Microtek ScanMaker 3600 User Manual page 118

ScanWizard 5's Color Matching System and the Advanced Image
Correction feature.
Experiment with the tools in your scanning software. Use White and
Black Point tool, for instance, to adjust the look of the image as a
whole, or use the Tone Curve tool to work on specific areas of the
image (such as lightening up an excessively dark area).