PSF format is the default image format used in ArcSoft PhotoStudio, so any graphics conversions featuring this format can be only done using this software. As for export to one of the digital raw files, this might or might not be possible, depending on what the current version of the tool supports. But generally speaking, export to vendor specific RAW images is not something that is usual, using DGN or similar exchange format being the preferred way to store the RAWs in generic format.
Updated: November 1, 2023