Brightness contours of NGC 4751 in the HST/WFC3 F160W (original or corrected) image (black) overlaid with the contours from the (3D) multi-Gaussian fit (red); the relatively dust-obscured regions of the galaxy (yellow shaded) were excluded from the fitting. Left panel: Original F160W image with the “half mask” applied. Central panel: Original F160W image with its respective “dust mask” applied. Right panel: Corrected F160W image with its respective “corrected dust mask” applied.