GradientCorrection and MARS (I)

In the last two videos of this series, we compare results between GradientCorrection and the new gradient correction algorithms based on the Multiscale All-Sky Reference Survey (MARS) in PixInsight, emphasizing the difference between the correction of gradients based on intrinsic image data and external reference data.
00:30 NGC 1514
02:57 IC 4592
05:15 Messier 45