Scatter-plot showing a pixel-by-pixel comparison between intensities in the Hα line-center images (x-axis) and the SOT-like images (y-axis). Data from both GM and GDASH models are combined and pixels with very weak signal are excluded. The red line represents the Hα line-center intensity values converted into DC units. The blue line indicates a linear fit to the plotted data-points. The green contour marks the peak of the probability density function of the displayed data-points and encompasses an area containing 60% of all data-points.