and recover most of planet emission down to 0.1′′.