Scanners
When using a scanner to digitize an image, it is equally important that you maintain shadow and highlight detail. Many scanners offer a histogram that will indicate if shadow or highlight detail has been lost. The features used to adjust the scan will vary from manufacturer to manufacturer, so you'll have to experiment with the features offered in the software that came with your scanner to determine which one will affect shadow and highlight detail. Some scanners are better than others at capturing shadow detail. The darkest shade the scanner can capture detail in without forcing an area to black is know as its D-Max. The higher the D-Max of your scanner, the deeper it can peer into the shadows of an image and still retain detail. ...
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