Comparison of the WOW, NAFE, and MGN algorithms. Top left: original γ-stretched (γ = 2.4) HRI_EUV image. The inset (top left quarter) shows an enlargement of the area within the white square. Top right: output of the edge-aware denoised version of the algorithm. Middle row: NAFE (left) and corresponding detail layer (right). Bottom row: MGN (left), and corresponding detail layer (right). In NAFE and MGN, the γ-stretched original image (top left) is added to their respective detail layers (right column). The left column thus corresponds to: no enhancement, added NAFE detail layer, added MGN detail layer. The standard WOW output does not include an arbitrary γ-stretched component. An animated version of this figure is available https://www.aanda.org/10.1051/0004-6361/202245345/olm.