Difference (in magnitudes) between the pure line flux in the polygons after continuum correction from the Brγ image, (H2 - Brγ) and the Ks image, (H2 - K_s) vs the continuum contamination (in magnitudes) in the polygons estimated as the difference between the total flux measured in the H2 band and the line flux corrected using the Brγ image (H2 - Brγ). The symbols refer to the polygons in Fig. 2, as explained at the top of the box. Two datasets have been used (PISCES 2012 and SOUL 2020).