Total unsigned magnetic flux of both original and AI-based ones for the test set. (a) Temporal variations of the total unsigned magnetic flux. The bottom x-axis shows the observation date (year-month) for each DPD test image, while the top x-axis indicates the corresponding image index in the test set (from 1 to N), sorted in time. The black solid line shows variations from the original magnetograms and the blue solid line corresponds to those from the AI-based ones. (b) Scatter plot between the total unsigned magnetic fluxes of the original and AI-based magnetograms.