XReplace_Pix help page GENERAL DESCRIPTION The XReplace_Pix widget replaces bad values in a given image with the median of the good data in a suitable neighborhood of each bad pixel. CONTROLS/BUTTONS 'Read bad pixels': Enter name of FITS file containing a binary mask of bad pixels, marked by 0s. The bad pixels array must have the same size as the input image. 'Display Options': Modify the display options of the currently displayed image. 'Replace': Replace bad pixels. 'Help': Display this help page. 'Exit': Quit XHelp.