For more information about installing and using the scanning portions of XVScan see Scanning with XVScan xv is an interactive image manipulation program for the X Window System. It can operate on images in the GIF, JPEG, TIFF, PBM, PGM, PPM, XPM, X11 bitmap, Sun Rasterfile, RLE, RGB, BMP, PCX, FITS and PM formats on all known types of X displays. It can generate PostScript files, and if you have ghostscript version 2.6 or above installed on your machine, it can also display them.
Full manual is available online at the web site.