are detected separately by FOF, we repeat the above procedure to identify a new [*bridge pixel*]{}. The final set of [*bridge pixels*]{} is the minimum set of the faintest filled pixels we need to remove to separate the two sources. This process can be seen in Figure \[separate\] going from panel 5 back to panel 1. As soon as the set of [*bridge pixels*]{} are found and removed, the regions of the two sources are built directly with FOF. At the last step, each one of the bridge pixels are re-assigned to one of the two sources, with a simple criterion based on the neighboring filled pixels: if the majority of them belong to a given source, the [*bridge pixel*]{} is assigned to this source. In the very few cases where this condition does not apply, the bridge pixel is assigned randomly. The final result is shown in panel 6 of Figure \[separate\].

![Example of the deblending procedure applied to two unresolved sources spaced by $\sim 6$ pixels. In panels 1–5 we show the pixels whose photon density is above a threshold that increases at each step. [*Bridge pixels*]{} (see text for the definition) are marked with green boxes and 