... touch input by fitting a transparent device with a touchsensing mechanism over the video monitor screen Touch input can be recorded using optical, electrical, or acoustical methods Optical touch ... per inch (Courtesy of IRIS Cmphio Inc., B c d w , Ma%nchuscih.) F i g u n 2-62 An e ~ ~ t a t i c that can printer display100 dots per inch (Courtesyof CaIComp Digitim Dioisia, a pf of r CPICmnp, ... - Figrrrc 2-19 Viewing a stereoscopic projection (Courlesy of S1ered;mphics Corpomlion.) A stereoscopic viewing pair (Courtesy ofjtny Farm.) 50 One way to produce a stereoscopiceffect is to...