... Next: RegisteringPSF-Matching and Up: Image Restoration and Previous: Improvements in Filter . ... First, an experimental method for locating stellar images by enhancing the sharp cores of stars using a multi-channel entropy minimization technique is described. ... A default PSF may be used to regularize the result. ... Such simultaneous PSF determination can easily be added to the PLUCY two-channel code and a preliminary example of its use on HST data is given in Hook & Lucy (1994). ...