5STEP 3Adjusting Scanned Images .......................................................... 35Tone Adjustment .................................................................................................. 36Histogram Settings ............................................................................................... 37Tone Curve Settings ............................................................................................. 40Brightness and Contrast Settings .........................................................................43Adjusting the Color Balance ................................................................................. 45Gamma Value Settings ......................................................................................... 46Adjusting the Threshold Value ............................................................................. 48Auto Tone Correction ........................................................................................... 49Unsharp Mask ...................................................................................................... 50Descreen .............................................................................................................. 51Saving/Recalling Settings ...................................................................................... 52Scanning Techniques ............................................................................................ 54Appendices ................................................................................................ 55Troubleshooting ................................................................................................... 56Error Messages .................................................................................................... 58Glossary ............................................................................................................... 59Index .................................................................................................................... 64Canon Customer Support Help Desk ...................................................................66